lærerchat.dk is a .dk domain served by 2 nameservers (ns1.ordbogen.com, ns2.ordbogen.com). It was registered on 29 October 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.240.88.18 is hosted by Ordbogen A/S (AS198901) in Denmark. Mail is handled by mail.ordbogen.com. 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 |
|---|---|---|---|
| ns1.ordbogen.com | 91.240.88.19 | ns1.ordbogen.com | AS198901 Ordbogen A/S |
| ns2.ordbogen.com | 91.240.88.20 | ns2.ordbogen.com | AS198901 Ordbogen A/S |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 91.240.88.18 | — | www.ordbogen.com | AS198901 | Ordbogen A/S | 91.240.88.0/24 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mail.ordbogen.com | 91.240.88.21 | mail.ordbogen.com | AS198901 Ordbogen A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 91.240.88.18 |
| 🔶 Autoconfig | 91.240.88.18 |
| www | 91.240.88.18 (AS198901) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: ncache nxdomain |
| Field | Value |
|---|---|
| Serial | 1781262912 |
| Primary NS (MNAME) | ns1.ordbogen.com |
| Responsible (RNAME) | hostmaster@xn--lrerchat-j0a.dk |
| Refresh | 16384s |
| Retry | 2048s |
| Expire | 1048576s |
| Minimum (neg-cache TTL) | 2560s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2014-10-29 |
| Expires | 2035-07-31 (3202d) |
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 |
|---|---|---|---|
| 2026-10-18 05:57:39 | 1126ms | 2 NS 1 A 1 MX | ❓ Unknown |
| 2026-10-03 13:21:47 | 437ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 22:23:37 | 550ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-29 22:10:30 | 576ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-27 21:35:56 | 1065ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-19 21:46:39 | 1425ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-16 05:36:13 | 788ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-20 09:43:26 | 1330ms | 2 NS 1 A 1 MX | ❓ Unknown |
| 2026-08-19 09:21:25 | 4012ms | 2 NS 1 A 1 MX | ❓ Unknown |
| 2026-08-12 23:39:41 | 8854ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-07 12:57:14 | 33043ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-30 01:29:21 | 11988ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-25 05:38:20 | 866ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-22 01:58:43 | 635ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-27 01:53:31 | 393ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-25 22:28:55 | 478ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 05:00:28 | 2684ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 03:03:11 shown | 29387ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 01:16:35 | 699ms | 2 NS 1 A 1 MX | 🔒 Secure |