geocenter-köbenhavn.dk is a .dk domain served by 2 nameservers (fatima.ns.cloudflare.com, ryan.ns.cloudflare.com). It was registered on 1 February 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.18.40 is hosted by Cloudflare, Inc. (AS13335). The zone is DNSSEC-signed and validates, has no DMARC policy and is reachable over IPv6. Below are all of its DNS records from our latest 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 |
|---|---|---|---|---|---|---|---|
| 104.21.18.40 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.180.91 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.180.91 |
| 🔶 Autoconfig | 172.67.180.91 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::ac43:b45b | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:1228 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.18.40,172.67.180.91 ech=AEX+DQBB4wAgACCtq4wkNTyyG5zVQKjnjbjYCsoMgwEoHa8rCGYhSxbMSAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::ac43:b45b,2606:4700:3035::6815:1228 |
| www | 104.21.18.40 172.67.180.91 2606:4700:3032::ac43:b45b 2606:4700:3035::6815:1228 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network geocenter-köbenhavn.dk: 188.114.96.1 188.114.97.1 2606:4700:3032::ac43:b45b 2606:4700:3035::6815:1228 (AS13335) www.geocenter-köbenhavn.dk: 104.21.18.40 172.67.180.91 2606:4700:3032::ac43:b45b 2606:4700:3035::6815:1228 (AS13335) |
| 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 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2415879102 |
| Primary NS (MNAME) | fatima.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2004-02-01 |
| Expires | 2027-02-28 (130d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 09:11:05 shown | 547ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-09-30 14:20:09 | 521ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-09-27 05:32:54 | 1079ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-09-21 11:18:59 | 666ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-09-03 18:54:54 | 881ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-27 11:09:26 | 574ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-26 10:53:07 | 644ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-23 03:12:45 | 8114ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-09 20:14:48 | 855ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-07-19 18:00:46 | 9899ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-07-17 13:22:35 | 17610ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-06-25 17:07:23 | 753ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-06-22 17:00:27 | 723ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 20:41:16 | 1168ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 10:09:16 | 1962ms | 2 NS 2 A 0 MX | 🔒 Secure |