systemgruppen.dk is a .dk domain served by 6 nameservers (ns10.dnsadmin.dk, ns11.dns-admin.dk, ns12.dnsadmin.dk and 3 more). It was registered on 23 June 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.42.106 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by dk.mx1.mailanyone.net, dk.mx2.mx25.net and 2 more. The zone is DNSSEC-signed and validates, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 185.21.42.106 | 3600s | prolinux5.curanet.dk | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.152 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| _globalsign-domain-verification=0AMaKYEiAQWgn01rMKZMs1owS_77EId3fA55I-UrOe |
| _globalsign-domain-verification=7sAQTz55Oqg6cdg5q-WWI8g0wXkn9IC74bkHO49tsC |
| google-site-verification=AMk1TFtFMpGZgwenR--sdf2xxBFqM3CjitfNTOIkaak |
| MS=ms40724719 |
| MS=ms54093480 |
| v=spf1 a a:mx1-sg.systemgruppen.dk a:mx2-sg.systemgruppen.dk include:spf.protection.outlook.com include:spf.emailsignatures365.com include:spfrerouting.xink.io -all |
| vpe=596ff814 |
| Policy | Record (systemgruppen.dk) |
|---|---|
| -all (hard fail) | v=spf1 a a:mx1-sg.systemgruppen.dk a:mx2-sg.systemgruppen.dk include:spf.protection.outlook.com include:spf.emailsignatures365.com include:spfrerouting.xink.io -all |
| Policy | Record (_dmarc.systemgruppen.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:60103bc4cb787@dmarc.centerasecurity.com; |
| www CNAME | systemgruppen.dk (all on systemgruppen.dk) → 185.21.42.106 (AS48854) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · 8-byte salt · opt-out RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 6/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2009010192 |
| Primary NS (MNAME) | ns20.digicertdns.com |
| Responsible (RNAME) | dns@digicertdns.com |
| Refresh | 43200s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 180s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1999-06-23 |
| Expires | 2027-06-30 (252d) |
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).
Showing 100 of 149.
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-19 21:53:42 shown | 2591ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-18 21:26:36 | 1068ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-15 19:38:54 | 849ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-14 18:24:58 | 1037ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-12 16:57:18 | 873ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-03 00:43:02 | 2685ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-02 00:38:27 | 2180ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-30 00:29:31 | 1897ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-21 16:50:14 | 2256ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-15 13:37:56 | 2092ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-08 05:19:35 | 2700ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-01 03:44:31 | 930ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-28 06:00:11 | 930ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-26 10:21:17 | 1424ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-21 19:08:45 | 1837ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-20 18:51:14 | 3242ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-19 09:28:09 | 10280ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-18 09:22:54 | 3721ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-15 10:03:53 | 1484ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-14 01:21:23 | 8448ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-09 15:43:56 | 17769ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-27 05:34:59 | 10405ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-20 17:02:27 | 2939ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-19 09:31:15 | 4109ms | 6 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-18 04:59:52 | 5310ms | 6 NS 1 A 4 MX | 🔒 Secure |