key2know.dk is a .dk domain served by 2 nameservers (kristin.ns.cloudflare.com, sri.ns.cloudflare.com). It was registered on 17 February 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.77.136 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by key2know-dk.mail.protection.outlook.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 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 |
|---|---|---|---|---|---|---|---|
| 104.21.77.136 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.208.145 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.24 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::ac43:d091 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::6815:4d88 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.77.136,172.67.208.145 ech=AEX+DQBBUAAgACCp/3/EGAG9qXNHV51RKXanrenMlsge1uK0fIu7E6ZfHwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:d091,2606:4700:3033::6815:4d88 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| apple-domain-verification=qTShdh84eNxgsc4Z |
| google-site-verification=64j_lQgfgSqrg0JA9-IVBBA8Fl4KxYEic4CcWq034Uo |
| MS=ms11103204 |
| v=spf1 include:spf.protection.outlook.com a:mail1.c1.sdc-hosting.com a:mail1.c2.sdc-hosting.com ip4:195.184.96.12 ~all |
| wrike-verification=NTUzMTM2ODpkNDViZjhlNWJhNzllYzI0OGIxNTk4ZDkyMjUyNmYxOGM3OTM1YzdjZWNkYTZmNTk3NmFlNWJkMDkwYTc1NTYz |
| Policy | Record (key2know.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.protection.outlook.com a:mail1.c1.sdc-hosting.com a:mail1.c2.sdc-hosting.com ip4:195.184.96.12 ~all |
| Policy | Record (_dmarc.key2know.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:e89fe6ed5362453b854ef9f707a1edb1@dmarc-reports.cloudflare.net |
| www CNAME | eyy2cdx1ks3w.wpeproxy.com (all on wpeproxy.com) ⚠ Dangling: the CNAME target does not exist. If that name can be claimed (an unregistered domain, or a free name on a hosting platform), whoever claims it controls www.key2know.dk |
| www vs bare domain | www does not resolve key2know.dk: 104.21.77.136 172.67.208.145 2606:4700:3030::ac43:d091 2606:4700:3033::6815:4d88 (AS13335) (all like this)www.key2know.dk: no address |
| 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 |
| Selector | CNAME | Key |
|---|---|---|
| selector2 | selector2-key2know-dk._domainkey.key2know.onmicrosoft.com | 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.
DNS lookups: 3/10 · 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 | 2417397461 |
| Primary NS (MNAME) | kristin.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 | 2000-02-17 |
| Expires | 2027-03-31 (163d) |
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).
| Domain | Registrar |
|---|---|
| articulate.dk | Punktum dk A/S (direct) |
| e-laering-cfd.dk | Punktum dk A/S (direct) |
| e-læring.dk | Punktum dk A/S (direct) |
| k2k.dk | Punktum dk A/S (direct) |
| key2know-learning.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-14 18:51:01 shown | 983ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-30 00:51:45 | 734ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-28 04:43:34 | 1251ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-22 14:49:26 | 1517ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-07 07:08:13 | 1632ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-26 21:43:18 | 1204ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-06 04:49:15 | 3385ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-23 11:21:35 | 2484ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-10 12:21:35 | 1642ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-07 06:17:40 | 6667ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-21 09:08:13 | 1498ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-21 07:48:19 | 1185ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 17:21:47 | 1279ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-17 13:11:30 | 3266ms | 2 NS 2 A 1 MX | 🔒 Secure |