concept2.dk is a .dk domain served by 2 nameservers (chloe.ns.cloudflare.com, steven.ns.cloudflare.com). It was registered on 13 September 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. We saw it become registrar-handled on 17 October 2026, when it moved from direct registration at Punktum to Eurodns S.A. Its website address 104.21.33.157 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by concept2-dk.mail.protection.outlook.com, backupmx.concept2.dk and 1 more. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.33.157 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.146.201 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.146.201 |
| 🔶 Autoconfig | 104.21.33.157 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3035::ac43:92c9 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::6815:219d | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.33.157,172.67.146.201 ech=AEX+DQBBTAAgACCwsNV9gfosRum5G2GyMHjXlt1GKY1Nm3A5OzsBAsosfgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::ac43:92c9,2606:4700:3036::6815:219d |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (concept2.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| www | 104.21.33.157 172.67.146.201 2606:4700:3035::ac43:92c9 2606:4700:3036::6815:219d (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network concept2.dk: 104.21.33.157 172.67.146.201 2606:4700:3035::ac43:92c9 2606:4700:3036::6815:219d (AS13335) www.concept2.dk: 104.21.33.157 172.67.146.201 2606:4700:3035::ac43:92c9 2606:4700:3036::6815:219d (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.concept2.dk | AYuCbbmYOzKve9xXwVzqT_S-V9l5Iudu3urneKgq0k0 |
| TXT | _acme-challenge.concept2.dk | J4TqrWce2GU3zsW88yntU_5LbPz7UDtAQU5kN_0adbc |
| 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 | 2417651199 |
| Primary NS (MNAME) | chloe.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Eurodns S.A |
| Registered | 2000-09-13 |
| Expires | 2027-09-30 (348d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-17 06:43:17 shown | 1186ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-24 05:16:15 | 1625ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-09-11 11:49:57 | 10331ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-09-01 17:34:49 | 1686ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-30 11:45:53 | 1400ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-20 21:05:00 | 885ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-16 22:11:32 | 2606ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-16 22:10:15 | 838ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-16 22:00:04 | 3204ms | 2 NS 1 A 3 MX | 🔓 Insecure |