Engineer's DNS Intelligence Report
| Parameter | Current | Suggested | Severity | Rationale |
|---|---|---|---|---|
| timeout_seconds | 5s |
8s |
low | Average scan duration is 30.3s, suggesting DNS responses are slow for this domain. Increasing timeout from 5s to 8s prevents premature resolution failures. RFC 8767 |
DNSSEC (DNS Security Extensions) cryptographically signs DNS responses, preventing attackers from forging DNS answers. Contact your DNS hosting provider to enable DNSSEC signing.
Publish a BIMI DNS record pointing to your brand logo (SVG Tiny PS format). For full support in Gmail, you will also need a Verified Mark Certificate (VMC).
Email Security Methodology Can this domain be impersonated by email? No
SPF Record RFC 7208 §4 Verified
SPF valid with industry-standard soft fail (~all), 1/10 lookups
DMARC Policy RFC 7489 §6.3 Verified
DMARC policy reject (100%) - excellent protection
pct= with t= (testing flag), add np= (non-existent subdomain policy), and mandate DNS tree walk for policy discovery instead of the Public Suffix List.DKIM Records RFC 6376 §3.6 Verified
DKIM not discoverable via common selectors (large providers use rotating selectors)
l= tag body length vulnerability (attacker appends unsigned content to signed mail),
weak key exploitation (keys below 1024-bit are cryptographically breakable per RFC 6376 §3.3.3),
DKIM replay attacks (re-sending legitimately signed messages at scale)
MTA-STS RFC 8461 §3 Verified
MTA-STS enforced - TLS required for 3 mail server(s)
- Mode:
enforce - Max Age: 1 days (86400 seconds)
- MX Patterns: smtp.google.com, aspmx.l.google.com, *.aspmx.l.google.com
MTA-STS policy enforcement is evaluated in Mail Transport Security below.
TLS-RPT RFC 8460 §3 Verified
TLS-RPT configured - receiving TLS delivery reports
DANE / TLSA Verified Recon Methodology Can mail servers establish identity without a public CA? via MTA-STS (CA)
DANE not available — Google Workspace does not support inbound DANE/TLSA on its MX infrastructure
Google Workspace supports DANE for outbound mail verification but does not publish TLSA records for its MX hosts.
Recommended alternative: MTA-STS (already configured)
Note: Google Workspace does validate DANE/TLSA when sending mail to DANE-enabled recipients (outbound DANE).
Two mechanisms protect email in transit. DANE is the primary standard; MTA-STS is the alternative for domains that cannot deploy DNSSEC:
- DNSSEC + DANE (RFC 7672) — Cryptographic chain of trust from DNS root to mail server certificate. Eliminates reliance on certificate authorities. No trust-on-first-use weakness. Requires DNSSEC.
- MTA-STS (RFC 8461) — HTTPS-based policy requiring TLS for mail delivery. Works without DNSSEC but relies on CA trust and is vulnerable on first use (§10). Created for domains where “deploying DNSSEC is undesirable or impractical” (§2).
Industry trend: Microsoft Exchange Online enforces inbound DANE with DNSSEC (GA October 2024), and providers like Proton Mail and Fastmail also support DANE. Google Workspace does not support DANE and relies on MTA-STS. Both mechanisms coexist because DANE is backward-compatible — senders skip the check if the domain isn't DNSSEC-signed (RFC 7672 §1.3).
Brand Security Can this brand be convincingly faked?
BIMI BIMI Spec Verified Warning
No BIMI record found
CAA RFC 8659 §4 Verified Success
CAA configured - only pki.goog can issue certificates
Mail Transport Security Beta Is mail transport encrypted and verified? Not Enforced
Transport security inferred from 3 DNS signal(s)
- MTA-STS policy in enforce mode requires encrypted transport
- TLS-RPT configured — domain monitors TLS delivery failures
- Google Workspace enforces TLS 1.2+ with valid certificates on all inbound/outbound mail
Infrastructure Intelligence Who hosts this domain and what services power it? Direct
ASN / Network Success
Resolved 1 unique ASN(s) across 10 IP address(es)
| ASN | Name | Country |
|---|---|---|
AS15169 |
US |
142.250.152.138 → AS15169 (142.250.0.0/15)142.250.152.139 → AS15169 (142.250.0.0/15)142.250.152.102 → AS15169 (142.250.0.0/15)142.250.152.101 → AS15169 (142.250.0.0/15)142.250.152.100 → AS15169 (142.250.0.0/15)142.250.152.113 → AS15169 (142.250.0.0/15)2607:f8b0:4001:c56::65 → AS15169 (2607:f8b0:4001::/48)2607:f8b0:4001:c56::64 → AS15169 (2607:f8b0:4001::/48)2607:f8b0:4001:c56::8b → AS15169 (2607:f8b0:4001::/48)2607:f8b0:4001:c56::71 → AS15169 (2607:f8b0:4001::/48)Edge / CDN Success Google Cloud
Domain is behind Google Cloud edge network
SaaS TXT Footprint Success 6 services
6 SaaS service(s) detected via TXT record verification
Detects SaaS services that leave DNS TXT verification records (e.g., domain ownership proofs). Does not detect all SaaS platforms — only those indicated by DNS.
| Service | Verification Record |
|---|---|
facebook-domain-verification=22rm551cu4k0ab0bxsw536tlds4h95 |
|
| Cisco | cisco-ci-domain-verification=47c38bc8c4b74b7233e9053220c1bbe76bcc1cd33c7acf7acd3... |
| Google Workspace | google-site-verification=wD8N7i1JTNTkezJ49swvWW48f8_9xveREV4oB-0Hf5o |
| Apple | apple-domain-verification=30afIBcvSuDV2PLX |
| DocuSign | docusign=1b0a6754-49b1-4db5-8540-d2c12664b289 |
| Microsoft 365 | MS=E4A68B9AB2BB9670BCE15412F62916164C0B20BB |
Domain Security Methodology Can DNS responses be tampered with in transit?
DNSSEC RFC 4033 §2 Verified Unsigned
DNSSEC not configured - DNS responses are unsigned
NS Delegation Verified
4 nameserver(s) configured
HTTPS / SVCB Records RFC 9460 Success HTTPS HTTP/3
HTTPS records found, HTTP/3 supported
| Priority | Target | ALPN | ECH | Raw |
|---|---|---|---|---|
| 1 | . |
h2, h3 | No | google.com. 14442 IN HTTPS 1 . alpn="h2,h3" |
Traffic & Routing Where does this domain's traffic actually terminate?
AIPv4 Address
AAAAIPv6 Address
MXMail Servers
SRVServices
Subdomain Discovery RFC 6962 Recon LIVE What subdomains and infrastructure are exposed in certificate logs? 224 subdomains discovered
How did we find these?| Subdomain | Source | Status | Provider / CNAME | Certificates | First Seen | Issuer(s) |
|---|---|---|---|---|---|---|
|
CT Log | Expired | — | 1 | — | — |
|
CT Log | Expired | — | 20 | — | — |
|
CT Log | Expired | — | 48 | — | — |
|
CT Log | Expired | — | 48 | — | — |
|
CT Log | Expired | — | 1 | — | — |
|
CT Log | Expired | — | 75 | — | — |
|
CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
|
CT Log | Expired | — | 1 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 93 | — | — |
|
CT Log | Expired | — | 4 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 3 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 10 | — | — |
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CT Log | Expired | — | 4 | — | — |
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CT Log | Expired | — | 9 | — | — |
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CT Log | Expired | — | 9 | — | — |
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CT Log | Expired | — | 9 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 9 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 9 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 9 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 9 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 9 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 9 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 9 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 2 | — | — |
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CT Log | Expired | — | 4 | — | — |
|
CT Log | Expired | — | 44 | — | — |
|
CT Log | Expired | — | 11 | — | — |
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CT Log | Expired | — | 39 | — | — |
|
CT Log | Expired | — | 50 | — | — |
|
CT Log | Expired | — | 122 | — | — |
|
CT Log | Expired | — | 3 | — | — |
|
CT Log | Expired | — | 39 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 13 | — | — |
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CT Log | Expired | — | 4 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 14 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 20 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 2 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 137 | — | — |
|
CT Log | Expired | — | 56 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 121 | — | — |
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CT Log | Expired | — | 52 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
|
CT Log | Expired | — | 88 | — | — |
|
CT Log | Expired | — | 20 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 2 | — | — |
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CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 48 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 11 | — | — |
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CT Log | Expired | — | 20 | — | — |
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CT Log | Expired | — | 48 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 3 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 17 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 1 | — | — |
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CT Log | Expired | — | 2 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 2 | — | — |
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CT Log | Expired | — | 2 | — | — |
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CT Log | Expired | — | 10 | — | — |
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CT Log | Expired | — | 2 | — | — |
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CT Log | Expired | — | 8 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 7 | — | — |
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CT Log | Expired | — | 45 | — | — |
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CT Log | Expired | — | 4 | — | — |
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CT Log | Expired | — | 4 | — | — |
|
CT Log | Expired | — | 20 | — | — |
|
CT Log | Expired | — | 48 | — | — |
|
CT Log | Expired | — | 153 | — | — |
|
CT Log | Expired | — | 2 | — | — |
|
CT Log | Expired | — | 15 | — | — |
|
CT Log | Expired | — | 47 | — | — |
|
CT Log | Expired | — | 2 | — | — |
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CT Log | Expired | — | 2 | — | — |
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CT Log | Expired | — | 2 | — | — |
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CT Log | Expired | — | 3 | — | — |
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CT Log | Expired | — | 4 | — | — |
|
CT Log | Expired | — | 4 | — | — |
|
CT Log | Expired | — | 4 | — | — |
|
CT Log | Expired | — | 30 | — | — |
|
CT Log | Expired | — | 1 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 5 | — | — |
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CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 3 | — | — |
|
CT Log | Expired | — | 3 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 15 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 20 | — | — |
|
CT Log | Expired | — | 48 | — | — |
|
CT Log | Expired | — | 73 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 39 | — | — |
|
CT Log | Expired | — | 60 | — | — |
|
CT Log | Expired | — | 32 | — | — |
|
CT Log | Expired | — | 32 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 4 | — | — |
|
CT Log | Expired | — | 4 | — | — |
|
CT Log | Expired | — | 4 | — | — |
|
CT Log | Expired | — | 130 | — | — |
|
CT Log | Expired | — | 52 | — | — |
|
CT Log | Expired | — | 6 | — | — |
|
CT Log | Expired | — | 20 | — | — |
|
CT Log | Expired | — | 48 | — | — |
|
CT Log | Expired | — | 3 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 76 | — | — |
|
CT Log | Expired | — | 52 | — | — |
|
CT Log | Expired | — | 2 | — | — |
|
CT Log | Expired | — | 2 | — | — |
|
CT Log | Expired | — | 3 | — | — |
|
CT Log | Expired | — | 7 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 77 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 2 | — | — |
|
CT Log | Expired | — | 1 | — | — |
|
CT Log | Expired | — | 4 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 13 | — | — |
|
CT Log | Expired | — | 84 | — | — |
|
CT Log | Expired | — | 65 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 126 | — | — |
|
CT Log | Expired | — | 66 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 5 | — | — |
|
CT Log | Expired | — | 60 | — | — |
|
CT Log | Expired | — | 20 | — | — |
|
CT Log | Expired | — | 38 | — | — |
|
CT Log | Expired | — | 48 | — | — |
DNS Evidence Diff Side-by-side comparison
142.250.152.138
142.250.152.101
142.250.152.139
142.250.152.139
142.250.152.102
142.250.152.113
142.250.152.101
142.250.152.100
142.250.152.100
142.250.152.138
142.250.152.113
142.250.152.102
2607:f8b0:4001:c56::65
2607:f8b0:4001:c56::65
2607:f8b0:4001:c56::64
2607:f8b0:4001:c56::66
2607:f8b0:4001:c56::8b
2607:f8b0:4001:c56::8b
2607:f8b0:4001:c56::71
2607:f8b0:4001:c56::8a
0 issue "pki.goog"
0 issue "pki.goog"
v=DMARC1; p=reject; rua=mailto:mailauth-reports@google.com
v=DMARC1; p=reject; rua=mailto:mailauth-reports@google.com
v=STSv1; id=20210803T010101;
v=STSv1; id=20210803T010101;
10 smtp.google.com.
10 smtp.google.com.
ns3.google.com.
ns2.google.com.
ns1.google.com.
ns1.google.com.
ns2.google.com.
ns4.google.com.
ns4.google.com.
ns3.google.com.
ns1.google.com. dns-admin.google.com. 868588076 900 900 1800 60
ns1.google.com. dns-admin.google.com. 868588076 900 900 1800 60
v=TLSRPTv1;rua=mailto:sts-reports@google.com
v=TLSRPTv1;rua=mailto:sts-reports@google.com
facebook-domain-verification=22rm551cu4k0ab0bxsw536tlds4h95
cisco-ci-domain-verification=47c38bc8c4b74b7233e9053220c1bbe76bcc1cd33c7acf7acd36cd6a5332004b
cisco-ci-domain-verification=47c38bc8c4b74b7233e9053220c1bbe76bcc1cd33c7acf7acd36cd6a5332004b
globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=
google-site-verification=wD8N7i1JTNTkezJ49swvWW48f8_9xveREV4oB-0Hf5o
onetrust-domain-verification=6d685f1d41a94696ad7ef771f68993e0
google-site-verification=TV9-DBe4R80X4v0M4U_bd_J9cpOJM0nikft0jAgjmsQ
docusign=1b0a6754-49b1-4db5-8540-d2c12664b289
onetrust-domain-verification=6d685f1d41a94696ad7ef771f68993e0
MS=E4A68B9AB2BB9670BCE15412F62916164C0B20BB
apple-domain-verification=30afIBcvSuDV2PLX
google-site-verification=wD8N7i1JTNTkezJ49swvWW48f8_9xveREV4oB-0Hf5o
globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=
docusign=1b0a6754-49b1-4db5-8540-d2c12664b289
google-site-verification=4ibFUgB-wXLQ_S7vsXVomSTVamuOXBiVAzpR5IZ87D0
v=spf1 include:_spf.google.com ~all
MS=E4A68B9AB2BB9670BCE15412F62916164C0B20BB
docusign=05958488-4752-4ef2-95eb-aa7ba8a3bd0e
DNS History Timeline BETA
When was a record added, removed, or changed — and could that change be the problem?
Confirm Your Email Configuration
This tool analyzes DNS records, but to verify actual email delivery, send a test email to Red Sift Investigate. Their tool shows exactly how your emails arrive, including SPF/DKIM/DMARC pass/fail results in the headers.
DATA FRESHNESS & METHODOLOGY
All security-critical records (SPF, DMARC, DKIM, DANE/TLSA, DNSSEC, MTA-STS, TLS-RPT, BIMI, CAA) are queried live from authoritative nameservers and cross-referenced against 5 independent public DNS resolvers (Cloudflare, Google, Quad9, OpenDNS, DNS4EU) at the time of each analysis. No security verdict uses cached data.
Registrar data (RDAP) is cached for up to 24 hours because domain ownership and registration details change infrequently. Certificate Transparency logs (subdomain discovery via RFC 6962) are cached for 1 hour because CT entries are append-only historical records. Sections using cached data are marked with a CACHED badge; live queries show LIVE.
Intelligence Sources
This analysis used 4 DNS resolvers (consensus), reverse DNS (PTR), Team Cymru (ASN attribution), IANA RDAP (registrar), SecurityTrails (DNS history), crt.sh (CT logs), and SMTP probing (transport). All using open-standard protocols.
Verify Report Integrity SHA-3-512 Has this report been altered since generation? Verify below
This cryptographic hash seals the analysis data, domain, timestamp, and tool version into a tamper-evident fingerprint. Any modification to the report data will produce a different hash. This is distinct from the posture hash (used for drift detection) — the integrity hash uniquely identifies this specific report instance.
9e9c13834606d9d1116b2e96eff2f0c77b16be3d2cbf3556b643f068744cab913c61867fd83115ac0690202857ee44e8c18f2b5cfcd5265da3629c7726ce7a05
Download the intelligence dump and verify its integrity, like you would a Kali ISO or any critical artifact. The SHA-3-512 checksum covers every byte of the download — deterministic serialization ensures identical hashes across downloads.
After downloading, verify with any of these commands:
Tip: cd ~/Downloads first (or wherever you saved the files).
cat dns-intelligence-google.com.json.sha3 && echo '---' && openssl dgst -sha3-512 dns-intelligence-google.com.jsonpython3 -c "import hashlib; print(hashlib.sha3_512(open('dns-intelligence-google.com.json','rb').read()).hexdigest())"sha3sum -a 512 dns-intelligence-google.com.json.sha3 file or the checksum API at /api/analysis/633/checksum. Hash algorithm: SHA-3-512 (Keccak, NIST FIPS 202).
Every finding in this report is backed by DNS queries you can run yourself. These vetted one-liners reproduce the exact checks used to build this report for google.com. Our analysis adds multi-resolver consensus, RFC-based evaluation, and cross-referencing — but the underlying data is always independently verifiable. We are intelligence analysts, not gatekeepers.
DNS Records
dig +noall +answer google.com Adig +noall +answer google.com AAAAdig +noall +answer google.com MXdig +noall +answer google.com NSdig +noall +answer google.com TXTEmail Authentication
dig +short google.com TXT | grep -i spfdig +short _dmarc.google.com TXTdig +short default._domainkey.google.com TXTdig +short google._domainkey.google.com TXTdig +short selector1._domainkey.google.com TXTdig +short selector2._domainkey.google.com TXTDomain Security
dig +dnssec +noall +answer google.com DNSKEYdig +noall +answer google.com DSdig +dnssec +cd google.com A @1.1.1.1Transport Security
dig +noall +answer _25._tcp.smtp.google.com TLSAopenssl s_client -starttls smtp -connect smtp.google.com:25 -servername smtp.google.com 2>/dev/null | openssl x509 -noout -subject -datesdig +short _mta-sts.google.com TXTcurl -sL https://mta-sts.google.com/.well-known/mta-sts.txtdig +short _smtp._tls.google.com TXTBrand & Trust
dig +short default._bimi.google.com TXTdig +noall +answer google.com CAADNS Records
dig +noall +answer google.com HTTPSDomain Security
dig +noall +answer google.com CDSInfrastructure Intelligence
curl -sL 'https://rdap.org/domain/google.com' | python3 -m json.tool | head -50Transport Security
openssl s_client -starttls smtp -connect smtp.google.com:25 -servername smtp.google.com </dev/null 2>/dev/null | head -5Infrastructure Intelligence
curl -s 'https://crt.sh/?q=%25.google.com&output=json' | python3 -c "import json,sys; [print(e['name_value']) for e in json.load(sys.stdin)]" | sort -u | head -20curl -sL https://google.com/.well-known/security.txt | head -20AI Surface
curl -sI https://google.com/llms.txt | head -5curl -s https://google.com/robots.txt | grep -i -E 'GPTBot|ChatGPT|Claude|Anthropic|Google-Extended|CCBot|PerplexityBot'Infrastructure Intelligence
dig +short 138.152.250.142.origin.asn.cymru.com TXTdig +short 139.152.250.142.origin.asn.cymru.com TXTdig, openssl, and curl — standard tools available on macOS, Linux, and WSL. Results may vary slightly due to DNS propagation timing and resolver caching.
Appendix: Verification Commands
DNS Records
dig +noall +answer google.com Adig +noall +answer google.com AAAAdig +noall +answer google.com MXdig +noall +answer google.com NSdig +noall +answer google.com TXTEmail Authentication
dig +short google.com TXT | grep -i spfdig +short _dmarc.google.com TXTdig +short default._domainkey.google.com TXTdig +short google._domainkey.google.com TXTdig +short selector1._domainkey.google.com TXTdig +short selector2._domainkey.google.com TXTDomain Security
dig +dnssec +noall +answer google.com DNSKEYdig +noall +answer google.com DSdig +dnssec +cd google.com A @1.1.1.1Transport Security
dig +noall +answer _25._tcp.smtp.google.com TLSAopenssl s_client -starttls smtp -connect smtp.google.com:25 -servername smtp.google.com 2>/dev/null | openssl x509 -noout -subject -datesdig +short _mta-sts.google.com TXTcurl -sL https://mta-sts.google.com/.well-known/mta-sts.txtdig +short _smtp._tls.google.com TXTBrand & Trust
dig +short default._bimi.google.com TXTdig +noall +answer google.com CAADNS Records
dig +noall +answer google.com HTTPSDomain Security
dig +noall +answer google.com CDSInfrastructure Intelligence
curl -sL 'https://rdap.org/domain/google.com' | python3 -m json.tool | head -50Transport Security
openssl s_client -starttls smtp -connect smtp.google.com:25 -servername smtp.google.com </dev/null 2>/dev/null | head -5Infrastructure Intelligence
curl -s 'https://crt.sh/?q=%25.google.com&output=json' | python3 -c "import json,sys; [print(e['name_value']) for e in json.load(sys.stdin)]" | sort -u | head -20curl -sL https://google.com/.well-known/security.txt | head -20AI Surface
curl -sI https://google.com/llms.txt | head -5curl -s https://google.com/robots.txt | grep -i -E 'GPTBot|ChatGPT|Claude|Anthropic|Google-Extended|CCBot|PerplexityBot'Infrastructure Intelligence
dig +short 138.152.250.142.origin.asn.cymru.com TXTdig +short 139.152.250.142.origin.asn.cymru.com TXT