ert.dk is a .dk domain served by 3 nameservers (ns5.chosting.dk, ns6.chosting.dk, ns7.chosting.dk). It was registered on 3 January 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 178.20.216.31 is hosted by Atea A/S (AS21060) in Denmark. Mail is handled by ert.dk. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 178.20.216.31 | 14400s | server12.chosting.dk | AS21060 | Atea A/S | 178.20.216.0/23 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 14400s | ert.dk | 178.20.216.31 2a01:7cc0:101:ffff::1:a |
server12.chosting.dk — |
AS21060 Atea A/S AS21060 Atea A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 178.20.216.31 |
| 🔶 Autoconfig | 178.20.216.31 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a01:7cc0:101:ffff::1:a | 14400s | — | AS21060 | Atea A/S | 2a01:7cc0:100:0:0:0:0:0/40 | 🇩🇰 Denmark | — |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| v=spf1 ip4:178.20.216.31 include:spf.chosting.dk +a +mx +ip4:178.20.216.32 ~all |
| Policy | Record (ert.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ip4:178.20.216.31 include:spf.chosting.dk +a +mx +ip4:178.20.216.32 ~all |
| Policy | Record (_dmarc.ert.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www CNAME | ert.dk (all on ert.dk) |
| www vs bare domain | Same network ert.dk: 178.20.216.31 2a01:7cc0:101:ffff::1:a (AS21060) www.ert.dk: 178.20.216.31 2a01:7cc0:101:ffff::1:a (AS21060) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 5/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.ert.dk | 3IEnL5Bpo09tbNRsuuwYaqKzbsGe4fHYs_uuvsysv5w |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026052600 |
| Primary NS (MNAME) | ns5.chosting.dk |
| Responsible (RNAME) | logs@chosting.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2000-01-03 |
| Expires | 2027-03-31 (160d) |
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).
| Domain | Registrar |
|---|---|
| sommerhusetmols.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 13:19:04 | 2749ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-01 05:18:27 | 619ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-04 04:43:47 | 1122ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 07:02:06 | 976ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-04 10:51:54 | 4419ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-21 03:10:44 shown | 490ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 08:15:41 | 779ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 08:15:37 | 2639ms | 3 NS 1 A 1 MX | 🔓 Insecure |