DNS Lookup Tool
Query comprehensive DNS records for any domain. Get A, AAAA, MX, TXT, NS, CAA, SRV, DNSKEY and more.
DNS Records for 
office365.com
Records: 28
Response Time: 52ms
DNSSEC: Enabled
DNS Provider: 
Azure DNS
Security:
✓ SPF soft
✓ DMARC reject
Address Records
IP addresses the domain points to
| Type | Name | Value | TTL |
|---|---|---|---|
| A | office365.com | 20.119.0.28 🇺🇸 US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US | 56m |
| A | office365.com | 40.112.243.53 🇺🇸 US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US | 56m |
Name Records
Nameservers and aliases
| Type | Name | Value | TTL |
|---|---|---|---|
| NS | office365.com | ns1-07.azure-dns.com. | 5m |
| NS | office365.com | ns2-07.azure-dns.net. | 5m |
| NS | office365.com | ns3-07.azure-dns.org. | 5m |
| NS | office365.com | ns4-07.azure-dns.info. | 5m |
| SOA | office365.com | ns1-07.azure-dns.com. msnhst.microsoft.com. 2017971531 300 120 2419200 60 | 1h |
Text & Verification
SPF, DKIM, DMARC, and verification
| Type | Name | Value | TTL |
|---|---|---|---|
| TXT | _dmarc.office365.com | "v=DMARC1; p=reject; pct=100; rua=mailto:rua@dmarc.microsoft; ruf=mailto:ruf@dmarc.microsoft; fo=1" | 5m |
| TXT | office365.com | "officeprodes.azurewebsites.net" | 1s |
| TXT | office365.com | "_ufamlucd6jp7xslb9wnr85vc03dxyqh" | 1s |
| TXT | office365.com | "v=spf1 include:spf.protection.outlook.com ~all" | 1s |
| TXT | office365.com | "google-site-verification=u9PqvuplbTIYlwiMAzJWnRRtHYoAlaTX5GMtRRXqWXA" | 1s |
Security & Certificates
DNSSEC, CA restrictions, and keys
| Type | Name | Value | TTL |
|---|---|---|---|
| CAA | office365.com | \# 35 00 05 69 6f 64 65 66 6d 61 69 6c 74 6f 3a 64 6f 6d 61 69 6e 73 40 6d 69 63 72 6f 73 6f 66 74 2e 63 6f 6d | 5m |
| CAA | office365.com | \# 19 00 05 69 73 73 75 65 64 69 67 69 63 65 72 74 2e 63 6f 6d | 5m |
| CAA | office365.com | \# 21 00 05 69 73 73 75 65 67 6c 6f 62 61 6c 73 69 67 6e 2e 63 6f 6d | 5m |
| CAA | office365.com | \# 20 00 05 69 73 73 75 65 6d 69 63 72 6f 73 6f 66 74 2e 63 6f 6d | 5m |
| CAA | office365.com | \# 42 00 0c 63 6f 6e 74 61 63 74 65 6d 61 69 6c 63 61 61 72 65 63 6f 72 64 61 77 61 72 65 40 6d 69 63 72 6f 73 6f 66 74 2e 63 6f 6d | 5m |
| DNSKEY | office365.com | 256 3 ECDSAP256SHA256 CrsnNg30p80USKaO5qI0qzIcJNVczY3pegh/IAdh/ZvqgROgP/3DTEax8wyBy6jizpIXWTOFZHd/D8AGctMkvg== | 33m |
| DNSKEY | office365.com | 257 3 ECDSAP256SHA256 28AH0fYY5P1qEBOdyrIClhdrW7DQrMSGzWDT7eHaK5cXB8hyjlTJC0GRUsbZVgwVBMvhykVYwI1RioWAN0lWdw== | 33m |
| DS | office365.com | 50849 ECDSAP256SHA256 2 f2f9c480d5c0452ac65bd14631cd9a7bfb6486ea575b6621f44316aadf499b25 | 22h |
Queried at 5/12/2026, 3:13:06 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=office365.com Response for office365.com Live Data
{
"success": true,
"data": {
"domain": "office365.com",
"queryTimeMs": 52,
"dnssec": true,
"dnsProvider": "Azure DNS",
"records": [
{
"type": "46",
"name": "_dmarc.office365.com",
"value": "TXT ECDSAP256SHA256 3 300 1778645577 1778465577 48155 office365.com. vwDaOeTtPwq1Y/C4MnqUXpvEg5FqsrULgquAXH10BvTmVbPEkPflz5n+acJWm9yZdHndpqVpjDRWLTi0oDKFfg==",
"ttl": 300
},
{
"type": "46",
"name": "office365.com",
"value": "A ECDSAP256SHA256 2 3600 1778645350 1778465350 48155 office365.com. hhbhUME4FHsUAoPntCqKPAB1lBJE0VqeJYAmUu2SMKHLhNN+HPMJkYslsDJ+gOz84RsKW9EKyPusEwu4oIhEIA==",
"ttl": 3399
},
{
"type": "46",
"name": "office365.com",
"value": "NS ECDSAP256SHA256 2 300 1778645568 1778465568 48155 office365.com. QpSFGxd/hocPhY9KXv6tGKhP4vw1S2Vm9vxi3DrYlNnfVYfomepgvPz3D0bOJAgmsnEl0jV5pcbZNRYl343h0w==",
"ttl": 300
},
{
"type": "46",
"name": "office365.com",
"value": "SOA ECDSAP256SHA256 2 3600 1778645568 1778465568 48155 office365.com. L2hxLSZhxh1jD15zFP5no1ydKvnY4Ry9sU0QO9aS7bLKLWjZGv+2EBtvx7nF50Tl1qB6nSDqCB/OwM1SjF0WpQ==",
"ttl": 3600
},
{
"type": "46",
"name": "office365.com",
"value": "TXT ECDSAP256SHA256 2 1 1778645582 1778465582 48155 office365.com. 8jG8hnuvEV2WV2bKI+gA5qSTfTeifi0N76f+ct+vR8YD4SPftxhYTxnQcFsAEZabHVnMwFNg5M5WfK37YHv2HA==",
"ttl": 1
},
{
"type": "46",
"name": "office365.com",
"value": "CAA ECDSAP256SHA256 2 300 1778645565 1778465565 48155 office365.com. qiz+d+lyynlVFWxQBXYbemqalhe3rYGGZ18nDgGXlzYaPunbwOvZKlLMkEZq5SJM/F2ff6nfp11+D5yAe/jT+A==",
"ttl": 300
},
{
"type": "46",
"name": "office365.com",
"value": "DNSKEY ECDSAP256SHA256 2 3600 1783278872 1778094872 50849 office365.com. sHcQOutJ5i7e72oSa837c6Wyi8dLwx/ceSzK2aiBjbiqa3a8F6369TkjfyBUiCYjrHcVV/o5tcH39E0sxrBSBw==",
"ttl": 1997
},
{
"type": "46",
"name": "office365.com",
"value": "DS ECDSAP256SHA256 2 86400 1779074028 1778465028 27677 com. b71rbOPVfIEG+hUV/Z/q+0rlNqwTu95rWFE1CU8WDDeTsqTva4NZSbN3NSE1ft1QFU8qdrb11uVkF5eEV7eeYw==",
"ttl": 79826
},
{
"type": "A",
"name": "office365.com",
"value": "20.119.0.28",
"ttl": 3399,
"geo": {
"ip": "20.119.0.28",
"asn": 8075,
"country": "US",
"asnName": "MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US"
}
},
{
"type": "A",
"name": "office365.com",
"value": "40.112.243.53",
"ttl": 3399,
"geo": {
"ip": "40.112.243.53",
"asn": 8075,
"country": "US",
"asnName": "MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US"
}
},
{
"type": "NS",
"name": "office365.com",
"value": "ns1-07.azure-dns.com.",
"ttl": 300
},
{
"type": "NS",
"name": "office365.com",
"value": "ns2-07.azure-dns.net.",
"ttl": 300
},
{
"type": "NS",
"name": "office365.com",
"value": "ns3-07.azure-dns.org.",
"ttl": 300
},
{
"type": "NS",
"name": "office365.com",
"value": "ns4-07.azure-dns.info.",
"ttl": 300
},
{
"type": "SOA",
"name": "office365.com",
"value": "ns1-07.azure-dns.com. msnhst.microsoft.com. 2017971531 300 120 2419200 60",
"ttl": 3600
},
{
"type": "TXT",
"name": "_dmarc.office365.com",
"value": "\"v=DMARC1; p=reject; pct=100; rua=mailto:rua@dmarc.microsoft; ruf=mailto:ruf@dmarc.microsoft; fo=1\"",
"ttl": 300
},
{
"type": "TXT",
"name": "office365.com",
"value": "\"officeprodes.azurewebsites.net\"",
"ttl": 1
},
{
"type": "TXT",
"name": "office365.com",
"value": "\"_ufamlucd6jp7xslb9wnr85vc03dxyqh\"",
"ttl": 1
},
{
"type": "TXT",
"name": "office365.com",
"value": "\"v=spf1 include:spf.protection.outlook.com ~all\"",
"ttl": 1
},
{
"type": "TXT",
"name": "office365.com",
"value": "\"google-site-verification=u9PqvuplbTIYlwiMAzJWnRRtHYoAlaTX5GMtRRXqWXA\"",
"ttl": 1
},
{
"type": "CAA",
"name": "office365.com",
"value": "\\# 35 00 05 69 6f 64 65 66 6d 61 69 6c 74 6f 3a 64 6f 6d 61 69 6e 73 40 6d 69 63 72 6f 73 6f 66 74 2e 63 6f 6d",
"ttl": 300
},
{
"type": "CAA",
"name": "office365.com",
"value": "\\# 19 00 05 69 73 73 75 65 64 69 67 69 63 65 72 74 2e 63 6f 6d",
"ttl": 300
},
{
"type": "CAA",
"name": "office365.com",
"value": "\\# 21 00 05 69 73 73 75 65 67 6c 6f 62 61 6c 73 69 67 6e 2e 63 6f 6d",
"ttl": 300
},
{
"type": "CAA",
"name": "office365.com",
"value": "\\# 20 00 05 69 73 73 75 65 6d 69 63 72 6f 73 6f 66 74 2e 63 6f 6d",
"ttl": 300
},
{
"type": "CAA",
"name": "office365.com",
"value": "\\# 42 00 0c 63 6f 6e 74 61 63 74 65 6d 61 69 6c 63 61 61 72 65 63 6f 72 64 61 77 61 72 65 40 6d 69 63 72 6f 73 6f 66 74 2e 63 6f 6d",
"ttl": 300
},
{
"type": "DNSKEY",
"name": "office365.com",
"value": "256 3 ECDSAP256SHA256 CrsnNg30p80USKaO5qI0qzIcJNVczY3pegh/IAdh/ZvqgROgP/3DTEax8wyBy6jizpIXWTOFZHd/D8AGctMkvg==",
"ttl": 1997
},
{
"type": "DNSKEY",
"name": "office365.com",
"value": "257 3 ECDSAP256SHA256 28AH0fYY5P1qEBOdyrIClhdrW7DQrMSGzWDT7eHaK5cXB8hyjlTJC0GRUsbZVgwVBMvhykVYwI1RioWAN0lWdw==",
"ttl": 1997
},
{
"type": "DS",
"name": "office365.com",
"value": "50849 ECDSAP256SHA256 2 f2f9c480d5c0452ac65bd14631cd9a7bfb6486ea575b6621f44316aadf499b25",
"ttl": 79826
}
],
"queriedAt": "2026-05-12T03:13:06.241Z"
}
}