frederikssund.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.237.125.92 is hosted by Procopa IT ApS (AS210939) in Denmark. Mail is handled by mx1-dk.centerasecurity.dk, mx2-dk.centerasecurity.dk and 1 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 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 |
|---|---|---|---|---|---|---|---|
| 185.237.125.92 | 43200s | — | AS210939 | Procopa IT ApS | 185.237.124.0/22 | 🇩🇰 Denmark | Copenhagen |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 87.54.23.200 |
| 🔶 Autoconfig | frederikssund.dk → 185.237.125.92 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 0 | 0 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| _globalsign-domain-verification=lQeUbb6T23XXGOfIEiQtCtTQybNL4sJaA9UpEwx2zQ |
| apple-domain-verification=J82kA1UahU7KKk8G |
| google-site-verification=hLA7DRg3UiWaOMZ9AeR4lMGKZdcFefuh-IFZIOUSYpM |
| GT/9DD4RL892E310tsqKaNRcHJqnq9bC7B78ZJ8aeX/GxqAL6S4mNs5VyXOqM3OfWLikIsQxJdwzQvq/cSUzgA== |
| MS=ms37147955 |
| MS=ms77593104 |
| tmes=1bf75e35a80a48646c5353b763aabf9e |
| v=spf1 ip4:109.238.52.0/25 ip4:89.104.206.160 ip4:195.50.36.0/22 ip4:195.50.43.0/24 ip4:195.50.44.0/22 ip4:195.50.48.0/22 ip4:34.251.115.175 ip4:193.111.162.2 ip4:185.21.40.55 ip4:185.158.62.153 ip4:87.54.23.198 include:servers.mcsv.net include:spf.protection.outlook.com include:spf.ubivox.com include:_spf.centerasecurity.dk -all |
| Policy | Record (frederikssund.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:109.238.52.0/25 ip4:89.104.206.160 ip4:195.50.36.0/22 ip4:195.50.43.0/24 ip4:195.50.44.0/22 ip4:195.50.48.0/22 ip4:34.251.115.175 ip4:193.111.162.2 ip4:185.21.40.55 ip4:185.158.62.153 ip4:87.54.23.198 include:servers.mcsv.net include:spf.protection.outlook.com include:spf.ubivox.com include:_spf.centerasecurity.dk -all |
| Policy | Record (_dmarc.frederikssund.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:64edbcac8583e@dmarc.centerasecurity.com; ruf=mailto:dmarc@frederikssund.dk; fo=1; |
| www | 185.237.125.92 (AS210939) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 4/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx1-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| SMTP _25._tcp.mx2-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| SMTP _25._tcp.mx2-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx3-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | 56315B43B892E9AEE184919EC6A5821C… |
| SMTP _25._tcp.mx3-dk.centerasecurity.dk | DANE-EE · SPKI · SHA-256 | D4C349E7B72F5CF4A9CEA358F98947C2… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026090401 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-24 08:02:21 | 495ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-08 07:22:14 | 1218ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-06 04:00:00 | 2016ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-04 03:36:36 | 515ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-01 03:59:11 | 805ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-01 03:04:32 | 1094ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-29 02:47:32 | 1044ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-26 01:41:16 | 923ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-24 00:15:20 | 928ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-06 02:49:30 shown | 1264ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-31 22:51:41 | 741ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-31 05:57:30 | 2346ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-28 07:23:07 | 887ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-09 07:28:55 | 5292ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-07 20:59:48 | 2669ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-31 22:27:23 | 3381ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-30 06:46:33 | 815ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-29 21:36:23 | 1176ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-28 20:56:03 | 929ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-28 03:03:51 | 899ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-25 14:25:29 | 3418ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-24 02:40:02 | 1159ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-23 15:09:23 | 1139ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 11:55:57 | 987ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 09:48:32 | 947ms | 2 NS 1 A 3 MX | 🔒 Secure |