opgavebygger.dk is a .dk domain served by 4 nameservers (ns01.stil.dk, ns02.stil.dk, ns03.stil.dk and 1 more). It was registered on 26 September 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.231.237.139 is hosted by Styrelsen for it og laering (AS3240) in Denmark. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 195.231.237.139 | 300s | — | AS3240 | Styrelsen for it og laering | 195.231.224.0/19 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| v=spf1 include:spf1.stil.dk ~all |
| Policy | Record (opgavebygger.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf1.stil.dk ~all |
| Policy | Record (_dmarc.opgavebygger.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; rua=mailto:tcod1eh2@ag.eu.dmarcadvisor.com; |
| www | 195.231.237.139 (AS3240) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 1/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101501 |
| Primary NS (MNAME) | ns01.stil.dk |
| Responsible (RNAME) | netdrift@stil.dk |
| Refresh | 900s |
| Retry | 300s |
| Expire | 3600000s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2011-09-26 |
| Expires | 2027-09-30 (344d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-15 05:37:43 shown | 4404ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-08 10:11:51 | 17795ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-10-01 04:34:51 | 16789ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-25 02:35:02 | 16989ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-24 02:08:56 | 4441ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-21 02:05:04 | 5290ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-14 00:40:06 | 5032ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-05 18:41:50 | 16435ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-27 18:03:00 | 16419ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-25 14:53:31 | 4490ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-25 07:51:14 | 17378ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-21 07:08:03 | 7530ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-20 06:54:59 | 4749ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-13 14:29:14 | 4707ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-11 12:05:18 | 6422ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-08 00:34:17 | 7072ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-31 23:37:16 | 4995ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-23 13:59:54 | 16804ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-16 16:02:47 | 4651ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-09 03:09:11 | 17803ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-07-03 11:05:35 | 8081ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-27 10:34:10 | 4771ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-25 13:12:11 | 4577ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-19 12:55:29 | 4754ms | 4 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-19 11:43:59 | 12557ms | 4 NS 1 A 0 MX | 🔒 Secure |