up.dk is a .dk domain served by 2 nameservers (kianchau.ns.cloudflare.com, sue.ns.cloudflare.com). It was registered on 28 February 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.21.140 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by dk.mx1.mailanyone.net, dk.mx2.mx25.net and 2 more. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.21.140 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.199.26 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.213.24 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:158c | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::ac43:c71a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.21.140,172.67.199.26 ech=AEX+DQBBagAgACDNjVxtIkR+frNGvozvMwoFQTiyBnoOH2ughHQ9hIF1AQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:158c,2606:4700:3035::ac43:c71a |
| TXT Record |
|---|
| v=spf1 ip4:80.63.58.28 include:spf.protection.outlook.com -all |
| Policy | Record (up.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:80.63.58.28 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.up.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; adkim=s; aspf=s; pct=100; rua=mailto:cc1aa9fa175d4f59b353c2cb9086ed77@dmarc-reports.cloudflare.net; |
| www | 104.21.21.140 172.67.199.26 2606:4700:3030::6815:158c 2606:4700:3035::ac43:c71a (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 1/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| 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 | 2415377514 |
| Primary NS (MNAME) | kianchau.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 | 1997-02-28 |
| Expires | 2028-03-31 (525d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-23 08:35:04 shown | 1818ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-08-29 10:45:20 | 3113ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-08-27 23:24:58 | 1227ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-07-23 00:27:51 | 1744ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-07-01 19:39:30 | 1335ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-06-24 15:53:11 | 2461ms | 2 NS 2 A 4 MX | 🔓 Insecure |
| 2026-06-17 14:25:42 | 3825ms | 2 NS 2 A 4 MX | 🔓 Insecure |