exer.dk is a .dk domain served by 2 nameservers (kate.ns.cloudflare.com, terry.ns.cloudflare.com). It was registered on 19 June 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 157.90.152.91 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by mail.exer.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 |
|---|---|---|---|---|---|---|---|
| 157.90.152.91 | 300s | exer.dk | AS24940 | Hetzner Online GmbH | 157.90.0.0/16 | 🇩🇪 Germany | Falkenstein |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.exer.dk | 2a04:52c0:108:c9a4::1 5.255.103.58 |
mail.exer.dk mail.exer.dk |
AS60404 The Infrastructure Group B.V. AS60404 The Infrastructure Group B.V. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | mail.exer.dk → 5.255.103.58 |
| 🔶 Autoconfig | mail.exer.dk → 5.255.103.58 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a01:4f8:c010:45b8::1 | 300s | exer.dk | AS24940 | Hetzner Online GmbH | 2a01:4f8:0:0:0:0:0:0/31 | 🇩🇪 Germany | Falkenstein |
| TXT Record |
|---|
| v=spf1 include:_spf.exer.dk -all |
| Policy | Record (exer.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.exer.dk -all |
| Policy | Record (_dmarc.exer.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:noreply-dmarc@system.exer.dk |
| www CNAME | exer.dk (all on exer.dk) |
| www vs bare domain | Same network exer.dk: 157.90.152.91 2a01:4f8:c010:45b8::1 (AS24940) www.exer.dk: 157.90.152.91 2a01:4f8:c010:45b8::1 (AS24940) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | 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: 4/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.exer.dk | k19XL1uGa0RlbRh8NCpX6zVaaoDQ5idU6Ypd0yPbFDs |
| TXT | _acme-challenge.exer.dk | OIgcBJdPIuuMw2D6oQ0qqcO2XZkeWXfm6DrzL2GLvqY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.exer.dk | DANE-EE · SPKI · SHA-256 | 59397706616DA37C4D924055C30DFAA3… |
| 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 | 2412398398 |
| Primary NS (MNAME) | kate.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2006-06-19 |
| Expires | 2035-08-31 (3240d) |
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 |
|---|---|---|---|
| 2026-10-17 00:32:15 | 3506ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-09 16:44:31 | 6805ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-06 15:57:30 | 2460ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-23 13:04:52 | 922ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 14:41:29 | 1233ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-18 15:36:34 | 1370ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-17 03:31:32 shown | 4820ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-10 23:54:35 | 5350ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-01 23:28:52 | 1118ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 09:09:31 | 1363ms | 2 NS 1 A 1 MX | 🔓 Insecure |