DNS Lookup Tool
Query comprehensive DNS records for any domain. Get A, AAAA, MX, TXT, NS, CAA, SRV, DNSKEY and more.
DNS Records for 
microsoftonline.com
Records: 16
Response Time: 51ms
DNSSEC: Disabled
DNS Provider: 
Azure DNS
Security:
✓ SPF strict
✓ DMARC reject
Mail Records
Mail servers for the domain
| Type | Name | Value | TTL |
|---|---|---|---|
| MX | microsoftonline.com | 10 messaging-microsoft-com.mail.protection.outlook.com. | 1h |
Name Records
Nameservers and aliases
| Type | Name | Value | TTL |
|---|---|---|---|
| NS | microsoftonline.com | ns1-38.azure-dns.com. | 5m |
| NS | microsoftonline.com | ns2-38.azure-dns.net. | 5m |
| NS | microsoftonline.com | ns3-38.azure-dns.org. | 5m |
| NS | microsoftonline.com | ns4-38.azure-dns.info. | 5m |
| SOA | microsoftonline.com | ns1-38.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.microsoftonline.com | "v=DMARC1; p=reject; pct=100; rua=mailto:rua@dmarc.microsoft; ruf=mailto:ruf@dmarc.microsoft; fo=1" | 5m |
| TXT | microsoftonline.com | "v=spf1 ip4:216.32.180.228 include:spfa.microsoftonline.com include:spf-exacttarget.microsoftonline.com include:spf-msods.microsoftonline.com include:spf-mfa.microsoftonline.com include:_spf-ssg-a.microsoft.com -all" | 5m |
| TXT | microsoftonline.com | "google-site-verification=y-tlrGiMNJkBF1UO4Xk0GjbVwYk3p5urCieV9B1sHJ0" | 5m |
| TXT | microsoftonline.com | "google-site-verification=CNZTg2P9nNfuZUJdHTYBONoHbOjMq7UPVvxoqMgomfQ" | 5m |
Security & Certificates
DNSSEC, CA restrictions, and keys
| Type | Name | Value | TTL |
|---|---|---|---|
| CAA | microsoftonline.com | \# 20 00 05 69 73 73 75 65 6d 69 63 72 6f 73 6f 66 74 2e 63 6f 6d | 5m |
| CAA | microsoftonline.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 | microsoftonline.com | \# 18 00 05 69 73 73 75 65 65 6e 74 72 75 73 74 2e 6e 65 74 | 5m |
| CAA | microsoftonline.com | \# 19 00 05 69 73 73 75 65 64 69 67 69 63 65 72 74 2e 63 6f 6d | 5m |
| CAA | microsoftonline.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 | microsoftonline.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 |
Queried at 5/10/2026, 9:31:40 PM
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=microsoftonline.com Response for microsoftonline.com Live Data
{
"success": true,
"data": {
"domain": "microsoftonline.com",
"queryTimeMs": 51,
"dnssec": false,
"dnsProvider": "Azure DNS",
"records": [
{
"type": "MX",
"name": "microsoftonline.com",
"value": "10 messaging-microsoft-com.mail.protection.outlook.com.",
"ttl": 3600
},
{
"type": "NS",
"name": "microsoftonline.com",
"value": "ns1-38.azure-dns.com.",
"ttl": 300
},
{
"type": "NS",
"name": "microsoftonline.com",
"value": "ns2-38.azure-dns.net.",
"ttl": 300
},
{
"type": "NS",
"name": "microsoftonline.com",
"value": "ns3-38.azure-dns.org.",
"ttl": 300
},
{
"type": "NS",
"name": "microsoftonline.com",
"value": "ns4-38.azure-dns.info.",
"ttl": 300
},
{
"type": "SOA",
"name": "microsoftonline.com",
"value": "ns1-38.azure-dns.com. msnhst.microsoft.com. 2017971531 300 120 2419200 60",
"ttl": 3600
},
{
"type": "TXT",
"name": "_dmarc.microsoftonline.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": "microsoftonline.com",
"value": "\"v=spf1 ip4:216.32.180.228 include:spfa.microsoftonline.com include:spf-exacttarget.microsoftonline.com include:spf-msods.microsoftonline.com include:spf-mfa.microsoftonline.com include:_spf-ssg-a.microsoft.com -all\"",
"ttl": 300
},
{
"type": "TXT",
"name": "microsoftonline.com",
"value": "\"google-site-verification=y-tlrGiMNJkBF1UO4Xk0GjbVwYk3p5urCieV9B1sHJ0\"",
"ttl": 300
},
{
"type": "TXT",
"name": "microsoftonline.com",
"value": "\"google-site-verification=CNZTg2P9nNfuZUJdHTYBONoHbOjMq7UPVvxoqMgomfQ\"",
"ttl": 300
},
{
"type": "CAA",
"name": "microsoftonline.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": "microsoftonline.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": "microsoftonline.com",
"value": "\\# 18 00 05 69 73 73 75 65 65 6e 74 72 75 73 74 2e 6e 65 74",
"ttl": 300
},
{
"type": "CAA",
"name": "microsoftonline.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": "microsoftonline.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": "microsoftonline.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
}
],
"queriedAt": "2026-05-10T21:31:40.663Z"
}
}