gbc72.dk is a .dk domain served by 2 nameservers (duke.ns.cloudflare.com, kiki.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.29.88 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.klubmodul.dk. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.29.88 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.148.179 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.klubmodul.dk | 84.19.174.82 | mail.klubmodul.dk | AS31103 Keyweb AG |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.29.88 |
| 🔶 Autoconfig | 104.21.29.88 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::6815:1d58 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3032::ac43:94b3 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.29.88,172.67.148.179 ech=AEX+DQBBdAAgACDVWeWVwnXIEPPfnSSJHCg/uQ9YKjSh047ycADFH6t/DwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:1d58,2606:4700:3032::ac43:94b3 |
| TXT Record |
|---|
| v=spf1 mx a a:mail2.klubmodul.dk -all |
| Policy | Record (gbc72.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx a a:mail2.klubmodul.dk -all |
| Policy | Record (_dmarc.gbc72.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:dmarc@klubmodul.dk; ruf=mailto:dmarc@klubmodul.dk; fo=0:1; adkim=s; aspf=s |
| www | 104.21.29.88 172.67.148.179 2606:4700:3032::6815:1d58 2606:4700:3032::ac43:94b3 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 3/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2410986977 |
| Primary NS (MNAME) | duke.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 19:31:10 | 523ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-29 13:11:41 | 2339ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-28 12:58:48 | 2192ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-19 00:38:51 | 2538ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-12 11:46:57 | 1238ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-27 08:29:54 | 785ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 02:26:21 | 2546ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-07 17:25:46 shown | 2462ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-02 08:03:34 | 1666ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-28 10:57:37 | 702ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 09:33:30 | 1448ms | 2 NS 1 A 1 MX | ⚠️ Bogus |