astrofysik.dk is a .dk domain served by 4 nameservers (ns01.one.com, ns02.one.com, ns1.nbi.dk and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 130.225.212.5 is hosted by IDDQD-AS (AS1835) in Denmark. Mail is handled by mx2.nbi.dk. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 130.225.212.5 | 86400s | — | AS1835 | IDDQD-AS | 130.225.0.0/16 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 86400s | mx2.nbi.dk | 130.225.213.194 | mx2.nbi.dk | AS1835 FSKNET-DK Forskningsnettet - Danish network for Research and Education |
| TXT Record |
|---|
| Instrumentcenter for Dansk Astrofysik |
| v=spf1 -all |
| Policy | Record (astrofysik.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.astrofysik.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s |
| www | 130.225.212.5 (AS1835) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| default | — | Revoked (empty key) |
| dkim | — | Revoked (empty key) |
| k1 | — | Revoked (empty key) |
| — | Revoked (empty key) | |
| s1 | — | Revoked (empty key) |
| s2 | — | Revoked (empty key) |
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: 0/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.astrofysik.dk | epbnNYxKiwgYbJAlaCG9s09Y_-kaTmCKvZ6_k37KR5c |
| 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 | 2026090701 |
| Primary NS (MNAME) | ns1.nbi.dk |
| Responsible (RNAME) | hostmaster@nbi.dk |
| Refresh | 7200s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 86400s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 02:39:41 shown | 1141ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-01 01:28:17 | 446ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-07 16:39:08 | 796ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-30 12:26:44 | 626ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-24 06:11:58 | 1307ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-23 21:01:42 | 916ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-23 08:05:57 | 744ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-23 03:13:36 | 2700ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-16 13:46:55 | 1867ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-16 13:46:38 | 513ms | 4 NS 1 A 1 MX | 🔓 Insecure |