roskildekatedralskole.dk is a .dk domain served by 2 nameservers (ns07.sac-it.dk, ns08.sac-it.dk). It was registered on 8 April 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 76.76.21.21 is hosted by Amazon.com, Inc. (AS16509) in United States. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|
| ns07.sac-it.dk | 85.235.243.63 | ns07.sac-it.dk | AS3308 Norlys Telco A/S |
| ns08.sac-it.dk | 128.76.60.63 | ns08.sac-it.dk | AS3292 TDC Holding A/S |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 76.76.21.21 | 600s | — | AS16509 | Amazon.com, Inc. | 76.76.21.0/24 | 🇺🇸 United States | Walnut |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026100801 |
| Primary NS (MNAME) | ns07.sac-it.dk |
| Responsible (RNAME) | hostmaster@roskildekatedralskole.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | SAC-IT A/S |
| Registered | 2006-04-08 |
| Expires | 2031-04-30 (1645d) |
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 |
|---|---|
| rks-gym.dk | SAC-IT A/S |
| rksradar.dk | Punktum dk A/S (direct) |
| roskildekat-gym.dk | SAC-IT A/S |
| srpradar.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 03:37:28 | 2035ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-15 11:47:22 | 1394ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-09 01:26:31 shown | 1379ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 01:25:03 | 525ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-03 11:53:52 | 504ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-02 00:25:40 | 530ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-25 23:06:02 | 650ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-24 12:31:06 | 525ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-19 04:34:16 | 708ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-16 00:39:16 | 528ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-05 02:00:57 | 673ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-27 18:58:29 | 384ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-20 18:04:31 | 2583ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-14 01:20:13 | 505ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-07 11:10:55 | 515ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-01 10:30:12 | 619ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-23 06:10:50 | 2406ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-18 03:30:49 | 519ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-10 12:58:59 | 9503ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-03 10:43:56 | 446ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-25 14:50:46 | 367ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-18 04:47:42 | 647ms | 2 NS 1 A 0 MX | 🔒 Secure |