DNS records for substack.com

A records

[
  {
    "type": "A",
    "value": "104.18.37.200"
  },
  {
    "type": "A",
    "value": "172.64.150.56"
  }
]

AAAA records

[
  {
    "type": "AAAA",
    "value": "2606:4700:4400::ac40:9638"
  },
  {
    "type": "AAAA",
    "value": "2606:4700:440b::6812:25c8"
  }
]

MX records

[
  {
    "type": "MX",
    "exchange": "mxa.mailgun.org",
    "priority": 10
  },
  {
    "type": "MX",
    "exchange": "mxb.mailgun.org",
    "priority": 10
  }
]

NS records

[
  {
    "type": "NS",
    "value": "lee.ns.cloudflare.com"
  },
  {
    "type": "NS",
    "value": "ali.ns.cloudflare.com"
  }
]

TXT records

[
  {
    "type": "TXT",
    "entries": [
      "google-site-verification=FfNIQIxsRHpj3Y7E_d3N6GFqGgWDZ-sfYojqCilwtqE"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "google-site-verification=DAkdykID6WqQM6tT7IfSu9_uB7-qIdB039MA_C3T3eA"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "tiktok-developers-site-verification=7PgqCAJ52ILLOqf2KELd8uaRfJpuzaLQ"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "google-site-verification=4V_X38Yf0J4VJcWFwtG38bOS1nkOWeIWJhticlMgNQE"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "tiktok-developers-site-verification=A9XRSo8lWy5CPFJ0bqI04KCpUZGAAq7p"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "v=spf1 include:_spf.google.com include:mailgun.org include:mail.zendesk.com ~all"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "google-site-verification=vQEKLOUDfKNOQAv9W3EUMiRD6e5ibAEPhc2yCzP7big"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "facebook-domain-verification=8vbxp2ntmkudc6is3h5r840c9fwo7f"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "google-site-verification=SXEl7_p4SBszcanSWwVc_3-RFky80c0-94janbeeWI4"
    ]
  }
]

SOA records

[
  {
    "type": "SOA",
    "nsname": "ali.ns.cloudflare.com",
    "hostmaster": "dns.cloudflare.com",
    "serial": 2399990522,
    "refresh": 10000,
    "retry": 2400,
    "expire": 604800,
    "minttl": 1800
  }
]

What does this mean?

These records are pulled live from authoritative DNS at request time and re-validated daily. Use them to debug routing, deliverability, and TLS issues for substack.com.

Related tools: DNS Lookup · SPF Checker · DMARC Lookup