tztest.dk is a .dk domain served by 4 nameservers (ns-1100.awsdns-09.org, ns-1727.awsdns-23.co.uk, ns-292.awsdns-36.com and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 137.135.135.103 is hosted by Microsoft Corporation (AS8075) in Ireland. Mail is handled by tztest-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest 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 |
|---|---|---|---|---|---|---|---|
| 137.135.135.103 | 3600s | — | AS8075 | Microsoft Corporation | 137.135.0.0/16 | 🇮🇪 Ireland | Dublin |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.136 |
| TXT Record |
|---|
| globalsign-domain-verification=E26A644EFEB930456955C035E119369F |
| Policy | Record (_dmarc.tztest.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:6464b932f12ee@dmarc.centerasecurity.com; |
| www | 137.135.135.103 (AS8075) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.tztest.dk | d22b351b-b550-4183-b154-b0233e9f326a.trustzonevalidation.com |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 1 |
| Primary NS (MNAME) | ns-1727.awsdns-23.co.uk |
| Responsible (RNAME) | awsdns-hostmaster@amazon.com |
| Refresh | 7200s |
| Retry | 900s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 13:58:50 shown | 3833ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 14:54:12 | 5147ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 01:32:43 | 3871ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-02 22:53:29 | 5489ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 04:22:03 | 24045ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 00:01:34 | 1737ms | 4 NS 1 A 1 MX | 🔒 Secure |