0h.dk is a .dk domain served by 3 nameservers (ns1.e-studio.dk, ns2.e-studio.dk, ns3.e-studio.dk). It was registered on 9 December 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.200.90.180 is hosted by Christian Ebsen ApS (AS62121) in Denmark. Mail is handled by mx4.spamfri.dk, mx2.spamfri.dk and 2 more. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 193.200.90.180 | 600s | web8.e-studio.dk | AS62121 | Christian Ebsen ApS | 193.200.90.0/23 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | atollon.hostingnet.dk → 193.200.90.180 |
| 🔶 Autoconfig | atollon.hostingnet.dk → 193.200.90.180 |
| TXT Record |
|---|
| v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk +include:_spf.hostingnet.dk -all |
| Policy | Record (0h.dk) |
|---|---|
| -all (hard fail) | v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk +include:_spf.hostingnet.dk -all |
| Policy | Record (_dmarc.0h.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1;p=none; sp=none; adkim=s; aspf=s |
| www CNAME | 0h.dk (all on 0h.dk) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 7 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| 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: 4/10 · policy: -all
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.0h.dk | Ovgq5h_tCho0-Gspc4zpEKPG2XyBSlhq7vCu5BiyS6Y |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.spamfri.dk | DANE-EE · SPKI · SHA-256 | 884451547A03D0AC2F628D943839BAA6… |
| SMTP _25._tcp.mx2.spamfri.dk | DANE-EE · SPKI · SHA-256 | 6598C93F79B95376BB8099E9AC862167… |
| SMTP _25._tcp.mx3.spamfri.dk | DANE-EE · SPKI · SHA-256 | BBFB0694919290E5BC9D6E2C6F47D846… |
| SMTP _25._tcp.mx4.spamfri.dk | DANE-EE · SPKI · SHA-256 | 4EE743A99328AEF5142706CA5FD3AD61… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026052402 |
| Primary NS (MNAME) | ns1.e-studio.dk |
| Responsible (RNAME) | hostmaster@mailrelay.e-studio.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2002-12-09 |
| Expires | 2026-12-31 (75d) |
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).
| Domain | Registrar |
|---|---|
| ust.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 12:28:10 | 600ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-23 06:33:14 | 776ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-08 14:28:44 | 686ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-03 18:33:51 | 1399ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-08-25 04:52:23 | 745ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-07-24 21:30:57 | 1410ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-24 21:32:54 | 736ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-20 17:28:13 shown | 732ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-16 12:33:33 | 1958ms | 3 NS 1 A 4 MX | 🔓 Insecure |