surdej.dk is a .dk domain served by 4 nameservers (pns21.cloudns.net, pns22.cloudns.net, pns23.cloudns.net and 1 more). It was registered on 5 June 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.107.169.23 is hosted by BornFiber Service Provider ApS (AS24800) in Denmark. Mail is handled by mx.szn.dk, benji.szn.dk. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 185.107.169.23 | 3600s | bornmesh.dk | AS24800 | BornFiber Service Provider ApS | 185.107.168.0/22 | 🇩🇰 Denmark | Rønne |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.szn.dk | 185.107.169.23 2a00:4820:3f60:f00:9b03:9cf8:73f2:a355 |
bornmesh.dk mx.szn.dk |
AS24800 BornFiber Service Provider ApS AS24800 BornFiber Service Provider ApS |
| 20 | 3600s | benji.szn.dk | 2a01:7e01::f03c:91ff:fe2c:3d7d | benji.szn.dk | AS63949 Akamai Connected Cloud |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a00:4820:31b0:0:dacb:8aff:feba:55d7 | 3600s | undefined.hostname.localhost | AS24800 | BornFiber Service Provider ApS | 2a00:4820:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Rønne |
| TXT Record |
|---|
| v=spf1 a mx include:_spf.szn.dk -all |
| Policy | Record (surdej.dk) |
|---|---|
| -all (hard fail) | v=spf1 a mx include:_spf.szn.dk -all |
| Flags | Tag | Value |
|---|---|---|
| 0 | iodef | mailto:klaus@seistrup.dk |
| 0 | issue | letsencrypt.org |
| www | 185.107.169.23 2a00:4820:31b0:0:dacb:8aff:feba:55d7 (AS24800) (address records, no CNAME) |
| www vs bare domain | Same network surdej.dk: 185.107.169.23 2a00:4820:31b0:0:dacb:8aff:feba:55d7 (AS24800) www.surdej.dk: 185.107.169.23 2a00:4820:31b0:0:dacb:8aff:feba:55d7 (AS24800) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt · opt-out RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 7/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.benji.szn.dk | DANE-EE · SPKI · SHA-256 | 77F3A197C4C674959D044D6B4C0252B7… |
| SMTP _25._tcp.mx.szn.dk | DANE-EE · SPKI · SHA-256 | 77F3A197C4C674959D044D6B4C0252B7… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026082501 |
| Primary NS (MNAME) | pns21.cloudns.net |
| Responsible (RNAME) | kas@port53.dk |
| Refresh | 7200s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2006-06-05 |
| Expires | 2027-04-30 (195d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-04 13:33:30 | 16265ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-15 23:30:27 | 4923ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-27 16:31:11 shown | 1824ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 02:02:23 | 8266ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-06 06:12:18 | 1566ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-18 01:44:20 | 8125ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-26 14:40:03 | 7248ms | 4 NS 0 A 2 MX | 🔒 Secure |
| 2026-06-21 08:35:17 | 2613ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-21 07:05:57 | 1157ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 14:33:29 | 5984ms | 4 NS 1 A 2 MX | 🔒 Secure |