air-up.dk is a .dk domain served by 2 nameservers (guy.ns.cloudflare.com, lana.ns.cloudflare.com). It was registered on 3 December 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.41.20 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by .. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.41.20 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.189.10 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 3600s | . Null MX — domain accepts no email (RFC 7505) | |||
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::6815:2914 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::ac43:bd0a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.41.20,172.67.189.10 ech=AEX+DQBBcQAgACAjgd2RBNR+XBPR5Vne9MOFemoTlccjSUta4o/FVq40bQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:2914,2606:4700:3033::ac43:bd0a |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (air-up.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.air-up.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; |
| p=reject | v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s; |
| www | 104.21.41.20 172.67.189.10 2606:4700:3031::6815:2914 2606:4700:3033::ac43:bd0a (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 0/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.air-up.dk | JstOpX4tCYKr85BYGECM6n9y4hnDmqnReNQ1cfNG0pE |
| TXT | _acme-challenge.air-up.dk | lmKjwuFrGjU-SOEAUQn6jItSDf6Il8_mxQmO9am6dhE |
| 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 | 2411060431 |
| Primary NS (MNAME) | guy.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | InterNetX GmbH |
| Registered | 2020-12-03 |
| Expires | 2026-12-31 (68d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-06 20:37:50 | 4046ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-29 18:51:54 | 784ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 13:00:27 | 628ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-25 11:21:53 | 580ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-10 01:52:03 | 9045ms | 2 NS 2 A 1 MX | ❓ Unknown |
| 2026-08-03 02:51:05 shown | 912ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-28 13:37:03 | 674ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-23 12:37:48 | 1175ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-22 22:39:42 | 934ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-21 19:33:14 | 937ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 12:57:36 | 1383ms | 2 NS 2 A 0 MX | 🔓 Insecure |