DNS records for outlook.com

A records

[
  {
    "type": "A",
    "value": "52.96.222.226"
  },
  {
    "type": "A",
    "value": "52.96.222.194"
  },
  {
    "type": "A",
    "value": "52.96.91.34"
  },
  {
    "type": "A",
    "value": "52.96.229.242"
  },
  {
    "type": "A",
    "value": "52.96.228.130"
  },
  {
    "type": "A",
    "value": "52.96.214.50"
  },
  {
    "type": "A",
    "value": "52.96.172.98"
  },
  {
    "type": "A",
    "value": "52.96.223.2"
  },
  {
    "type": "A",
    "value": "52.96.111.82"
  }
]

MX records

[
  {
    "type": "MX",
    "exchange": "outlook-com.olc.protection.outlook.com",
    "priority": 5
  }
]

NS records

[
  {
    "type": "NS",
    "value": "ns3-05.azure-dns.org"
  },
  {
    "type": "NS",
    "value": "ns2-05.azure-dns.net"
  },
  {
    "type": "NS",
    "value": "ns1-05.azure-dns.com"
  },
  {
    "type": "NS",
    "value": "ns4-05.azure-dns.info"
  }
]

TXT records

[
  {
    "type": "TXT",
    "entries": [
      "google-site-verification=u61khn2j2qt8IdrjskRMSZ0p_HaFURXKrSsu-uXKyNA"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "google-site-verification=0iLWhIMhXEkeWwWfFU4ursTn-_OvoOjaA0Lr7Pg1sEM"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "_ofl74f250a84g188pro5arwqa23zle2"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "v=spf1 include:spf2.outlook.com -all"
    ]
  },
  {
    "type": "TXT",
    "entries": [
      "google-site-verification=DC2uC-T8kD33lINhNzfo0bNBrw-vrCXs5BPF5BXY56g"
    ]
  }
]

SOA records

[
  {
    "type": "SOA",
    "nsname": "ns1-05.azure-dns.com",
    "hostmaster": "msnhst.microsoft.com",
    "serial": 2017971531,
    "refresh": 300,
    "retry": 120,
    "expire": 2419200,
    "minttl": 60
  }
]

CAA records

[
  {
    "type": "CAA",
    "critical": 0,
    "tag": "issue",
    "value": "globalsign.com"
  },
  {
    "type": "CAA",
    "critical": 0,
    "tag": "iodef",
    "value": "mailto:[email protected]"
  },
  {
    "type": "CAA",
    "critical": 0,
    "tag": "unknown",
    "value": ""
  },
  {
    "type": "CAA",
    "critical": 0,
    "tag": "issue",
    "value": "digicert.com"
  },
  {
    "type": "CAA",
    "critical": 0,
    "tag": "issue",
    "value": "entrust.net"
  },
  {
    "type": "CAA",
    "critical": 0,
    "tag": "issue",
    "value": "microsoft.com"
  }
]

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 outlook.com.

Related tools: DNS Lookup · SPF Checker · DMARC Lookup