dahlin-nielsen.dk is a .dk domain served by 3 nameservers (ns4.hostonline.dk, ns5.hostonline.dk, ns6.hostonline.dk). It was registered on 25 January 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.20.205.50 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx.simply.com. The zone is not DNSSEC-signed, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.20.205.50 | 3600s | linux376.unoeuro.com | AS48854 | team.blue Denmark A/S | 185.20.204.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx.simply.com | 94.231.106.20 | mx.simply.com | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.24 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| MS=ms24609191 |
| v=spf1 ip4:185.20.205.50 include:_spf.hostonline.dk include:spf.protection.outlook.com include:spf.simply.com -all |
| Policy | Record (dahlin-nielsen.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:185.20.205.50 include:_spf.hostonline.dk include:spf.protection.outlook.com include:spf.simply.com -all |
| www CNAME | dahlin-nielsen.dk (all on dahlin-nielsen.dk) → 185.20.205.50 (AS48854) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 10 iterations · 8-byte salt · opt-out RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 6/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | A9D603AF4D7ED6B9246B4B68500CD6F2… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026090410 |
| Primary NS (MNAME) | ns4.hostonline.dk |
| Responsible (RNAME) | hostmaster@hostonline.dk |
| Refresh | 86400s |
| Retry | 7200s |
| Expire | 3600000s |
| Minimum (neg-cache TTL) | 172800s |
| Field | Value |
|---|---|
| Registrar | TS COMPUTER ApS |
| Registered | 2020-01-25 |
| Expires | 2027-01-31 (96d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 11:56:42 | 647ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-17 14:51:10 | 2577ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-12 11:31:26 | 3219ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-08 01:40:19 | 1257ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-07 19:21:13 | 1459ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 17:20:20 | 1405ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 16:33:40 | 999ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-22 13:14:37 | 867ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-20 00:09:22 | 1496ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-16 15:46:22 | 1303ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-07 02:43:46 | 986ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-04 12:15:45 shown | 9831ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-28 04:39:55 | 690ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-24 14:36:22 | 813ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 23:42:04 | 458ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 23:40:33 | 457ms | 3 NS 1 A 1 MX | 🔒 Secure |