DNS Lookup Tool
Query comprehensive DNS records for any domain. Get A, AAAA, MX, TXT, NS, CAA, SRV, DNSKEY and more.
DNS Records for 
windowsupdate.com
Records: 7
Response Time: 53ms
DNSSEC: Disabled
DNS Provider: 
Azure DNS
Security:
✓ DMARC none
Name Records
Nameservers and aliases
| Type | Name | Value | TTL |
|---|---|---|---|
| NS | windowsupdate.com | ns1-205.azure-dns.com. | 2d |
| NS | windowsupdate.com | ns2-205.azure-dns.net. | 2d |
| NS | windowsupdate.com | ns3-205.azure-dns.org. | 2d |
| NS | windowsupdate.com | ns4-205.azure-dns.info. | 2d |
| SOA | windowsupdate.com | ns1-205.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 2419200 300 | 1h |
Text & Verification
SPF, DKIM, DMARC, and verification
| Type | Name | Value | TTL |
|---|---|---|---|
| TXT | _dmarc.windowsupdate.com | "v=DMARC1; p=none; pct=100; rua=mailto:rua@dmarc.microsoft; ruf=mailto:ruf@dmarc.microsoft; fo=1" | 1h |
Security & Certificates
DNSSEC, CA restrictions, and keys
| Type | Name | Value | TTL |
|---|---|---|---|
| CAA | windowsupdate.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 | 1h |
Queried at 5/10/2026, 9:30:09 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=windowsupdate.com Response for windowsupdate.com Live Data
{
"success": true,
"data": {
"domain": "windowsupdate.com",
"queryTimeMs": 53,
"dnssec": false,
"dnsProvider": "Azure DNS",
"records": [
{
"type": "NS",
"name": "windowsupdate.com",
"value": "ns1-205.azure-dns.com.",
"ttl": 172800
},
{
"type": "NS",
"name": "windowsupdate.com",
"value": "ns2-205.azure-dns.net.",
"ttl": 172800
},
{
"type": "NS",
"name": "windowsupdate.com",
"value": "ns3-205.azure-dns.org.",
"ttl": 172800
},
{
"type": "NS",
"name": "windowsupdate.com",
"value": "ns4-205.azure-dns.info.",
"ttl": 172800
},
{
"type": "SOA",
"name": "windowsupdate.com",
"value": "ns1-205.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 2419200 300",
"ttl": 3600
},
{
"type": "TXT",
"name": "_dmarc.windowsupdate.com",
"value": "\"v=DMARC1; p=none; pct=100; rua=mailto:rua@dmarc.microsoft; ruf=mailto:ruf@dmarc.microsoft; fo=1\"",
"ttl": 3600
},
{
"type": "CAA",
"name": "windowsupdate.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": 3600
}
],
"queriedAt": "2026-05-10T21:30:09.398Z"
}
}