skolefessor.dk is a .dk domain served by 2 nameservers (cloe.ns.cloudflare.com, terin.ns.cloudflare.com). It was registered on 31 December 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.9.122 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.skolefessor.dk. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.9.122 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.189.65 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mail.skolefessor.dk | — | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3035::ac43:bd41 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::6815:97a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.9.122,172.67.189.65 ech=AEX+DQBB2QAgACBrJiCgxDw8r2GE4KQ+nN0h6dUo+z/ATq8Dp/3ry9HFNAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::ac43:bd41,2606:4700:3036::6815:97a |
| TXT Record |
|---|
| v=spf1 a mx include:_spf.google.com ~all |
| Policy | Record (skolefessor.dk) |
|---|---|
| ~all (soft fail) | v=spf1 a mx include:_spf.google.com ~all |
| Policy | Record (_dmarc.skolefessor.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:dmarc@zebiza.com |
| www | Address record (no CNAME) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| default | — | Revoked (empty key) |
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 | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2415808973 |
| Primary NS (MNAME) | cloe.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 | 2024-12-31 |
| Expires | 2027-12-30 (434d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-04 08:30:25 shown | 486ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 03:03:44 | 529ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-26 04:03:58 | 647ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-25 03:38:23 | 610ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-12 08:48:56 | 2459ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 17:27:49 | 699ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-27 11:21:27 | 4706ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-20 09:30:25 | 8923ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-11 09:03:47 | 927ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 17:10:36 | 1700ms | 2 NS 2 A 1 MX | 🔓 Insecure |