atheneum.dk is a .dk domain served by 2 nameservers (lee.ns.cloudflare.com, phoenix.ns.cloudflare.com). It was registered on 12 February 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.23.102 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by atheneum-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, has no 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 |
|---|---|---|---|---|---|---|---|
| 104.21.23.102 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.210.120 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | atheneum-dk.mail.protection.outlook.com | — | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::ac43:d278 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:1766 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.23.102,172.67.210.120 ech=AEX+DQBBwAAgACDGRjxvCz8doYu6X+dd+WlodStZU0+Tn71X91ybr+W9OAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:d278,2606:4700:3037::6815:1766 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| MS=ms22569307 |
| v=spf1 ip4:192.38.111.162/28 include:spf.messagelabs.com include:bounce.peytz.dk include:spf.protection.outlook.com -all |
| Policy | Record (atheneum.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:192.38.111.162/28 include:spf.messagelabs.com include:bounce.peytz.dk include:spf.protection.outlook.com -all |
| www | Exists, no address |
| www vs bare domain | www does not resolve atheneum.dk: 104.21.23.102 172.67.210.120 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) (all like this)www.atheneum.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 |
DNS lookups: 5/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2407111599 |
| Primary NS (MNAME) | lee.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 | 1997-02-12 |
| Expires | 2027-05-31 (226d) |
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 |
|---|---|---|---|
| 2026-10-15 15:37:41 | 2597ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-04 21:10:25 | 3764ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 20:52:47 | 2072ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-29 20:47:43 | 1766ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-21 22:21:54 | 1611ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-28 10:26:09 | 842ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-27 21:29:46 | 2098ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-08 22:58:10 | 10731ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-02 05:06:41 | 1956ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-11 12:22:00 | 11546ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-01 01:10:51 shown | 1073ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-23 18:46:35 | 1821ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-22 07:16:33 | 1166ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-19 03:42:35 | 4746ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-16 13:47:16 | 781ms | 2 NS 2 A 1 MX | 🔓 Insecure |