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
61d
SSL cert remaining
113
Subdomains found
SPF
Email security signals
Generated 2026-07-12 09:07 UTC Refresh data
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Common uses: SSL expiry monitoring Subdomain change alerts CRM lead enrichment SPF/DMARC/DKIM audits Domain reputation scoring Attack surface mapping Bulk WHOIS lookup SaaS onboarding checks
curl "https://domain-intelligence-api.p.rapidapi.com/lookup/kubernetes.io" \
  -H "X-RapidAPI-Host: domain-intelligence-api.p.rapidapi.com" \
  -H "X-RapidAPI-Key: YOUR_RAPIDAPI_KEY"
import requests

url = "https://domain-intelligence-api.p.rapidapi.com/lookup/kubernetes.io"
headers = {
    "X-RapidAPI-Host": "domain-intelligence-api.p.rapidapi.com",
    "X-RapidAPI-Key": "YOUR_RAPIDAPI_KEY",
}
r = requests.get(url, headers=headers, timeout=15)
data = r.json()
print(data["subdomains"]["count"], "subdomains found")
// Node 18+ has built-in fetch — no import needed
const res = await fetch(
  "https://domain-intelligence-api.p.rapidapi.com/lookup/kubernetes.io",
  { headers: {
      "X-RapidAPI-Host": "domain-intelligence-api.p.rapidapi.com",
      "X-RapidAPI-Key": "YOUR_RAPIDAPI_KEY",
  }}
);
const data = await res.json();
console.log(data.dns.A, data.email_security.spf);
<?php
$ch = curl_init("https://domain-intelligence-api.p.rapidapi.com/lookup/kubernetes.io");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "X-RapidAPI-Host: domain-intelligence-api.p.rapidapi.com",
    "X-RapidAPI-Key: YOUR_RAPIDAPI_KEY",
]);
$data = json_decode(curl_exec($ch), true);
curl_close($ch);
echo $data["subdomains"]["count"];
Free tier: 1,000 requests/month · no credit card · all endpoints included See all plans →
DNS

DNS Records

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

A 2 records
  • 15.197.167.90
  • 3.33.186.135
MX 5 records
  • 5 alt1.aspmx.l.google.com.
  • 10 alt4.aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
  • 1 aspmx.l.google.com.
  • 10 alt3.aspmx.l.google.com.
TXT 4 records
  • "google-site-verification=oPORCoq9XU6CmaR7G_bV00CLmEz-wLGOL7SXpeEuTt8"
  • "google-site-verification=qmfDqvHjWJBL78F9saApyW0VFRyymuSMpqMn8gtGmd0"
  • "v=spf1 include:_spf.google.com mail.kubernetes.io ~all"
  • "1password-site-verification=SOZCTQ66DFFXVGPOWOHMVDIBVI"
NS 4 records
  • ns-cloud-a2.googledomains.com.
  • ns-cloud-a4.googledomains.com.
  • ns-cloud-a1.googledomains.com.
  • ns-cloud-a3.googledomains.com.
CAA 2 records
  • 0 issue "pki.goog"
  • 0 issue "letsencrypt.org"
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 61 days remaining
Issuer
CN=YE2,O=Let's Encrypt,C=US
Subject
CN=kubernetes.io
Valid from
2026-06-13T09:13:56+00:00
Valid to
2026-09-11T09:13:55+00:00
Serial
504702488333406705829006375206979627440489
SANs (2)
kubernetes.iowww.kubernetes.io
Reconnaissance

Subdomains discovered

Aggregated from 5 upstream sources in parallel — crt.sh, certspotter, hackertarget, rapiddns, and VirusTotal — plus an always-on DNS bruteforce across a curated 773-word wordlist with automatic wildcard filtering, and background enrichment aggregating 25+ passive sources for comprehensive coverage.

subdomains 44 live · 113 discovered
dns-brute: 1 foundsubfinder: 113 foundvirustotal: 155 found
  • apt.kubernetes.io 34.107.204.206
  • blog.kubernetes.io 34.107.204.206
  • canary.kubernetes.io 15.197.167.90
  • changelog.kubernetes.io 34.107.204.206
  • ci-test.kubernetes.io 34.107.204.206
  • code.kubernetes.io 34.107.204.206
  • conduct.kubernetes.io 34.107.204.206
  • cs.kubernetes.io 34.117.143.16
  • discuss.kubernetes.io 184.105.99.75
  • docs.kubernetes.io 34.107.204.206
  • examples.kubernetes.io 34.107.204.206
  • feature.kubernetes.io 34.107.204.206
  • features.kubernetes.io 34.107.204.206
  • gcsweb.kubernetes.io 35.190.8.208
  • get.kubernetes.io 34.107.204.206
  • git.kubernetes.io 34.107.204.206
  • go.kubernetes.io 34.107.204.206
  • hugo-migration.docs.kubernetes.io 18.208.88.157
  • issue.kubernetes.io 34.107.204.206
  • issues.kubernetes.io 34.107.204.206
  • kep.kubernetes.io 34.107.204.206
  • kind.docs.kubernetes.io 18.208.88.157
  • kubectl.docs.kubernetes.io 18.208.88.157
  • kubernetes.io 15.197.167.90
  • mail.kubernetes.io u21992032.wl033.sendgrid.net
  • packages.kubernetes.io 34.107.204.206
  • pkgs.kubernetes.io 34.107.204.206
  • pr-test.kubernetes.io 34.107.204.206
  • pr.kubernetes.io 34.107.204.206
  • prow.kubernetes.io 34.107.204.206
  • prs.kubernetes.io 34.107.204.206
  • rel.kubernetes.io 34.107.204.206
  • releases.kubernetes.io 34.107.204.206
  • sbom.kubernetes.io 34.107.204.206
  • sigs.kubernetes.io 34.107.204.206
  • slack-infra.kubernetes.io 34.107.195.71
  • slack.kubernetes.io 34.107.204.206
  • submit-queue.kubernetes.io 34.107.204.206
  • testgrid-data.kubernetes.io testgrid-data.k8s.io
  • testgrid.kubernetes.io 34.120.51.46
  • www.kubernetes.io 15.197.167.90
  • youtube.kubernetes.io 34.107.204.206
  • yt.kubernetes.io 34.107.204.206
  • yum.kubernetes.io 34.107.204.206

+ 69 more seen in CT logs / passive DNS (historical — may be inactive)

Collapsed shared-infra: 45× *.docs.kubernetes.io

Email

Email Security Posture

SPF and DMARC presence and records for kubernetes.io, plus DKIM keys auto-probed across 29 common selectors (Google Workspace, Microsoft 365, Mailchimp, SendGrid, Postmark and more).

SPF present
  • v=spf1 include:_spf.google.com mail.kubernetes.io ~all
DMARC missing
DKIM none via common selectors

Probed common selectors (Google, Microsoft 365, Mailchimp, SendGrid, etc.). Custom or hash-based selectors aren't auto-discoverable.

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