4v.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 January 2005 (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.4v.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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.e-studio.dk | — | — | — |
| ns2.e-studio.dk | — | — | — |
| ns3.e-studio.dk | — | — | — |
| 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 | — |
| TXT Record |
|---|
| v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk -all |
| Policy | Record (4v.dk) |
|---|---|
| -all (hard fail) | v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk -all |
| Policy | Record (_dmarc.4v.dk) |
|---|---|
| p=reject | v=DMARC1;p=reject; adkim=s; aspf=s |
| www CNAME | 4v.dk (all on 4v.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: 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 | 2026052401 |
| 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 | 2005-01-09 |
| Expires | 2027-08-31 (318d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-24 05:41:27 | 845ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-09-16 17:21:50 | 951ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-09-02 11:20:57 | 728ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-07-24 20:41:22 | 9299ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-07-05 20:56:28 | 33130ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-06-27 19:06:58 | 784ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-06-24 03:16:27 | 1629ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-06-22 02:18:41 | 993ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 17:00:07 | 1598ms | 3 NS 1 A 5 MX | 🔓 Insecure |
| 2026-06-16 12:55:27 shown | 2062ms | 3 NS 1 A 5 MX | 🔓 Insecure |