Domain Intelligence Report

kubernetes.io

DNS records, WHOIS/RDAP registration, SSL certificate, subdomain enumeration, and email-security posture — aggregated in real time and cached.

6
DNS record types
60d
SSL cert remaining
4
Subdomains found
SPF
Email security
DNS

DNS Records

All record types resolved from authoritative DNS for kubernetes.io.

A 2 records
  • 3.33.186.135
  • 15.197.167.90
MX 5 records
  • 1 aspmx.l.google.com.
  • 10 alt3.aspmx.l.google.com.
  • 10 alt4.aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
  • 5 alt1.aspmx.l.google.com.
TXT 4 records
  • "1password-site-verification=SOZCTQ66DFFXVGPOWOHMVDIBVI"
  • "v=spf1 include:_spf.google.com mail.kubernetes.io ~all"
  • "google-site-verification=qmfDqvHjWJBL78F9saApyW0VFRyymuSMpqMn8gtGmd0"
  • "google-site-verification=oPORCoq9XU6CmaR7G_bV00CLmEz-wLGOL7SXpeEuTt8"
NS 4 records
  • ns-cloud-a2.googledomains.com.
  • ns-cloud-a1.googledomains.com.
  • ns-cloud-a4.googledomains.com.
  • ns-cloud-a3.googledomains.com.
CAA 2 records
  • 0 issue "letsencrypt.org"
  • 0 issue "pki.goog"
SOA 1 record
  • ns-cloud-a1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300
Registration

WHOIS / RDAP

Registration data for kubernetes.io via the RDAP protocol, with port-43 WHOIS fallback if RDAP is unavailable.

whois via fallback:https://rdap.identitydigital.services/rdap/
Registrar
1API GmbH
Created
2014-07-23T19:17:59Z
Updated
2025-11-26T19:11:26.796Z
Expires
2026-07-23T19:17:59Z
Nameservers
ns-cloud-a1.googledomains.comns-cloud-a2.googledomains.comns-cloud-a3.googledomains.comns-cloud-a4.googledomains.com
Status
client transfer prohibited
TLS

SSL Certificate

Live TLS handshake against kubernetes.io. No third-party scanner.

ssl 60 days remaining
Issuer
CN=E8,O=Let's Encrypt,C=US
Subject
CN=kubernetes.io
Valid from
2026-04-14T10:03:50+00:00
Valid to
2026-07-13T10:03:49+00:00
Serial
519993568649917957837649953608551526885163
SANs (2)
kubernetes.iowww.kubernetes.io
Reconnaissance

Subdomains discovered

Aggregated from Certificate Transparency logs (crt.sh, certspotter, hackertarget) with DNS bruteforce fallback if all CT sources fail.

⚠ Partial results — crt.sh status 429 · certspotter rate-limited · hackertarget limited: API count exceeded - Increase Quota with Membership
subdomains 4 found
crt.sh status 429 certspotter rate-limited hackertarget limited: API count exceeded - Increase Quota with Membership dns-brute ok +4 (wordlist 54)
  • blog.kubernetes.io
  • docs.kubernetes.io
  • mail.kubernetes.io
  • www.kubernetes.io
Email

Email Security Posture

SPF and DMARC presence and records for kubernetes.io. DKIM requires a known selector and is not auto-discoverable.

SPF present
  • v=spf1 include:_spf.google.com mail.kubernetes.io ~all
DMARC missing
DKIM selector required

DKIM requires selector; not auto-discoverable

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