byferier.dk is a .dk domain served by 2 nameservers (dina.ns.cloudflare.com, jonah.ns.cloudflare.com). It was registered on 19 September 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.12.181 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx.simply.com. The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.12.181 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.132.53 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx.simply.com | 94.231.106.20 | mx.simply.com | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔶 Autoconfig | 104.21.12.181 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3035::6815:cb5 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::ac43:8435 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.12.181,172.67.132.53 ech=AEX+DQBBAAAgACD2W8FZNPXilLiFC/JYVZLvaYyCsa38UVtHKosEQjL0JgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::6815:cb5,2606:4700:3035::ac43:8435 |
| www | 104.21.12.181 172.67.132.53 2606:4700:3035::6815:cb5 2606:4700:3035::ac43:8435 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network byferier.dk: 104.21.12.181 172.67.132.53 2606:4700:3035::6815:cb5 2606:4700:3035::ac43:8435 (AS13335) www.byferier.dk: 104.21.12.181 172.67.132.53 2606:4700:3035::6815:cb5 2606:4700:3035::ac43:8435 (AS13335) |
| Wildcard | No |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | A9D603AF4D7ED6B9246B4B68500CD6F2… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2407009702 |
| Primary NS (MNAME) | dina.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2017-09-19 |
| Expires | 2027-07-31 (285d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 15:22:29 | 397ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-01 03:32:20 | 630ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-24 19:24:11 | 596ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-06 18:48:00 | 2061ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-30 17:36:02 | 1008ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-15 09:00:33 | 2179ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-13 20:44:44 | 1097ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-28 22:17:07 | 857ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-27 09:38:35 shown | 829ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-19 18:12:18 | 1616ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-16 18:10:15 | 529ms | 2 NS 2 A 1 MX | 🔓 Insecure |