celt.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 6 April 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 172.104.148.7 is hosted by Akamai Connected Cloud (AS63949) in Germany. Mail is handled by mx.runbox.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 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 |
|---|---|---|---|---|---|---|---|
| 172.104.148.7 | 3600s | 172-104-148-7.ip.linodeusercontent.com | AS63949 | Akamai Connected Cloud | 172.104.128.0/18 | 🇩🇪 Germany | Frankfurt am Main |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.runbox.com | 185.226.149.25 | aibo.runbox.com | AS50304 Blix Solutions AS |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.104.148.7 |
| 🔶 Autoconfig | 172.104.148.7 |
| TXT Record |
|---|
| v=spf1 include:spf.runbox.com -all |
| Policy | Record (celt.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.runbox.com -all |
| www | 172.104.148.7 (AS63949) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 1/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.runbox.com | DANE-TA · SPKI · SHA-256 | B3FB5D00E994CDDF2CC9A4EEA9F806BC… |
| SMTP _25._tcp.mx.runbox.com | DANE-EE · SPKI · SHA-256 | 9A5D69227185C22FB9204903B517A029… |
| SMTP _25._tcp.mx.runbox.com | DANE-TA · SPKI · SHA-256 | 2E8307068B6DB620E4A39D068B5DEE5D… |
| SMTP _25._tcp.mx.runbox.com | DANE-TA · SPKI · SHA-256 | 51AAA87D984B559AC69E929F888A022D… |
| SMTP _25._tcp.mx.runbox.com | DANE-TA · SPKI · SHA-256 | 6EBCEFB4210B088654A38B03FEA3D7D1… |
| SMTP _25._tcp.mx.runbox.com | DANE-TA · SPKI · SHA-256 | 9D637B3D27A9E570D07607B9CCADB80A… |
| SMTP _25._tcp.mx.runbox.com | DANE-TA · SPKI · SHA-256 | A698A20824BE04E47A1A33C4FA488731… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101001 |
| 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 | 2000-04-06 |
| Expires | 2027-06-30 (256d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-10 22:21:13 shown | 1117ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 14:50:50 | 2562ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-11 18:48:27 | 651ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 04:44:04 | 782ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-10 19:03:11 | 3295ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-07 08:02:11 | 16741ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-16 06:18:08 | 853ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-12 12:36:17 | 906ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-01 12:29:26 | 666ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 21:58:37 | 50836ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 20:12:01 | 1563ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 20:01:46 | 640ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 20:01:03 | 563ms | 2 NS 1 A 1 MX | 🔒 Secure |