jco.dk is a .dk domain served by 3 nameservers (mailexchange.jcdhotel.dk, ns.jcdhotel.dk, ns3.jcdhotel.dk). It was registered on 1 July 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. The zone is not DNSSEC-signed, 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| mailexchange.jcdhotel.dk | 195.97.138.36 | mailexchange.jcdhotel.dk | AS3292 TDC Holding A/S |
| ns.jcdhotel.dk | 195.215.86.133 | — | AS3292 TDC Holding A/S |
| ns3.jcdhotel.dk | 13.81.43.137 | ns3.jcdhotel.dk | AS8075 Microsoft Corporation |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves jco.dk: no address www.jco.dk: no address |
| Wildcard | No |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 10000 |
| Primary NS (MNAME) | ns.jcdhotel.dk |
| Responsible (RNAME) | administrator@jcdhotel.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1999-07-01 |
| Expires | 2027-09-30 (346d) |
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 |
|---|---|---|---|
| 2026-09-03 09:11:38 | 11180ms | 3 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-23 10:51:31 shown | 467ms | 3 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-17 21:48:52 | 4097ms | 3 NS 0 A 0 MX | 🔓 Insecure |