DNS records for fbcdn.net

Findings

[INFO] An SPF record is published but no MX records are present. This is normal for send-only domains but worth confirming if you expect to receive mail.

A records

[
  {
    "type": "A",
    "value": "57.144.220.1"
  }
]

AAAA records

[
  {
    "type": "AAAA",
    "value": "2a03:2880:f36e:1:face:b00c:0:25de"
  }
]

NS records

[
  {
    "type": "NS",
    "value": "a.ns.facebook.com"
  },
  {
    "type": "NS",
    "value": "c.ns.facebook.com"
  },
  {
    "type": "NS",
    "value": "b.ns.facebook.com"
  },
  {
    "type": "NS",
    "value": "d.ns.facebook.com"
  }
]

TXT records

[
  {
    "type": "TXT",
    "entries": [
      "v=spf1 a ~all"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "google-site-verification=fK7K3F-hT-Pre47WNaVLRyk-_nC0Kc7K-IzagA5gPEw"
    ]
  }
]

SOA records

[
  {
    "type": "SOA",
    "nsname": "a.ns.facebook.com",
    "hostmaster": "dns.facebook.com",
    "serial": 4207849484,
    "refresh": 14400,
    "retry": 1800,
    "expire": 604800,
    "minttl": 300
  }
]

CAA records

[
  {
    "type": "CAA",
    "critical": 0,
    "tag": "issue",
    "value": "digicert.com; account=271b0beda0771d006aa3a6c11b05187d456d6c239b46cb5241196095b09c92af"
  }
]

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 fbcdn.net.

Related tools: DNS Lookup · SPF Checker · DMARC Lookup