DNS Lookup Tool

Query comprehensive DNS records for any domain. Get A, AAAA, MX, TXT, NS, CAA, SRV, DNSKEY and more.

Try:

RequestGuard

DNS Records for stackoverflow.com

Records: 45

Response Time: 20ms

DNSSEC: Disabled

DNS Provider:

Cloudflare

Security: ✓ SPF soft ✓ DMARC reject

Address Records

IP addresses the domain points to

1 record

Type	Name	Value	TTL
A	stackoverflow.com	198.252.206.1 🇺🇸 US AS13335 CLOUDFLARENET - Cloudflare, Inc., US	5m

Mail Records

Mail servers for the domain

5 records

Type	Name	Value	TTL
MX	stackoverflow.com	1 aspmx.l.google.com.	5m
MX	stackoverflow.com	10 alt3.aspmx.l.google.com.	5m
MX	stackoverflow.com	10 alt4.aspmx.l.google.com.	5m
MX	stackoverflow.com	5 alt1.aspmx.l.google.com.	5m
MX	stackoverflow.com	5 alt2.aspmx.l.google.com.	5m

Name Records

Nameservers and aliases

3 records

Type	Name	Value	TTL
NS	stackoverflow.com	damian.ns.cloudflare.com.	1d
NS	stackoverflow.com	sureena.ns.cloudflare.com.	1d
SOA	stackoverflow.com	damian.ns.cloudflare.com. dns.cloudflare.com. 2403737794 10000 2400 604800 1800	30m

Text & Verification

SPF, DKIM, DMARC, and verification

22 records

Type	Name	Value	TTL
TXT	_dmarc.stackoverflow.com	"v=DMARC1; p=reject; pct=100; rua=mailto:dmarc-aggregates@stackoverflow.com; ruf=mailto:dmarc-forensics@stackoverflow.com; fo=1"	5m
TXT	stackoverflow.com	"MS=ms52592611"	5m
TXT	stackoverflow.com	"ZOOM_verify_AbkNwz5bBl0eurcDKyhhuk"	5m
TXT	stackoverflow.com	"adobe-idp-site-verification=25ba5203f3687c9cd6ee3223ee5de1528917828d1da3ebd3bd9a44094cbfc4ac"	5m
TXT	stackoverflow.com	"anthropic-domain-verification-q70207=cKyy0llXkD10O4rDQpWz8tQ5K"	5m
TXT	stackoverflow.com	"apple-domain-verification=O9jlnJXAQ7sNSZqC"	5m
TXT	stackoverflow.com	"atlassian-domain-verification=byLeZgl3MIcfOqwWuMhq8Fhr/1zem/jIaouJegvDZbBKUU5OqhwDjdpkyYg5CTzm"	5m
TXT	stackoverflow.com	"cursor-domain-verification-sb0ayf=Pk6AyptQuTpzpcuSlfYGWloxv"	5m
TXT	stackoverflow.com	"docker-verification=d65aee54-9091-4ceb-b792-61f5d5804050"	5m
TXT	stackoverflow.com	"docusign=4262531d-29f4-4a62-9f33-ae9f66f5247b"	5m
TXT	stackoverflow.com	"google-site-verification=2Bi6SYw5skkRexdtdLPL2gpxeIhLxnYVqITVP9Htl3w"	5m
TXT	stackoverflow.com	"google-site-verification=ctogLnZNAdc_CXq8yOhODMLpmugGynjxKecKHDz4oL8"	5m
TXT	stackoverflow.com	"google-site-verification=o3EMam8yBGo1yEjyybIiZcOunGHOQKpo8JmOtp9n1BU"	5m
TXT	stackoverflow.com	"google-site-verification=rdWtMbplKjbRHGr2dNONfwkqithlUvjr3u6i8QEz_mo"	5m
TXT	stackoverflow.com	"ibmid=4e7cbbb3-5f12-40b4-96c7-5b064347b822"	5m
TXT	stackoverflow.com	"make-domain-verification=eec31159-f381-4f38-9d89-e59123dd023e"	5m
TXT	stackoverflow.com	"onetrust-domain-verification=0d9d67f856334905a54256085a5768b3"	5m
TXT	stackoverflow.com	"onetrust-domain-verification=e445562296a64c649ae3d520230b8c4c"	5m
TXT	stackoverflow.com	"openai-domain-verification=dv-GLNufzbWDzAq0fDXHD6jxeCK"	5m
TXT	stackoverflow.com	"profound-domain-verification-5p599x=hWudYd2Du6WOYOod5ko9Rwnp8"	5m
TXT	stackoverflow.com	"v=MCPv1; k=ed25519; p=VhBofO8RaYvTvHT7q5tTty+HQeCU8R6h5Y8k/sj20So="	5m
TXT	stackoverflow.com	"v=spf1 ip4:52.38.191.241 include:_spf1.stackoverflow.com ~all"	5m

Service Discovery

Service endpoints and bindings

1 record

Type	Name	Value	TTL
HTTPS	stackoverflow.com	\# 18 00 01 00 00 01 00 03 02 68 32 00 04 00 04 c6 fc ce 01	5m

Security & Certificates

DNSSEC, CA restrictions, and keys

13 records

Type	Name	Value	TTL
CAA	stackoverflow.com	\# 19 00 05 69 73 73 75 65 63 6f 6d 6f 64 6f 63 61 2e 63 6f 6d	5m
CAA	stackoverflow.com	\# 45 00 05 69 73 73 75 65 64 69 67 69 63 65 72 74 2e 63 6f 6d 3b 20 63 61 6e 73 69 67 6e 68 74 74 70 65 78 63 68 61 6e 67 65 73 3d 79 65 73	5m
CAA	stackoverflow.com	\# 22 00 05 69 73 73 75 65 6c 65 74 73 65 6e 63 72 79 70 74 2e 6f 72 67	5m
CAA	stackoverflow.com	\# 41 00 05 69 73 73 75 65 70 6b 69 2e 67 6f 6f 67 3b 20 63 61 6e 73 69 67 6e 68 74 74 70 65 78 63 68 61 6e 67 65 73 3d 79 65 73	5m
CAA	stackoverflow.com	\# 18 00 05 69 73 73 75 65 73 65 63 74 69 67 6f 2e 63 6f 6d	5m
CAA	stackoverflow.com	\# 14 00 05 69 73 73 75 65 73 73 6c 2e 63 6f 6d	5m
CAA	stackoverflow.com	\# 23 00 09 69 73 73 75 65 77 69 6c 64 63 6f 6d 6f 64 6f 63 61 2e 63 6f 6d	5m
CAA	stackoverflow.com	\# 49 00 09 69 73 73 75 65 77 69 6c 64 64 69 67 69 63 65 72 74 2e 63 6f 6d 3b 20 63 61 6e 73 69 67 6e 68 74 74 70 65 78 63 68 61 6e 67 65 73 3d 79 65 73	5m
CAA	stackoverflow.com	\# 26 00 09 69 73 73 75 65 77 69 6c 64 6c 65 74 73 65 6e 63 72 79 70 74 2e 6f 72 67	5m
CAA	stackoverflow.com	\# 45 00 09 69 73 73 75 65 77 69 6c 64 70 6b 69 2e 67 6f 6f 67 3b 20 63 61 6e 73 69 67 6e 68 74 74 70 65 78 63 68 61 6e 67 65 73 3d 79 65 73	5m
CAA	stackoverflow.com	\# 22 00 09 69 73 73 75 65 77 69 6c 64 73 65 63 74 69 67 6f 2e 63 6f 6d	5m
CAA	stackoverflow.com	\# 18 00 09 69 73 73 75 65 77 69 6c 64 73 73 6c 2e 63 6f 6d	5m
CAA	stackoverflow.com	\# 45 80 05 69 6f 64 65 66 6d 61 69 6c 74 6f 3a 73 79 73 61 64 6d 69 6e 2d 74 65 61 6d 40 73 74 61 63 6b 6f 76 65 72 66 6c 6f 77 2e 63 6f 6d	5m

Queried at 5/12/2026, 8:52:40 AM

About DNS Records

The Domain Name System (DNS) is the internet's phonebook, translating human-readable domain names into IP addresses. DNS records contain essential configuration for how a domain behaves across email, web, security, and services.

Common Records

A/AAAA - Map domain to IPv4/IPv6 addresses
MX - Mail servers for receiving email
TXT - SPF, DKIM, DMARC for email security
NS - Authoritative nameservers
CNAME - Aliases pointing to other domains

Security Records

CAA - Restrict which CAs can issue certificates
DNSKEY/DS - DNSSEC cryptographic keys
TLSA - DANE TLS certificate authentication
SSHFP - SSH host key fingerprints
SRV - Service discovery and endpoints

REST API

Integrate DNS lookups into your applications with our REST API. Query all record types programmatically.

GET DNS Lookup

$ curl https://api.requestguard.com/v1/dns/lookup?domain=stackoverflow.com

Response for stackoverflow.com Live Data

{
  "success": true,
  "data": {
    "domain": "stackoverflow.com",
    "queryTimeMs": 20,
    "dnssec": false,
    "dnsProvider": "Cloudflare",
    "records": [
      {
        "type": "A",
        "name": "stackoverflow.com",
        "value": "198.252.206.1",
        "ttl": 300,
        "geo": {
          "ip": "198.252.206.1",
          "asn": 13335,
          "country": "US",
          "asnName": "CLOUDFLARENET - Cloudflare, Inc., US"
        }
      },
      {
        "type": "MX",
        "name": "stackoverflow.com",
        "value": "1 aspmx.l.google.com.",
        "ttl": 300
      },
      {
        "type": "MX",
        "name": "stackoverflow.com",
        "value": "10 alt3.aspmx.l.google.com.",
        "ttl": 300
      },
      {
        "type": "MX",
        "name": "stackoverflow.com",
        "value": "10 alt4.aspmx.l.google.com.",
        "ttl": 300
      },
      {
        "type": "MX",
        "name": "stackoverflow.com",
        "value": "5 alt1.aspmx.l.google.com.",
        "ttl": 300
      },
      {
        "type": "MX",
        "name": "stackoverflow.com",
        "value": "5 alt2.aspmx.l.google.com.",
        "ttl": 300
      },
      {
        "type": "NS",
        "name": "stackoverflow.com",
        "value": "damian.ns.cloudflare.com.",
        "ttl": 86400
      },
      {
        "type": "NS",
        "name": "stackoverflow.com",
        "value": "sureena.ns.cloudflare.com.",
        "ttl": 86400
      },
      {
        "type": "SOA",
        "name": "stackoverflow.com",
        "value": "damian.ns.cloudflare.com. dns.cloudflare.com. 2403737794 10000 2400 604800 1800",
        "ttl": 1800
      },
      {
        "type": "TXT",
        "name": "_dmarc.stackoverflow.com",
        "value": "\"v=DMARC1; p=reject; pct=100; rua=mailto:dmarc-aggregates@stackoverflow.com; ruf=mailto:dmarc-forensics@stackoverflow.com; fo=1\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"MS=ms52592611\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"ZOOM_verify_AbkNwz5bBl0eurcDKyhhuk\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"adobe-idp-site-verification=25ba5203f3687c9cd6ee3223ee5de1528917828d1da3ebd3bd9a44094cbfc4ac\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"anthropic-domain-verification-q70207=cKyy0llXkD10O4rDQpWz8tQ5K\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"apple-domain-verification=O9jlnJXAQ7sNSZqC\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"atlassian-domain-verification=byLeZgl3MIcfOqwWuMhq8Fhr/1zem/jIaouJegvDZbBKUU5OqhwDjdpkyYg5CTzm\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"cursor-domain-verification-sb0ayf=Pk6AyptQuTpzpcuSlfYGWloxv\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"docker-verification=d65aee54-9091-4ceb-b792-61f5d5804050\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"docusign=4262531d-29f4-4a62-9f33-ae9f66f5247b\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"google-site-verification=2Bi6SYw5skkRexdtdLPL2gpxeIhLxnYVqITVP9Htl3w\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"google-site-verification=ctogLnZNAdc_CXq8yOhODMLpmugGynjxKecKHDz4oL8\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"google-site-verification=o3EMam8yBGo1yEjyybIiZcOunGHOQKpo8JmOtp9n1BU\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"google-site-verification=rdWtMbplKjbRHGr2dNONfwkqithlUvjr3u6i8QEz_mo\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"ibmid=4e7cbbb3-5f12-40b4-96c7-5b064347b822\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"make-domain-verification=eec31159-f381-4f38-9d89-e59123dd023e\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"onetrust-domain-verification=0d9d67f856334905a54256085a5768b3\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"onetrust-domain-verification=e445562296a64c649ae3d520230b8c4c\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"openai-domain-verification=dv-GLNufzbWDzAq0fDXHD6jxeCK\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"profound-domain-verification-5p599x=hWudYd2Du6WOYOod5ko9Rwnp8\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"v=MCPv1; k=ed25519; p=VhBofO8RaYvTvHT7q5tTty+HQeCU8R6h5Y8k/sj20So=\"",
        "ttl": 300
      },
      {
        "type": "TXT",
        "name": "stackoverflow.com",
        "value": "\"v=spf1 ip4:52.38.191.241 include:_spf1.stackoverflow.com ~all\"",
        "ttl": 300
      },
      {
        "type": "HTTPS",
        "name": "stackoverflow.com",
        "value": "\\# 18 00 01 00 00 01 00 03 02 68 32 00 04 00 04 c6 fc ce 01",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 19 00 05 69 73 73 75 65 63 6f 6d 6f 64 6f 63 61 2e 63 6f 6d",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 45 00 05 69 73 73 75 65 64 69 67 69 63 65 72 74 2e 63 6f 6d 3b 20 63 61 6e 73 69 67 6e 68 74 74 70 65 78 63 68 61 6e 67 65 73 3d 79 65 73",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 22 00 05 69 73 73 75 65 6c 65 74 73 65 6e 63 72 79 70 74 2e 6f 72 67",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 41 00 05 69 73 73 75 65 70 6b 69 2e 67 6f 6f 67 3b 20 63 61 6e 73 69 67 6e 68 74 74 70 65 78 63 68 61 6e 67 65 73 3d 79 65 73",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 18 00 05 69 73 73 75 65 73 65 63 74 69 67 6f 2e 63 6f 6d",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 14 00 05 69 73 73 75 65 73 73 6c 2e 63 6f 6d",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 23 00 09 69 73 73 75 65 77 69 6c 64 63 6f 6d 6f 64 6f 63 61 2e 63 6f 6d",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 49 00 09 69 73 73 75 65 77 69 6c 64 64 69 67 69 63 65 72 74 2e 63 6f 6d 3b 20 63 61 6e 73 69 67 6e 68 74 74 70 65 78 63 68 61 6e 67 65 73 3d 79 65 73",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 26 00 09 69 73 73 75 65 77 69 6c 64 6c 65 74 73 65 6e 63 72 79 70 74 2e 6f 72 67",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 45 00 09 69 73 73 75 65 77 69 6c 64 70 6b 69 2e 67 6f 6f 67 3b 20 63 61 6e 73 69 67 6e 68 74 74 70 65 78 63 68 61 6e 67 65 73 3d 79 65 73",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 22 00 09 69 73 73 75 65 77 69 6c 64 73 65 63 74 69 67 6f 2e 63 6f 6d",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 18 00 09 69 73 73 75 65 77 69 6c 64 73 73 6c 2e 63 6f 6d",
        "ttl": 300
      },
      {
        "type": "CAA",
        "name": "stackoverflow.com",
        "value": "\\# 45 80 05 69 6f 64 65 66 6d 61 69 6c 74 6f 3a 73 79 73 61 64 6d 69 6e 2d 74 65 61 6d 40 73 74 61 63 6b 6f 76 65 72 66 6c 6f 77 2e 63 6f 6d",
        "ttl": 300
      }
    ],
    "queriedAt": "2026-05-12T08:52:40.673Z"
  }
}

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