bybiler.dk is a .dk domain served by 2 nameservers (coen.ns.cloudflare.com, kira.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.50.26 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. The zone is of unknown DNSSEC status, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.50.26 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.155.183 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 94.231.108.148 |
| 🔶 Autoconfig | maildiscover.simply.com → 94.231.108.222 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::6815:321a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::ac43:9bb7 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.50.26,172.67.155.183 ech=AEX+DQBBVAAgACAYlBZfr5j//7hRSUJRM0Lgh0RbeVvsas9gg65zONY9OAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:321a,2606:4700:3036::ac43:9bb7 |
| TXT Record |
|---|
| google-site-verification=VDcYXzwggrEASfclnEUsSU_9IcTfYUbNF5YI9GrIvAM |
| v=spf1 include:_spf.google.com include:spf.simply.com -all |
| Policy | Record (bybiler.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.google.com include:spf.simply.com -all |
| Policy | Record (_dmarc.bybiler.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine |
| www | 104.21.50.26 172.67.155.183 2606:4700:3031::6815:321a 2606:4700:3036::ac43:9bb7 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| — | 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: 2/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | ❓ Unknown |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | broken trust chain resolving 'bybiler.dk/A/IN': 127.0.0.1#53 |
| Field | Value |
|---|---|
| Serial | 2411602619 |
| Primary NS (MNAME) | coen.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 12:49:55 | 980ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-09-23 16:51:25 | 1333ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-09-20 04:43:19 | 982ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-09-14 20:46:41 | 1619ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-08-25 11:21:10 | 738ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-08-09 12:00:38 shown | 1499ms | 2 NS 2 A 5 MX | ❓ Unknown |
| 2026-07-23 17:27:01 | 1780ms | 2 NS 2 A 5 MX | ❓ Unknown |
| 2026-07-22 14:35:14 | 1742ms | 2 NS 1 A 5 MX | ❓ Unknown |
| 2026-07-20 23:21:54 | 1359ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-07-18 18:19:19 | 1286ms | 3 NS 1 A 5 MX | 🔒 Secure |
| 2026-07-06 15:31:28 | 1945ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-26 23:12:03 | 730ms | 3 NS 3 A 1 MX | 🔒 Secure |
| 2026-06-22 16:49:13 | 920ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 18:19:38 | 3627ms | 3 NS 3 A 1 MX | 🔒 Secure |
| 2026-06-16 18:16:00 | 2040ms | 3 NS 3 A 1 MX | 🔒 Secure |
| 2026-06-16 18:07:41 | 471ms | 3 NS 3 A 1 MX | 🔒 Secure |
| 2026-06-16 18:00:58 | 732ms | 3 NS 3 A 1 MX | 🔒 Secure |