1900tennis.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 2 March 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx1.mailpod15-cph3.g1i.one.com, mx2.mailpod15-cph3.g1i.one.com and 2 more. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns01.one.com | — | — | — |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 51.210.114.101 | — | ns3173912.ip-51-210-114.eu | AS16276 | — | — | — | — |
| www | 51.210.114.101 (AS16276) (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 |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.mailpod15-cph3.g1i.one.com | DANE-EE · SPKI · SHA-256 | DB00CDA1DB82CC93CBF96D7D5806F329… |
| SMTP _25._tcp.mx2.mailpod15-cph3.g1i.one.com | DANE-EE · SPKI · SHA-256 | DB00CDA1DB82CC93CBF96D7D5806F329… |
| SMTP _25._tcp.mx3.mailpod15-cph3.g1i.one.com | DANE-EE · SPKI · SHA-256 | DB00CDA1DB82CC93CBF96D7D5806F329… |
| SMTP _25._tcp.mx4.mailpod15-cph3.g1i.one.com | DANE-EE · SPKI · SHA-256 | DB00CDA1DB82CC93CBF96D7D5806F329… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026060701 |
| 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 | ONE.COM A/S |
| Registered | 2000-03-02 |
| Expires | 2027-03-31 (159d) |
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 |
|---|---|---|---|
| 2026-10-16 16:39:44 | 1372ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-09 05:01:43 | 2445ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-08 04:59:57 | 843ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-24 15:59:32 | 1225ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-25 05:44:33 | 10481ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-18 22:36:16 | 3079ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-25 01:42:35 | 980ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-24 02:04:38 | 882ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-19 03:22:21 | 1840ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-18 10:17:11 | 1114ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-16 13:11:24 shown | 11473ms | 2 NS 1 A 4 MX | 🔒 Secure |