optimumcoaching.dk is a .dk domain served by 3 nameservers (ns5.chosting.dk, ns6.chosting.dk, ns7.chosting.dk). It was registered on 28 August 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 178.20.216.100 is hosted by Atea A/S (AS21060) in Denmark. Mail is handled by optimumcoaching.dk. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 178.20.216.100 | 14400s | server18.chosting.dk | AS21060 | Atea A/S | 178.20.216.0/23 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 14400s | optimumcoaching.dk | 178.20.216.100 2a01:7cc0:101:ffff::1:14 |
server18.chosting.dk — |
AS21060 Atea A/S AS21060 Atea A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 178.20.216.100 |
| 🔶 Autoconfig | 178.20.216.100 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a01:7cc0:101:ffff::1:14 | 14400s | — | AS21060 | Atea A/S | 2a01:7cc0:100:0:0:0:0:0/40 | 🇩🇰 Denmark | — |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| google-site-verification=XHN1lufaSoTCgJm8DDUDPfiuwBDNsq5uEuGMOdysno4 |
| v=spf1 ip4:178.20.216.100 include:spf.chosting.dk +a +mx ~all |
| Policy | Record (optimumcoaching.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ip4:178.20.216.100 include:spf.chosting.dk +a +mx ~all |
| Policy | Record (_dmarc.optimumcoaching.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www CNAME | optimumcoaching.dk (all on optimumcoaching.dk) |
| www vs bare domain | Same network optimumcoaching.dk: 178.20.216.100 2a01:7cc0:101:ffff::1:14 (AS21060) www.optimumcoaching.dk: 178.20.216.100 2a01:7cc0:101:ffff::1:14 (AS21060) |
| 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: 5/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.optimumcoaching.dk | 2ZtluAZrzZFWbMCW2tz517L9ak6Nc9a854BMA6Y9ysg |
| 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 | 2026091000 |
| Primary NS (MNAME) | ns5.chosting.dk |
| Responsible (RNAME) | logs@chosting.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2019-08-28 |
| Expires | 2027-08-31 (318d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 16:23:32 shown | 656ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 06:58:43 | 1661ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-26 12:36:28 | 759ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-13 20:14:05 | 1180ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-06 19:06:00 | 1276ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 20:22:43 | 881ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 05:58:37 | 9570ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-06 21:46:35 | 1233ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-27 19:04:53 | 2728ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 23:17:21 | 685ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 22:09:40 | 762ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-18 03:09:58 | 1793ms | 3 NS 1 A 1 MX | 🔓 Insecure |