sertmann.dk is a .dk domain served by 3 nameservers (ns1.e-studio.dk, ns2.e-studio.dk, ns3.e-studio.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.200.90.102 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 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 |
|---|---|---|---|---|---|---|---|
| 193.200.90.102 | 14400s | web9.e-studio.dk | AS62121 | Christian Ebsen ApS | 193.200.90.0/23 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 193.200.90.102 |
| 🔶 Autoconfig | 193.200.90.102 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| v=spf1 +a +mx +ip4:193.200.90.102 include:_spf.e-studio.dk ~all |
| Policy | Record (sertmann.dk) |
|---|---|
| ~all (soft fail) | v=spf1 +a +mx +ip4:193.200.90.102 include:_spf.e-studio.dk ~all |
| Policy | Record (_dmarc.sertmann.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www CNAME | sertmann.dk (all on sertmann.dk) |
| www vs bare domain | Same network |
| 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.sertmann.dk | oEz52D98l15QeaAGGja5gaKSLClR19UDT8908WNtVa0 |
| 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 | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026101601 |
| 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 |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 18:37:25 shown | 444ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-10-01 02:14:32 | 559ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-24 16:44:46 | 618ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-08-16 20:03:39 | 2943ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-27 02:39:15 | 1791ms | 3 NS 1 A 0 MX | ❓ Unknown |
| 2026-06-26 02:32:03 | 1573ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-23 03:53:14 | 785ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-22 20:01:08 | 1649ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-22 06:18:50 | 1159ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 13:39:44 | 2492ms | 3 NS 1 A 4 MX | 🔓 Insecure |