Domain Intelligence Report

go.dev

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

7
DNS record types
88d
SSL cert remaining
29
Subdomains found
Email security signals
Generated 2026-07-28 19:01 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/go.dev" \
  -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/go.dev"
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/go.dev",
  { 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
$ch = curl_init("https://domain-intelligence-api.p.rapidapi.com/lookup/go.dev");
curl_setopt($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 go.dev.

A 4 records
  • 216.239.38.21
  • 216.239.36.21
  • 216.239.34.21
  • 216.239.32.21
AAAA 4 records
  • 2001:4860:4802:32::15
  • 2001:4860:4802:38::15
  • 2001:4860:4802:34::15
  • 2001:4860:4802:36::15
MX 5 records
  • 5 alt2.aspmx.l.google.com.
  • 5 alt1.aspmx.l.google.com.
  • 10 alt4.aspmx.l.google.com.
  • 1 aspmx.l.google.com.
  • 10 alt3.aspmx.l.google.com.
TXT 5 records
  • "google-site-verification=qvibgBDBD_1VeFXvgduqw1cmDeMpAS_qBCZCFauYduk"
  • "google-site-verification=eqtrduRyMRS8TuoUEuYMF-u9_IDRMd1In6T6E1gTchU"
  • "google-site-verification=eYE-BIP9BY8VZCUI_r8sJi7qjRVtxyRQSlbZmeVVlzE"
  • "google-site-verification=3oHHTSOKrjE9J8SIvyj3gUxEtDjmr5oNZ-DbB271vpM"
  • "google-site-verification=mJdpiJi2GyNG9nz7sctCXgJnzDHzdFzfhOqTTDuMR0s"
NS 4 records
  • ns-cloud-e2.googledomains.com.
  • ns-cloud-e4.googledomains.com.
  • ns-cloud-e1.googledomains.com.
  • ns-cloud-e3.googledomains.com.
CAA 2 records
  • 0 issue "letsencrypt.org"
  • 0 issue "pki.goog"
SOA 1 record
  • ns-cloud-e1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300
Registration

WHOIS / RDAP

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

whois via rdap.org
Registrar
MarkMonitor Inc.
Created
2019-02-13T16:28:35.767Z
Updated
2026-01-17T10:26:49.100Z
Expires
2027-02-13T16:28:35.767Z
Handle
31A7CAC1B-DEV
Nameservers
ns-cloud-e1.googledomains.comns-cloud-e2.googledomains.comns-cloud-e3.googledomains.comns-cloud-e4.googledomains.com
Status
client delete prohibitedclient transfer prohibitedclient update prohibited
TLS

SSL Certificate

Live TLS handshake against go.dev. No third-party scanner.

ssl 88 days remaining
Issuer
CN=WR3,O=Google Trust Services,C=US
Subject
CN=go.dev
Valid from
2026-07-26T20:16:42+00:00
Valid to
2026-10-24T21:03:51+00:00
Serial
259858371380808411276742130266939560753
SANs (1)
go.dev
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 24 live · 29 discovered
dns-brute: 0 foundvirustotal: 29 foundrapiddns: 0 foundcertspotter: 20 foundsubfinder: 0 found
  • admin.go.dev 108.177.122.121
  • beta.pkg.go.dev 34.117.180.159
  • blog.go.dev 142.251.16.121
  • dev-pkg.go.dev 34.102.154.129
  • dev-telemetry-worker.go.dev 34.36.103.92
  • dev-telemetry.go.dev 35.190.72.87
  • dev-worker.go.dev 35.186.245.16
  • dev.go.dev 142.250.31.121
  • ecosystem.go.dev 34.111.254.231
  • exp-worker.go.dev 130.211.18.196
  • go.dev 216.239.32.21
  • learn.go.dev 173.194.45.121
  • pkg.go.dev 34.149.140.181
  • play.go.dev 172.253.63.121
  • prod-worker.go.dev 34.120.249.233
  • staging-learn.go.dev 108.177.122.121
  • staging-pkg.go.dev 34.117.157.246
  • staging-worker.go.dev 34.120.230.151
  • staging.go.dev 108.177.122.121
  • talks.go.dev 64.233.180.121
  • telemetry-worker.go.dev 34.117.54.190
  • telemetry.go.dev 34.149.96.102
  • tour.go.dev 142.251.16.121
  • vuln.go.dev 34.117.213.18

+ 5 more seen in CT logs / passive DNS (historical — may be inactive)

Email

Email Security Posture

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

SPF missing
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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