gt3.dk is a .dk domain served by 2 nameservers (lochlan.ns.cloudflare.com, raquel.ns.cloudflare.com). It was registered on 19 September 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.13.87 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1-dk.centerasecurity.dk, mx2-dk.centerasecurity.dk and 1 more. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 104.21.13.87 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.199.28 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.24 |
| 🔶 Autoconfig | 104.21.13.87 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::ac43:c71c | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:d57 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.13.87,172.67.199.28 ech=AEX+DQBBrAAgACAvQe/2yNFntQmFqE9JRpDNmK4ItovIcqJ9LM87j5hiDwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:c71c,2606:4700:3035::6815:d57 |
| TXT Record |
|---|
| MS=ms27906047 |
| v=spf1 include:_spf.centerasecurity.dk include:spf.protection.outlook.com -all |
| Policy | Record (gt3.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.centerasecurity.dk include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.gt3.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; |
| www | 104.21.13.87 172.67.199.28 2606:4700:3034::ac43:c71c 2606:4700:3035::6815:d57 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 2/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.gt3.dk | dNO6smBiHxM9cKZGMEgLDEHcqMTdAWSOnuJnv4XtgT0 |
| TXT | _acme-challenge.gt3.dk | yTVLIX2XC_w_-tH1bBStfLJ5bpispQJ0DhAzULEQ2I0 |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx1-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| SMTP _25._tcp.mx2-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx2-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| SMTP _25._tcp.mx3-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx3-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2412806443 |
| Primary NS (MNAME) | lochlan.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | CURANET A/S |
| Registered | 2024-09-19 |
| Expires | 2027-09-18 (327d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-23 12:34:58 | 741ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-10-21 22:04:22 | 727ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-10-02 11:48:27 | 605ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-10-01 20:38:01 | 1264ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-30 20:34:35 | 680ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-19 11:25:47 | 5185ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-16 17:42:17 | 2990ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-09 16:14:50 | 1630ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-02 21:18:08 | 927ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-29 11:00:23 | 1241ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-28 08:14:50 | 968ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-27 00:11:31 | 792ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-22 02:20:21 shown | 14229ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-15 21:27:35 | 1784ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-26 11:32:02 | 41309ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-23 03:20:15 | 10454ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-06-30 17:03:39 | 1161ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-06-22 02:55:56 | 809ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-06-17 10:12:32 | 4350ms | 2 NS 2 A 3 MX | 🔒 Secure |