cosis.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 16 November 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 87.73.109.195 is hosted by DKTV A/S (AS15516) in Denmark. Mail is handled by smtp.cosis.dk. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 87.73.109.195 | 3600s | ip1.c232.ksv340.cust.comxnet.dk | AS15516 | DKTV A/S | 87.72.0.0/15 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | smtp.cosis.dk | 87.73.109.195 | ip1.c232.ksv340.cust.comxnet.dk | AS15516 DKTV A/S |
| TXT Record |
|---|
| v=spf1 ip4:87.73.109.194 ip4:87.73.109.195 -all |
| Policy | Record (cosis.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:87.73.109.194 ip4:87.73.109.195 -all |
| Flags | Tag | Value |
|---|---|---|
| 128 | issue | letsencrypt.org |
| www | 87.73.109.195 (AS15516) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 0/10 · 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 | 2026091001 |
| 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 | 2001-11-16 |
| Expires | 2026-12-31 (69d) |
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 |
|---|---|---|---|
| 2026-10-11 19:15:53 | 557ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 07:52:41 shown | 451ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-14 13:33:00 | 1392ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 00:50:54 | 632ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-11 04:37:41 | 2405ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-17 13:04:09 | 1878ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 22:43:48 | 1509ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 22:31:04 | 646ms | 2 NS 1 A 1 MX | 🔒 Secure |