ism.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 18 December 1996 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 172.232.147.252 is hosted by Akamai Connected Cloud (AS63949) in Sweden. Mail is handled by .. The zone is DNSSEC-signed and validates, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 172.232.147.252 | 43200s | 172-232-147-252.ip.linodeusercontent.com | AS63949 | Akamai Connected Cloud | 172.232.128.0/17 | 🇸🇪 Sweden | Stockholm |
| 172.233.57.17 | 3600s | 172-233-57-17.ip.linodeusercontent.com | AS63949 | Akamai Connected Cloud | 172.233.0.0/16 | 🇳🇱 The Netherlands | Amsterdam |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2600:3c09::f03c:94ff:fed1:f1bb | 3600s | — | AS63949 | Akamai Connected Cloud | 2600:3c08:0:0:0:0:0:0/30 | 🇸🇪 Sweden | Stockholm |
| 2600:3c0e::f03c:94ff:fed1:4ea | 3600s | — | AS63949 | Akamai Connected Cloud | 2600:3c0e:0:0:0:0:0:0/32 | 🇳🇱 The Netherlands | Amsterdam |
| Policy | Record (_dmarc.ism.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject |
| www CNAME | www.ism.dk.edgekey.net (all on edgekey.net) |
| www vs bare domain | Different networks ism.dk: 172.232.147.252 172.233.57.17 2600:3c09::f03c:94ff:fed1:f1bb 2600:3c0e::f03c:94ff:fed1:4ea (AS63949) (all like this)www.ism.dk: 95.100.155.123 95.100.155.208 2a02:26f0:3b::5f64:9b7b 2a02:26f0:3b::5f64:9bd0 (AS20940) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.ism.dk | 7E8dlLrn3ibDzHiAbejWJnUoxOTZCsD5-YmsVPqZpcE |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101201 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1996-12-18 |
| Expires | 2030-12-31 (1536d) |
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 |
|---|---|---|---|
| 2026-10-13 02:01:54 shown | 422ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-09 14:51:48 | 470ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-29 15:41:13 | 1431ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-13 10:25:08 | 738ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-04 16:41:42 | 578ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-27 11:34:21 | 908ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-13 07:24:10 | 677ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-19 09:53:51 | 805ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-13 21:39:48 | 801ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-23 18:11:02 | 851ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-17 11:46:43 | 2777ms | 2 NS 2 A 0 MX | 🔒 Secure |