bygningsisolering.dk is a .dk domain served by 5 nameservers (ns1.markmonitor.com, ns3.markmonitor.com, ns4.markmonitor.com and 2 more). It was registered on 23 June 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 217.116.230.19 is hosted by Sentia Denmark A/S (AS47292) in Denmark. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.markmonitor.com | — | — | — |
| ns3.markmonitor.com | — | — | — |
| ns4.markmonitor.com | — | — | — |
| ns5.markmonitor.com | — | — | — |
| ns6.markmonitor.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 217.116.230.19 | — | — | AS47292 | Sentia Denmark A/S | 217.116.224.0/20 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| v=spf1 ~all |
| Policy | Record (bygningsisolering.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ~all |
| Policy | Record (_dmarc.bygningsisolering.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1;p=none;rua=mailto:2y7cn1fh@ag.eu.dmarcian.com;ruf=mailto:2y7cn1fh@fr.eu.dmarcian.com |
| www | 217.116.230.19 (AS47292) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 0/10 · 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 | 2022011301 |
| Primary NS (MNAME) | ns1.markmonitor.com |
| Responsible (RNAME) | domain@manager.rockwool.com |
| Refresh | 28800s |
| Retry | 7200s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | MarkMonitor Inc. |
| Registered | 1997-06-23 |
| Expires | 2027-06-30 (247d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-25 07:44:00 | 1414ms | 5 NS 1 A 0 MX | 🔓 Insecure |
| 2026-10-21 19:49:03 | 1559ms | 5 NS 1 A 0 MX | 🔓 Insecure |
| 2026-10-01 09:18:59 | 10035ms | 5 NS 1 A 0 MX | 🔓 Insecure |
| 2026-09-23 16:51:00 | 2110ms | 5 NS 1 A 0 MX | 🔓 Insecure |
| 2026-07-03 06:45:23 | 984ms | 5 NS 1 A 0 MX | 🔓 Insecure |
| 2026-06-28 06:45:21 | 859ms | 5 NS 1 A 0 MX | 🔓 Insecure |
| 2026-06-27 07:40:05 | 1767ms | 5 NS 1 A 0 MX | 🔓 Insecure |
| 2026-06-21 19:28:05 | 3606ms | 5 NS 1 A 0 MX | 🔓 Insecure |
| 2026-06-21 11:45:27 | 1137ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-16 18:22:41 shown | 407ms | 5 NS 1 A 0 MX | 🔓 Insecure |
| 2026-06-16 18:20:18 | 447ms | 5 NS 1 A 0 MX | 🔓 Insecure |