seisbo.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 7 May 2013 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.111.240.176 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by seisbo-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 77.111.240.176 | 3600s | webcluster49.webpod11-cph3.one.com | AS51468 | One.com A/S | 77.111.240.0/22 | 🇩🇰 Denmark | Copenhagen |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.152 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:102:8086:8881:51e1:a3ae | 3600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (seisbo.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| www | 77.111.240.176 2a02:2350:5:102:8086:8881:51e1:a3ae (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network seisbo.dk: 77.111.240.176 2a02:2350:5:102:8086:8881:51e1:a3ae (AS51468) www.seisbo.dk: 77.111.240.176 2a02:2350:5:102:8086:8881:51e1:a3ae (AS51468) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| 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 | 2026101401 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2013-05-07 |
| Expires | 2028-05-31 (591d) |
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 |
|---|---|---|---|
| 2026-10-18 00:40:33 shown | 998ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-17 00:08:22 | 1496ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-14 20:54:56 | 1458ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-09 13:52:04 | 3206ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-14 21:51:02 | 1806ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-07 23:27:49 | 1604ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 18:16:45 | 688ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 17:26:08 | 749ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-17 22:25:48 | 5215ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-02 00:41:39 | 1120ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-29 00:09:45 | 1291ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 23:27:35 | 1023ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 03:26:56 | 1554ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 02:38:24 | 910ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 03:48:25 | 1040ms | 2 NS 1 A 1 MX | 🔒 Secure |