fossum.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 19 October 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.4.216.5 is hosted by Itm8 A/S (AS62319) in Denmark. Mail is handled by fossum-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 185.4.216.5 | 900s | cp04.whm.wwi.dk | AS62319 | Itm8 A/S | 185.4.216.0/22 | 🇩🇰 Denmark | Viby J |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| 🔶 Autoconfig | fossum.dk → 185.4.216.5 |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (fossum.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.fossum.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:65c0eec842d42@dmarc-dk.centerasecurity.com; |
| www CNAME | fossum.dk (all on fossum.dk) → 185.4.216.5 (AS62319) |
| www vs bare domain | Same network |
| 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 |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-fossum-dk._domainkey.fossumdk.onmicrosoft.com | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026101200 |
| 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 | Simply.com A/S |
| Registered | 2001-10-19 |
| Expires | 2026-12-31 (68d) |
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).
| Domain | Registrar |
|---|---|
| com-municipality.dk | Punktum dk A/S (direct) |
| communicipality.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 15:26:35 shown | 1482ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-03 19:36:13 | 1627ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-29 19:20:10 | 1201ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-23 15:29:10 | 1022ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-05 00:58:08 | 3265ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-03 10:11:59 | 1248ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 13:01:32 | 1379ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-02 13:34:31 | 1292ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-26 19:12:08 | 1488ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 22:07:13 | 3039ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 19:03:44 | 1054ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-21 07:47:30 | 909ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 10:03:37 | 1236ms | 4 NS 1 A 1 MX | 🔒 Secure |