buildingos.dk is a .dk domain served by 2 nameservers (carmelo.ns.cloudflare.com, paloma.ns.cloudflare.com). It first appeared in the .dk zone on 30 June 2026. Its website address 104.21.30.92 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by .. The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.30.92 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.172.179 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::ac43:acb3 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:1e5c | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.30.92,172.67.172.179 ech=AEX+DQBBgQAgACCRKpEw7Dan0Hdrwr7Y6aWdIRl8VviRfpMXwj+ia1lpJwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:acb3,2606:4700:3037::6815:1e5c |
| www | 104.21.30.92 172.67.172.179 2606:4700:3033::ac43:acb3 2606:4700:3037::6815:1e5c (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network buildingos.dk: 104.21.30.92 172.67.172.179 2606:4700:3033::ac43:acb3 2606:4700:3037::6815:1e5c (AS13335) www.buildingos.dk: 104.21.30.92 172.67.172.179 2606:4700:3033::ac43:acb3 2606:4700:3037::6815:1e5c (AS13335) |
| Wildcard | No |
| 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 | 2415014895 |
| Primary NS (MNAME) | carmelo.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 11:44:39 shown | 514ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-18 22:46:18 | 655ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-14 09:16:57 | 706ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-10 02:55:17 | 720ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-25 11:15:48 | 1058ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-15 18:48:24 | 1064ms | 2 NS 2 A 1 MX | ❓ Unknown |
| 2026-07-08 14:06:13 | 636ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-01 20:42:27 | 2171ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-01 09:22:18 | 8813ms | 2 NS 1 A 1 MX | 🔓 Insecure |