frse.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 15 May 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.19.191.28 is hosted by Cloudflare, Inc. (AS13335). 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 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 |
|---|---|---|---|---|---|---|---|
| 104.19.191.28 | 3600s | — | AS13335 | Cloudflare, Inc. | 104.16.0.0/14 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.154.136 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| v=spf1 ip4:95.166.254.106 ip4:207.127.88.124 ip4:193.223.250.154 include:spf.protection.outlook.com include:webgrafkort.dk include:eu.mailgun.org include:_spf.centerasecurity.dk -all |
| Policy | Record (frse.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:95.166.254.106 ip4:207.127.88.124 ip4:193.223.250.154 include:spf.protection.outlook.com include:webgrafkort.dk include:eu.mailgun.org include:_spf.centerasecurity.dk -all |
| Policy | Record (_dmarc.frse.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; |
| www | 104.19.191.28 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 7/10 · 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 | 2026100801 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | CURANET A/S |
| Registered | 2014-05-15 |
| Expires | 2027-05-31 (217d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 06:29:19 shown | 2843ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-25 00:55:42 | 760ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-27 02:07:46 | 1184ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-26 21:14:04 | 2182ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-24 22:56:33 | 2757ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-23 00:21:16 | 1104ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 15:26:35 | 642ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-19 07:03:50 | 856ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-17 10:21:47 | 774ms | 2 NS 1 A 3 MX | 🔒 Secure |