Domain Intelligence Report

stackoverflow.com

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

6
DNS record types
66d
SSL cert remaining
7
Subdomains found
SPF + DMARC
Email security
DNS

DNS Records

All record types resolved from authoritative DNS for stackoverflow.com.

A 1 record
  • 198.252.206.1
MX 5 records
  • 5 alt1.aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
  • 1 aspmx.l.google.com.
  • 10 alt3.aspmx.l.google.com.
  • 10 alt4.aspmx.l.google.com.
TXT 21 records
  • "atlassian-domain-verification=byLeZgl3MIcfOqwWuMhq8Fhr/1zem/jIaouJegvDZbBKUU5OqhwDjdpkyYg5CTzm"
  • "docusign=4262531d-29f4-4a62-9f33-ae9f66f5247b"
  • "ZOOM_verify_AbkNwz5bBl0eurcDKyhhuk"
  • "apple-domain-verification=O9jlnJXAQ7sNSZqC"
  • "openai-domain-verification=dv-GLNufzbWDzAq0fDXHD6jxeCK"
  • "google-site-verification=2Bi6SYw5skkRexdtdLPL2gpxeIhLxnYVqITVP9Htl3w"
  • "cursor-domain-verification-sb0ayf=Pk6AyptQuTpzpcuSlfYGWloxv"
  • "ibmid=4e7cbbb3-5f12-40b4-96c7-5b064347b822"
  • "docker-verification=d65aee54-9091-4ceb-b792-61f5d5804050"
  • "anthropic-domain-verification-q70207=cKyy0llXkD10O4rDQpWz8tQ5K"
  • "profound-domain-verification-5p599x=hWudYd2Du6WOYOod5ko9Rwnp8"
  • "v=MCPv1; k=ed25519; p=VhBofO8RaYvTvHT7q5tTty+HQeCU8R6h5Y8k/sj20So="
  • "google-site-verification=rdWtMbplKjbRHGr2dNONfwkqithlUvjr3u6i8QEz_mo"
  • "google-site-verification=o3EMam8yBGo1yEjyybIiZcOunGHOQKpo8JmOtp9n1BU"
  • "google-site-verification=ctogLnZNAdc_CXq8yOhODMLpmugGynjxKecKHDz4oL8"
  • "v=spf1 ip4:52.38.191.241 include:_spf1.stackoverflow.com ~all"
  • "adobe-idp-site-verification=25ba5203f3687c9cd6ee3223ee5de1528917828d1da3ebd3bd9a44094cbfc4ac"
  • "onetrust-domain-verification=0d9d67f856334905a54256085a5768b3"
  • "MS=ms52592611"
  • "make-domain-verification=eec31159-f381-4f38-9d89-e59123dd023e"
  • "onetrust-domain-verification=e445562296a64c649ae3d520230b8c4c"
NS 2 records
  • damian.ns.cloudflare.com.
  • sureena.ns.cloudflare.com.
CAA 13 records
  • 0 issue "comodoca.com"
  • 0 issue "digicert.com; cansignhttpexchanges=yes"
  • 0 issue "letsencrypt.org"
  • 0 issue "pki.goog; cansignhttpexchanges=yes"
  • 0 issue "sectigo.com"
  • 0 issue "ssl.com"
  • 0 issuewild "comodoca.com"
  • 0 issuewild "digicert.com; cansignhttpexchanges=yes"
  • 0 issuewild "letsencrypt.org"
  • 0 issuewild "pki.goog; cansignhttpexchanges=yes"
  • 0 issuewild "sectigo.com"
  • 0 issuewild "ssl.com"
  • 128 iodef "mailto:sysadmin-team@stackoverflow.com"
SOA 1 record
  • damian.ns.cloudflare.com. dns.cloudflare.com. 2404086816 10000 2400 604800 1800
Registration

WHOIS / RDAP

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

whois via rdap.org
Registrar
CSC Corporate Domains, Inc.
Created
2003-12-26T19:18:07Z
Updated
2026-01-29T06:10:36Z
Expires
2027-02-02T11:59:59Z
Handle
108907621_DOMAIN_COM-VRSN
Nameservers
DAMIAN.NS.CLOUDFLARE.COMSUREENA.NS.CLOUDFLARE.COM
Status
client transfer prohibited
TLS

SSL Certificate

Live TLS handshake against stackoverflow.com. No third-party scanner.

ssl 66 days remaining
Issuer
CN=E7,O=Let's Encrypt,C=US
Subject
CN=stackoverflow.com
Valid from
2026-04-19T13:32:18+00:00
Valid to
2026-07-18T13:32:17+00:00
Serial
570173887381747205092901034449969800778218
SANs (2)
*.stackoverflow.comstackoverflow.com
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 7 found
crt.sh status 429 certspotter rate-limited hackertarget limited: API count exceeded - Increase Quota with Membership dns-brute ok +7 (wordlist 54)
  • api.stackoverflow.com
  • beta.stackoverflow.com
  • blog.stackoverflow.com
  • dev.stackoverflow.com
  • email.stackoverflow.com
  • mail.stackoverflow.com
  • www.stackoverflow.com
Email

Email Security Posture

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

SPF present
  • v=spf1 ip4:52.38.191.241 include:_spf1.stackoverflow.com ~all
DMARC present
  • v=DMARC1; p=reject; pct=100; rua=mailto:dmarc-aggregates@stackoverflow.com; ruf=mailto:dmarc-forensics@stackoverflow.com; fo=1
DKIM selector required

DKIM requires selector; not auto-discoverable

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