holmbergtand.dk is a .dk domain served by 2 nameservers (ruben.ns.cloudflare.com, selah.ns.cloudflare.com). It was registered on 18 October 2026 (WHOIS) and first appeared in the .dk zone on 19 October 2026. Its website address 104.21.17.171 is hosted by Cloudflare, Inc. (AS13335). 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 |
|---|---|---|---|---|---|---|---|
| 104.21.17.171 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.177.183 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::6815:11ab | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3032::ac43:b1b7 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.17.171,172.67.177.183 ech=AEX+DQBBcwAgACBb4zgGG6GAhImHN1YP/pNlvLDDjcSmqVtPSQ6ZW1V3NwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:11ab,2606:4700:3032::ac43:b1b7 |
| www | 104.21.17.171 172.67.177.183 2606:4700:3032::6815:11ab 2606:4700:3032::ac43:b1b7 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network holmbergtand.dk: 104.21.17.171 172.67.177.183 2606:4700:3032::6815:11ab 2606:4700:3032::ac43:b1b7 (AS13335) www.holmbergtand.dk: 104.21.17.171 172.67.177.183 2606:4700:3032::6815:11ab 2606:4700:3032::ac43:b1b7 (AS13335) |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.holmbergtand.dk | GjOIpwJUrdS78ke8OYBqZ9tYiivTUq_EYO2PQscVtsA |
| TXT | _acme-challenge.holmbergtand.dk | kC2sC5PbLtwbgM7kvgPEgGCT6tIdRzW96MmQAAoK2KQ |
| 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 | 2418002563 |
| Primary NS (MNAME) | ruben.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2026-10-18 |
| Expires | 2027-10-17 (360d) |
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 |
|---|---|
| holmbergtandlaegerne.dk | Simply.com A/S |
| holmbergtandlægerne.dk | Simply.com A/S |
| klinikholmberg.dk | Punktum dk A/S (direct) |
| stegetand.dk | DANDOMAIN A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-21 09:37:18 shown | 3029ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-20 08:58:43 | 441ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-19 08:34:08 | 1545ms | 2 NS 2 A 0 MX | 🔓 Insecure |