byggebooking.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 178.251.4.116 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mail.byggebooking.dk. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 178.251.4.116 | 360s | vm0842.enterprisecloud.nu | AS48854 | team.blue Denmark A/S | 178.251.0.0/21 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mail.byggebooking.dk | 62.243.130.112 | — | AS3292 TDC Holding A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 178.251.4.116 |
| 🔶 Autoconfig | 178.251.4.116 |
| TXT Record |
|---|
| 7l5qfs8fbjcdsi8daggl6hoid1 |
| www | 178.251.4.116 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u13060478.wl229.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u13060478.wl229.sendgrid.net | RSA · ~1024 bit below 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.
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2025022401 |
| Primary NS (MNAME) | ns.dandomain.dk |
| Responsible (RNAME) | hostmaster@dandomain.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 01:21:13 shown | 613ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 09:05:48 | 642ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 06:31:56 | 768ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 20:43:14 | 1921ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-21 02:33:21 | 1121ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 06:35:54 | 1691ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 18:10:53 | 488ms | 2 NS 1 A 1 MX | 🔒 Secure |