sfudlejning.dk is a .dk domain served by 2 nameservers (ns1.designrus.dk, ns2.designrus.dk). It was registered on 26 July 2013 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 49.12.124.182 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by sfudlejning-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 49.12.124.182 | 3600s | server2.designrus.dk | AS24940 | Hetzner Online GmbH | 49.12.0.0/15 | 🇩🇪 Germany | Falkenstein |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.154.152 |
| 🔶 Autoconfig | discover.designrus.dk → 49.12.124.182 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a01:4f8:242:5649::2 | 3600s | server2.designrus.dk | AS24940 | Hetzner Online GmbH | 2a01:4f8:0:0:0:0:0:0/31 | 🇩🇪 Germany | Falkenstein |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 1 | 1 | 443 | discover.designrus.dk |
| _sipfederationtls._tcp | 100 | 1 | 443 | sipfed.online.lync.com |
| TXT Record |
|---|
| MS=ms40559701 |
| v=spf1 mx a include:spf.protection.outlook.com include:_spf.designrus.dk ~all |
| Policy | Record (sfudlejning.dk) |
|---|---|
| ~all (soft fail) | v=spf1 mx a include:spf.protection.outlook.com include:_spf.designrus.dk ~all |
| Policy | Record (_dmarc.sfudlejning.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:postmaster@sfudlejning.dk |
| Flags | Tag | Value |
|---|---|---|
| 0 | issue | letsencrypt.org |
| www | 49.12.124.182 2a01:4f8:242:5649::2 (AS24940) (address records, no CNAME) |
| www vs bare domain | Same network sfudlejning.dk: 49.12.124.182 2a01:4f8:242:5649::2 (AS24940) www.sfudlejning.dk: 49.12.124.182 2a01:4f8:242:5649::2 (AS24940) |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 0 iterations · no salt · opt-out RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 4/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.sfudlejning.dk | sfudlejning.dk |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026102102 |
| Primary NS (MNAME) | ns1.designrus.dk |
| Responsible (RNAME) | admin@designrus.dk |
| Refresh | 1200s |
| Retry | 540s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2013-07-26 |
| Expires | 2027-07-31 (279d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-24 23:08:10 shown | 1092ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-22 02:13:19 | 2447ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-16 15:51:41 | 3137ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-10 07:21:22 | 2048ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-08 04:19:56 | 1251ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-05 03:44:28 | 2567ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 03:06:54 | 1435ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-29 20:08:59 | 1620ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-24 18:54:15 | 1125ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-20 18:43:40 | 1095ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-16 17:50:49 | 1163ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-10 06:30:36 | 1715ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-08 17:46:02 | 2283ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-30 20:48:30 | 2029ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-25 09:46:21 | 1250ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-21 03:57:11 | 2479ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-16 08:08:20 | 4118ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-09 22:15:07 | 1578ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-07 01:18:51 | 11011ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-25 08:19:36 | 18561ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-21 01:09:29 | 1567ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-16 07:18:08 | 9735ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-11 07:31:49 | 1504ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-08 15:56:41 | 10427ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-30 12:48:27 | 1276ms | 2 NS 1 A 1 MX | 🔓 Insecure |