matematikkensverden.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 13 February 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.254.168.193 is hosted by Aarhus Business College (AS51073) in Denmark. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns.efif.dk | 195.254.168.23 | ns.efif.dk | AS51073 Aarhus Business College |
| ns2.efif.dk | 195.254.168.12 | ns2.efif.dk | AS51073 Aarhus Business College |
| ns3.efif.dk | 20.23.170.35 | — | AS8075 Microsoft Corporation |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 195.254.168.193 | 3600s | — | AS51073 | Aarhus Business College | 195.254.168.0/23 | 🇩🇰 Denmark | Viby J |
| TXT Record |
|---|
| AK |
| www CNAME | ak-ven-web-02.efif.dk (all on efif.dk) |
| www vs bare domain | www does not resolve (all like this) |
| 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 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2016011022 |
| Primary NS (MNAME) | ns.efif.dk |
| Responsible (RNAME) | dns-zc@efif.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2017-02-13 |
| Expires | 2027-02-28 (127d) |
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).
Showing 100 of 138.
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-20 04:43:58 shown | 398ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-16 02:18:37 | 2921ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-13 19:28:53 | 479ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-11 17:41:32 | 430ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-09 02:38:40 | 3219ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 02:24:43 | 1836ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-04 00:36:54 | 344ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-03 00:35:40 | 544ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-01 00:20:20 | 449ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-29 02:35:53 | 1852ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-27 01:59:56 | 2939ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-25 01:30:11 | 1658ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-21 23:11:45 | 1691ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-18 22:28:30 | 6982ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-11 20:31:44 | 6814ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-04 18:36:58 | 501ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-31 05:29:37 | 499ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-26 12:55:51 | 408ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-25 04:59:09 | 4266ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-19 01:52:33 | 5033ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-13 15:48:58 | 5843ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-10 23:04:41 | 8491ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-09 15:43:45 | 8606ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-07 04:57:28 | 3594ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-27 05:06:06 | 8517ms | 3 NS 1 A 0 MX | 🔒 Secure |