sonderborg-ungdomsskole.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 30 March 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.55 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by .. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.21.40.55 | 3600s | vm1251.enterprisecloud.nu | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | sonderborg-ungdomsskole.dk → 185.21.40.55 |
| 🔶 Autoconfig | sonderborg-ungdomsskole.dk → 185.21.40.55 |
| TXT Record |
|---|
| google-site-verification=XEBKez41ZLcLvsO7aVeFoqP-SyOKBzNI9o2GINHo-Kc |
| www CNAME | sonderborg-ungdomsskole.dk (all on sonderborg-ungdomsskole.dk) → 185.21.40.55 (AS48854) |
| www vs bare domain | Same network sonderborg-ungdomsskole.dk: 185.21.40.55 (AS48854) www.sonderborg-ungdomsskole.dk: 185.21.40.55 (AS48854) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.sonderborg-ungdomsskole.dk | sonderborg-ungdomsskole.dk |
| 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) | 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 | 2004-03-30 |
| Expires | 2027-03-31 (162d) |
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 |
|---|---|---|---|
| 2026-10-08 23:52:33 shown | 758ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 18:51:23 | 375ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 19:18:44 | 571ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-11 21:54:17 | 685ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 22:07:47 | 889ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-09 23:33:15 | 829ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-10 07:46:28 | 1609ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 20:41:53 | 2533ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 04:41:34 | 632ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 05:08:03 | 996ms | 2 NS 1 A 0 MX | 🔒 Secure |