rtz.dk is a .dk domain served by 3 nameservers (ns5.chosting.dk, ns6.chosting.dk, ns7.chosting.dk). It was registered on 16 January 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 178.20.216.20 is hosted by Atea A/S (AS21060) in Denmark. Mail is handled by rtz.dk. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 178.20.216.20 | 3600s | server11.chosting.dk | AS21060 | Atea A/S | 178.20.216.0/23 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 3600s | rtz.dk | 178.20.216.20 2a01:7cc0:101:ffff::1:8 |
server11.chosting.dk — |
AS21060 Atea A/S AS21060 Atea A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 178.20.216.20 |
| 🔶 Autoconfig | 178.20.216.20 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a01:7cc0:101:ffff::1:8 | 3600s | — | AS21060 | Atea A/S | 2a01:7cc0:100:0:0:0:0:0/40 | 🇩🇰 Denmark | — |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| v=spf1 ip4:178.20.216.20 include:spf.chosting.dk ip4:178.20.216.21 ~all |
| Policy | Record (rtz.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ip4:178.20.216.20 include:spf.chosting.dk ip4:178.20.216.21 ~all |
| Policy | Record (_dmarc.rtz.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www CNAME | rtz.dk (all on rtz.dk) |
| www vs bare domain | Same network rtz.dk: 178.20.216.20 2a01:7cc0:101:ffff::1:8 (AS21060) www.rtz.dk: 178.20.216.20 2a01:7cc0:101:ffff::1:8 (AS21060) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 3/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.rtz.dk | 7bu0-VIUycHyZDsD_4dhxtWbF3tfA4zycUQk5y_z0rA |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026052701 |
| Primary NS (MNAME) | ns5.chosting.dk |
| Responsible (RNAME) | logs@chosting.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2004-01-16 |
| Expires | 2027-01-31 (98d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 09:14:24 | 543ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-26 22:28:00 | 1228ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-08 13:31:27 | 9593ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-27 14:20:31 | 959ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-28 15:05:40 | 2854ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 11:41:02 shown | 999ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 22:42:43 | 676ms | 3 NS 1 A 1 MX | 🔓 Insecure |