ismester.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 1 September 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.254.168.52 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 this 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 |
|---|---|---|---|---|---|---|---|
| 195.254.168.52 | 86400s | cphbusiness.dk ek.dk keanet.dk kompetence.kea.dk redirect.efif.dk |
AS51073 | Aarhus Business College | 195.254.168.0/23 | 🇩🇰 Denmark | Højbjerg |
| www CNAME | ismester.dk (all on ismester.dk) |
| 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 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2016011026 |
| 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 | 2015-09-01 |
| Expires | 2027-09-30 (348d) |
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 |
|---|---|---|---|
| 2026-10-15 09:51:08 | 6144ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-15 09:49:44 | 2438ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-14 08:04:17 | 365ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 03:46:05 | 726ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-07 03:45:06 | 1280ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-02 21:30:26 | 463ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-27 21:05:12 | 575ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-25 20:29:40 | 8774ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-23 17:36:08 | 479ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-15 13:38:16 | 2010ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-08 11:24:57 shown | 376ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-03 18:31:16 | 390ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-30 15:30:08 | 1634ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-27 21:53:34 | 484ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-25 04:25:38 | 1901ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-21 01:31:06 | 6454ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-19 00:44:28 | 5517ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-17 21:47:41 | 2277ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-12 12:34:34 | 2228ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-08 07:08:09 | 2531ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-03 17:59:18 | 3197ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-31 23:34:10 | 4644ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-27 01:18:46 | 2137ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-23 19:04:39 | 4568ms | 3 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-22 18:19:43 | 8700ms | 3 NS 1 A 0 MX | 🔒 Secure |