efterskolen.dk is a .dk domain served by 3 nameservers (ns.nerdonline.dk, ns2.nerdonline.dk, ns3.nerdonline.dk). It was registered on 29 September 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.235.50.241 is hosted by LeaseWeb Netherlands B.V. (AS60781) in The Netherlands. Mail is handled by efterskolen-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 77.235.50.241 | 17696s | — | AS60781 | LeaseWeb Netherlands B.V. | 77.235.50.0/23 | 🇳🇱 The Netherlands | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.97.189.72 |
| 🔶 Autoconfig | 167.233.0.165 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| google-site-verification=hL_GwL4PSUKpk44EcymFIxH5qEv3ioOXDCD4jGryl0w |
| google-site-verification=JvA7pSjheKSfX_BbqIw50b5EUScj2o5IHLVZkJ3InEk |
| MS=ms40084644 |
| v=spf1 a mx a:mailgw1.nerdonline.dk include:spf.protection.outlook.com include:amazonses.com ?all |
| Policy | Record (efterskolen.dk) |
|---|---|
| ?all (neutral) | v=spf1 a mx a:mailgw1.nerdonline.dk include:spf.protection.outlook.com include:amazonses.com ?all |
| Policy | Record (_dmarc.efterskolen.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 77.235.50.241 (AS60781) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 5/10 · policy: ?all
| 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 | 1409907435 |
| Primary NS (MNAME) | ns.nerdonline.dk |
| Responsible (RNAME) | hostmaster@nerdonline.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 38400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1999-09-29 |
| Expires | 2027-09-30 (339d) |
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 |
|---|---|---|---|
| 2026-09-19 19:02:19 | 1103ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-24 13:25:19 shown | 1332ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 06:05:09 | 687ms | 3 NS 1 A 1 MX | 🔓 Insecure |