undervisningsplaner.dk is a .dk domain served by 2 nameservers (cory.ns.cloudflare.com, olivia.ns.cloudflare.com). It was registered on 19 October 2026 (WHOIS) and first appeared in the .dk zone on 20 October 2026. Its website address 104.21.48.122 is hosted by Cloudflare, Inc. (AS13335). 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 |
|---|---|---|---|---|---|---|---|
| 104.21.48.122 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.151.59 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:973b | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:307a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.48.122,172.67.151.59 ech=AEX+DQBBwwAgACBWsgAkONUSzcIOieAd82NhsPUyOjw0lnuJR7KZyKStDAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:973b,2606:4700:3035::6815:307a |
| TXT Record |
|---|
| brevo-code:704ef2879450cb6b7f1cfd6290994907 |
| Policy | Record (_dmarc.undervisningsplaner.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com |
| www | 104.21.48.122 172.67.151.59 2606:4700:3031::ac43:973b 2606:4700:3035::6815:307a (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network undervisningsplaner.dk: 188.114.96.1 188.114.97.1 2606:4700:3031::ac43:973b 2606:4700:3035::6815:307a (AS13335) www.undervisningsplaner.dk: 104.21.48.122 172.67.151.59 2606:4700:3031::ac43:973b 2606:4700:3035::6815:307a (AS13335) |
| Wildcard | No |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.undervisningsplaner.dk | EzN8zFL7lwaqb3t9H9EPzhZq7twKgvmAROwYDmnSSsU |
| TXT | _acme-challenge.undervisningsplaner.dk | -soX1UCjUQF-pbTXoBCim30yOC7aErp4MVSVw39xJQE |
| 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 | 2418077228 |
| Primary NS (MNAME) | cory.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 | 2026-10-19 |
| Expires | 2027-10-18 (361d) |
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 |
|---|---|
| michaelguldberg.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 00:37:17 shown | 3273ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-20 08:34:22 | 423ms | 2 NS 2 A 0 MX | 🔓 Insecure |