cfu-online.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 15 November 2007 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 2.106.120.247 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by mx1.pub.mailpod11-cph3.one.com, mx2.pub.mailpod11-cph3.one.com and 2 more. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 2.106.120.247 | 3600s | — | AS3292 | TDC Holding A/S | 2.104.0.0/14 | 🇩🇰 Denmark | Nordhavn |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod11-cph3.one.com | 104.37.34.230 | mx1.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod11-cph3.one.com | 104.37.34.231 | mx2.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod11-cph3.one.com | 104.37.34.232 | mx3.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod11-cph3.one.com | 104.37.34.233 | mx4.pub.mailpod11-cph3.one.com | AS51468 One.com A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | cfu-online.dk → 2.106.120.247 |
| 🔶 Autoconfig | cfu-online.dk → 2.106.120.247 |
| TXT Record |
|---|
| HARICA-IlanEGqmlvopBaDJkj1 |
| www CNAME | cfu-online.dk (all on cfu-online.dk) → 2.106.120.247 (AS3292) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.cfu-online.dk | cfu-online.dk |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 24F573980561755185B794745411B05D… |
| SMTP _25._tcp.mx2.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 24F573980561755185B794745411B05D… |
| SMTP _25._tcp.mx3.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 24F573980561755185B794745411B05D… |
| SMTP _25._tcp.mx4.pub.mailpod11-cph3.one.com | DANE-EE · SPKI · SHA-256 | 24F573980561755185B794745411B05D… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026092101 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2007-11-15 |
| Expires | 2026-11-30 (39d) |
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 |
|---|---|---|---|
| 2026-10-09 09:54:08 shown | 1368ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-04 06:32:00 | 4559ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-01 06:25:10 | 804ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-29 22:49:05 | 798ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-24 08:10:28 | 705ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-23 14:08:46 | 876ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-18 00:35:49 | 5150ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-20 16:45:34 | 3329ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-19 22:20:40 | 8399ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 20:11:09 | 954ms | 2 NS 1 A 4 MX | 🔒 Secure |