ntreffeld.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 March 2006 (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 mail.ntreffeld.dk, mx4.spamfri.dk and 3 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 | — | web8.e-studio.dk | AS62121 | Christian Ebsen ApS | 193.200.90.0/23 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 193.200.90.180 |
| 🔶 Autoconfig | 193.200.90.180 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk ~all |
| Policy | Record (ntreffeld.dk) |
|---|---|
| ~all (soft fail) | v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk ~all |
| Policy | Record (_dmarc.ntreffeld.dk) |
|---|---|
| p=reject | v=DMARC1;p=reject; sp=none; adkim=s; aspf=s |
| www | 178.20.217.4 (AS21060) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 3/10 · policy: ~all
No problems found| 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 | 2026052301 |
| 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 | FIONIA IT ApS |
| Registered | 2006-03-09 |
| Expires | 2027-03-31 (155d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-26 04:42:37 | 654ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-03 07:17:13 | 525ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-01 02:14:09 | 1997ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-24 00:04:48 | 855ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-08-26 18:54:26 | 1199ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-08-25 11:23:51 | 648ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-07-24 11:33:27 | 9740ms | 3 NS 1 A 5 MX | ❓ Unknown |
| 2026-06-23 11:08:24 | 2264ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-06-22 16:08:39 | 1121ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-22 04:55:27 | 938ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-06-18 01:15:54 shown | 1234ms | 3 NS 1 A 5 MX | 🔓 Insecure |