biering.dk is a .dk domain served by 2 nameservers (adel.ns.cloudflare.com, brett.ns.cloudflare.com). It was registered on 3 March 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.17.222 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by in1-smtp.messagingengine.com, in2-smtp.messagingengine.com. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.17.222 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.178.156 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::ac43:b29c | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:11de | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h2" ipv4hint=104.21.17.222,172.67.178.156 ech=AEX+DQBBBAAgACA91S5zQ2ut+IUs4A/0c8CX8o35qX3fNlXZTebB8uW8ZAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::ac43:b29c,2606:4700:3037::6815:11de |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _imaps._tcp | 0 | 1 | 993 | imap.fastmail.com |
| TXT Record |
|---|
| v=spf1 include:spf.peercraft.net include:spf.messagingengine.com ~all |
| Policy | Record (biering.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.peercraft.net include:spf.messagingengine.com ~all |
| Policy | Record (_dmarc.biering.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:604d6e67d8b04c70a73b65f213e60d78@dmarc-reports.cloudflare.net,mailto:bfc703db3342601@rep.dmarcanalyzer.com,mailto:dmarc_agg@vali.email; pct=100; sp=reject; fo=d |
| Check | Result |
|---|---|
| Status | 🧪 Testing |
| TXT record (_mta-sts) | ✓ Found |
| HTTPS policy | ✓ Valid |
| Mode | testing |
| Policy ID | 04706f58196111854c5b060b27bf2cb0 |
| max_age | 604800s |
| Policy MX | in1-smtp.messagingengine.com, in2-smtp.messagingengine.com |
| Status | Report address (rua) |
|---|---|
| ✓ Enabled | mailto:peercraft-d@tlsrpt.report-uri.com |
| Flags | Tag | Value |
|---|---|---|
| 0 | iodef | mailto:teknik@peercraft.com |
| 0 | issue | comodoca.com |
| 0 | issue | digicert.com; cansignhttpexchanges=yes |
| 0 | issue | letsencrypt.org |
| 0 | issue | pki.goog; cansignhttpexchanges=yes |
| 0 | issue | ssl.com |
| 0 | issuewild | comodoca.com |
| 0 | issuewild | digicert.com; cansignhttpexchanges=yes |
| 0 | issuewild | letsencrypt.org |
| 0 | issuewild | pki.goog; cansignhttpexchanges=yes |
| 0 | issuewild | ssl.com |
| www | 104.21.17.222 172.67.178.156 2606:4700:3032::ac43:b29c 2606:4700:3037::6815:11de (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 2/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2416984689 |
| Primary NS (MNAME) | adel.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 | 2000-03-03 |
| Expires | 2036-03-31 (3452d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-14 07:43:56 | 2952ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-10-10 21:37:21 | 3113ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-10-09 17:21:12 shown | 3218ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-10-08 12:09:26 | 1235ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-10-05 07:06:18 | 1245ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-10-03 06:55:20 | 2683ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-10-02 06:45:45 | 781ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-10-01 06:39:35 | 1073ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-09-23 20:02:44 | 1503ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-09-17 11:44:30 | 2041ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-08-27 11:56:08 | 1669ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-08-26 11:43:58 | 1072ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-08-07 19:10:32 | 2190ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-08-04 19:04:26 | 1984ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-07-13 21:20:05 | 3802ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-06-25 08:20:57 | 1326ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-06-21 05:00:53 | 1177ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-06-19 13:38:11 | 1327ms | 2 NS 2 A 2 MX | 🔒 Secure |
| 2026-06-16 14:29:42 | 1065ms | 2 NS 2 A 2 MX | 🔒 Secure |