teachertool.dk is a .dk domain served by 2 nameservers (dilbert.ns.cloudflare.com, lana.ns.cloudflare.com). It was registered on 23 November 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 188.114.96.11 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx.simply.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 |
|---|---|---|---|---|---|---|---|
| 188.114.96.11 | — | — | AS13335 | Cloudflare, Inc. | 188.114.96.0/22 | — | — |
| 188.114.97.11 | — | — | AS13335 | Cloudflare, Inc. | 188.114.96.0/22 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mx.simply.com | 94.231.106.20 | mx.simply.com | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔶 Autoconfig | 188.114.96.0 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a06:98c1:3120::b | — | — | AS13335 | Cloudflare, Inc. | 2a06:98c1:3120:0:0:0:0:0/46 | — | — |
| 2a06:98c1:3121::b | — | — | AS13335 | Cloudflare, Inc. | 2a06:98c1:3120:0:0:0:0:0/46 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=188.114.96.11,188.114.97.11 ech=AEX+DQBBXQAgACCKtZprehaOOcZuI8UfRINUiU1H1hp2/GZSIeULHEiwSAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2a06:98c1:3120::b,2a06:98c1:3121::b |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| TXT Record |
|---|
| v=spf1 include:spf.simply.com -all |
| Policy | Record (teachertool.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.simply.com -all |
| www | 104.21.61.52 172.67.206.125 2606:4700:3030::6815:3d34 2606:4700:3033::ac43:ce7d (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network teachertool.dk: 104.21.61.52 172.67.206.125 2606:4700:3030::6815:3d34 2606:4700:3033::ac43:ce7d (AS13335) www.teachertool.dk: 104.21.61.52 172.67.206.125 2606:4700:3030::6815:3d34 2606:4700:3033::ac43:ce7d (AS13335) |
| Wildcard | No |
DNS lookups: 1/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | A9D603AF4D7ED6B9246B4B68500CD6F2… |
| 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 | 2406643758 |
| Primary NS (MNAME) | dilbert.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 | 2025-11-23 |
| Expires | 2026-11-22 (34d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-07 19:17:36 | 1151ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-04 17:02:26 | 685ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-03 16:58:25 | 740ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-30 16:50:12 | 679ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-30 02:23:21 | 839ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-21 11:16:08 | 10320ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-20 10:47:02 | 2336ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-14 05:08:21 | 4195ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-10 08:58:10 | 1964ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-08 22:00:02 | 2193ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-06 11:02:23 | 1797ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-30 20:14:54 | 912ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-18 00:04:03 shown | 3139ms | 2 NS 2 A 1 MX | 🔓 Insecure |