instruktoerstol.dk is a .dk domain served by 5 nameservers (ns1.e-studio.dk, ns2.e-studio.dk, ns3.e-studio.dk and 2 more). It was registered on 25 November 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.200.90.182 is hosted by Christian Ebsen ApS (AS62121) in Denmark. Mail is handled by mail.instruktoerstol.dk. 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 |
|---|---|---|---|---|---|---|---|
| 193.200.90.182 | 300s | web12.e-studio.dk | AS62121 | Christian Ebsen ApS | 193.200.90.0/23 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.instruktoerstol.dk | 193.200.90.182 | web12.e-studio.dk | AS62121 Christian Ebsen ApS |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 193.200.90.182 |
| 🔶 Autoconfig | 193.200.90.182 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| v=spf1 +a +mx +ip4:193.200.90.182 include:_spf.e-studio.dk +include:relay.mailchannels.net -all |
| Policy | Record (instruktoerstol.dk) |
|---|---|
| -all (hard fail) | v=spf1 +a +mx +ip4:193.200.90.182 include:_spf.e-studio.dk +include:relay.mailchannels.net -all |
| Policy | Record (_dmarc.instruktoerstol.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; sp=none |
| www | 193.200.90.182 (AS62121) (address records, no CNAME) |
| 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: 4/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.instruktoerstol.dk | an-sntmjiYSUNLyRHdPnaToxMa_lFeKOc6-rknbmVoU |
| 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 | 2026092200 |
| 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 | 2022-11-25 |
| Expires | 2027-11-24 (393d) |
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).
Showing 100 of 172.
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 08:00:19 shown | 535ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-01 06:35:08 | 397ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-23 20:42:46 | 543ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-20 09:38:53 | 723ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-12 23:14:58 | 2093ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-06 13:02:43 | 1280ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 17:31:01 | 871ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 15:18:05 | 826ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-19 10:20:11 | 2916ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 14:50:07 | 388ms | 0 NS 0 A 0 MX | ❓ Unknown |