roundtrip.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 20 May 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.164.164.82 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by roundtrip.dk, backup-mx.post.tele.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 |
|---|---|---|---|---|---|---|---|
| 93.164.164.82 | 43200s | binaryshelter.com | AS3292 | TDC Holding A/S | 93.164.160.0/19 | 🇩🇰 Denmark | Farsø |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | roundtrip.dk | 93.164.164.82 | binaryshelter.com | AS3292 TDC Holding A/S |
| 20 | 43200s | backup-mx.post.tele.dk | — | — | — |
| www CNAME | roundtrip.dk (all on roundtrip.dk) → 93.164.164.82 (AS3292) |
| 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 |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026040401 |
| 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 | 2009-05-20 |
| Expires | 2027-05-31 (226d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-05 00:51:17 | 612ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-02 00:39:18 | 501ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-01 00:35:25 | 795ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-30 00:28:25 | 681ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-26 23:43:49 | 2497ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-13 12:07:07 | 6416ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-27 03:49:37 | 708ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-25 21:45:18 shown | 2474ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-24 01:30:45 | 976ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 12:11:14 | 1170ms | 2 NS 1 A 2 MX | 🔒 Secure |