instrumentundervisning-aarhus.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 27 May 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.103.100 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx.simply.com. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 94.231.103.100 | 600s | dnsforward.simply.com | AS48854 | team.blue Denmark A/S | 94.231.96.0/20 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.simply.com | 94.231.103.108 94.231.106.20 |
mx.simply.com mx.simply.com |
AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 94.231.103.65 |
| 🔶 Autoconfig | maildiscover.simply.com → 94.231.108.222 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| www | 94.231.103.100 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network instrumentundervisning-aarhus.dk: 94.231.103.100 (AS48854) www.instrumentundervisning-aarhus.dk: 94.231.103.100 (AS48854) |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 4B949F05A63FED95FC94B3A83DD70167… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026093000 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2019-05-27 |
| Expires | 2027-05-31 (219d) |
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 |
|---|---|---|---|
| 2026-10-23 06:15:02 | 462ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-21 12:20:48 shown | 480ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 18:16:18 | 655ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 18:07:50 | 455ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 22:09:03 | 589ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-04 07:26:59 | 601ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-25 14:21:05 | 650ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 11:40:12 | 697ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-19 11:48:49 | 2728ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 15:13:11 | 269ms | 0 NS 0 A 0 MX | ❓ Unknown |