dcu-sj.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 19 September 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.155.83.174 is hosted by nef Fonden (AS47304) in Denmark. Mail is handled by mail.dcu-sj.dk, backup-mx.post.tele.dk. 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 |
|---|---|---|---|
| ns01.one.com | — | — | — |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.155.83.174 | — | 3113964463.cgn.nefnet.dk | AS47304 | nef Fonden | 185.155.80.0/22 | 🇩🇰 Denmark | Agedrup |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mail.dcu-sj.dk | 185.155.83.174 | 3113964463.cgn.nefnet.dk | AS47304 nef Fonden |
| 20 | — | backup-mx.post.tele.dk | 80.160.77.115 | backup-mx2.post.tele.dk | AS3292 TDC Holding A/S |
| www | 185.155.83.174 (AS47304) (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 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026032401 |
| 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 | 2000-09-19 |
| Expires | 2027-09-30 (348d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-07 17:07:51 | 2101ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-01 15:40:20 | 2514ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-25 14:33:58 | 2490ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-24 00:59:05 | 749ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-03 12:26:48 | 663ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-28 06:29:17 | 619ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 11:39:36 | 663ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-16 18:42:57 | 955ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-09 20:25:07 | 8858ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-25 01:08:33 | 2650ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-24 04:16:13 | 1163ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-23 04:35:14 | 721ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-17 01:25:27 | 405ms | 2 NS 1 A 2 MX | ⚠️ Bogus |
| 2026-06-17 01:20:11 shown | 701ms | 2 NS 1 A 2 MX | 🔒 Secure |