matematikplanen.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 15 August 2008 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 216.239.32.21 is hosted by Google LLC (AS15169) in United States. Mail is handled by .. The zone is DNSSEC-signed and validates, has no DMARC policy and is reachable over IPv6. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 216.239.32.21 | 600s | any-in-2015.1e100.net | AS15169 | Google LLC | 216.239.32.0/20 | 🇺🇸 United States | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | matematikplanen.dk → 216.239.32.21 |
| 🔶 Autoconfig | matematikplanen.dk → 216.239.32.21 |
| TXT Record |
|---|
| google-site-verification=O49OjTrTMS5Sj8duseUXJ4wif-gXttcv6f4cgPitAU0 |
| www CNAME | matematikplanen.dk (all on matematikplanen.dk) |
| www vs bare domain | Same network matematikplanen.dk: 216.239.32.21 2001:4860:4802:32::15 2001:4860:4802:34::15 2001:4860:4802:36::15 (AS15169) www.matematikplanen.dk: 216.239.32.21 2001:4860:4802:32::15 2001:4860:4802:34::15 2001:4860:4802:36::15 (AS15169) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.matematikplanen.dk | matematikplanen.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026080601 |
| 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 | 2008-08-15 |
| Expires | 2027-08-31 (310d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-07 11:46:36 | 748ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 06:19:48 | 478ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 04:24:38 | 668ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-17 07:23:47 | 1113ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-06 00:06:39 | 1987ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 16:40:48 | 814ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-07 11:48:01 shown | 1057ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-08 22:44:36 | 2038ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 08:19:32 | 979ms | 2 NS 1 A 0 MX | 🔒 Secure |