katedralskolen.dk is a .dk domain served by 2 nameservers (ns3.supportcenter.dk, ns4.supportcenter.dk). It was registered on 18 March 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.235.58.95 is hosted by LeaseWeb Netherlands B.V. (AS60781) in The Netherlands. Mail is handled by dk.mx1.mailanyone.net, dk.mx2.mx25.net and 2 more. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns3.supportcenter.dk | 87.54.32.150 | — | AS3292 TDC Holding A/S |
| ns4.supportcenter.dk | 2.106.7.200 | ns4.supportcenter.dk | AS3292 TDC Holding A/S |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 77.235.58.95 | 3600s | — | AS60781 | LeaseWeb Netherlands B.V. | 77.235.56.0/21 | 🇳🇱 The Netherlands | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.8 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| have-i-been-pwned-verification=dweb_2qq6omfj6ltmdixdb6ohlo6e |
| MS=ms52980828 |
| sY+LNY68R8jNWuQxMOTEqCZ4NLym9k0yLzk+UNzSQZHvv8OQCu7AltgJ9XUAAW0fuQpKwZJxF6kESGJK+db05Q== |
| v=spf1 ip4:87.54.32.251 include:spf.protection.outlook.com include:spf.mailanyone.net -all |
| Policy | Record (katedralskolen.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:87.54.32.251 include:spf.protection.outlook.com include:spf.mailanyone.net -all |
| Policy | Record (_dmarc.katedralskolen.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:6073f6b2c01db@ag.dmarcly.com; ruf=mailto:6073f6b2c01db@fo.dmarcly.com; sp=reject; fo=1; |
| www CNAME | katedralskolen.dk (all on katedralskolen.dk) → 77.235.58.95 (AS60781) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 50 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 2/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 1021 |
| Primary NS (MNAME) | ns3.supportcenter.dk |
| Responsible (RNAME) | hostmaster@supportcenter.dk |
| Refresh | 900s |
| Retry | 600s |
| Expire | 86400s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2015-03-18 |
| Expires | 2032-03-31 (1985d) |
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).
| Domain | Registrar |
|---|---|
| aalborg-katedralskole.dk | Punktum dk A/S (direct) |
| aalborgkatedralskole.dk | Punktum dk A/S (direct) |
| aalkat-gym.dk | Punktum dk A/S (direct) |
| katedralskole.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 20:13:06 | 742ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-20 15:32:11 | 762ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-19 15:30:27 | 3932ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-17 13:56:50 | 793ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-16 13:19:14 | 1528ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-15 11:56:30 | 4704ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-13 06:45:25 | 1273ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-12 06:06:42 | 1937ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-11 04:35:15 | 924ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-08 23:57:20 | 3716ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-07 23:54:50 | 1463ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-06 23:50:35 | 773ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-04 21:58:41 | 737ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-03 21:56:13 | 806ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-01 21:55:20 | 1652ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-30 21:52:58 | 718ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-30 06:07:41 | 2541ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-29 05:57:43 | 1957ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-28 05:23:43 | 1876ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-27 04:59:49 | 1390ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-26 04:38:43 | 789ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-26 03:33:46 | 2192ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-25 02:35:09 | 1281ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-24 01:46:44 | 967ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-21 00:32:39 | 1372ms | 2 NS 1 A 4 MX | 🔒 Secure |