jo-informatik.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 16 February 1996 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 162.159.135.42 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by dk.mx1.mailanyone.net, dk.mx2.mx25.net and 2 more. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 162.159.135.42 | 600s | — | AS13335 | Cloudflare, Inc. | 162.159.128.0/19 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| 🔶 Autoconfig | 80.63.50.169 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 0 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| lg06cpc0510vcln50pprwt0fpx70fhxy |
| MS=ms37317868 |
| v=spf1 mx a include:spf.protection.outlook.com include:spfinclude.signflow.dk include:spf.mailanyone.net include:web.shared.mysmtp.com ip4:40.68.145.198 -all |
| Policy | Record (jo-informatik.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx a include:spf.protection.outlook.com include:spfinclude.signflow.dk include:spf.mailanyone.net include:web.shared.mysmtp.com ip4:40.68.145.198 -all |
| Policy | Record (_dmarc.jo-informatik.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; pct=100; rua=mailto:dmarc-report@jo-informatik.dk; |
| www CNAME | jo-informatik.dk (all on jo-informatik.dk) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| — | RSA · ~1024 bit below 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: 9/10 · policy: -all
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.jo-informatik.dk | jo-informatik.dk.kinstavalidation.app |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx1.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx2.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx3.mailanyone.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 1AAAC405385DEB66C25E43D629569F6C… |
| SMTP _25._tcp.dk.mx4.mx25.net | DANE-EE · Full cert · SHA-256 | 443DFE296DAC92DD311766BAD0B04CC7… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026070101 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1996-02-16 |
| Expires | 2027-03-31 (158d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 04:59:05 | 906ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-06 21:57:41 | 1916ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-10-05 20:34:29 | 2700ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-30 19:44:26 | 1434ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-23 14:52:23 | 895ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-20 06:13:21 | 2541ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-14 10:04:39 | 2274ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-07 09:45:14 | 888ms | 2 NS 1 A 4 MX | 🔓 Insecure |
| 2026-08-27 23:55:48 | 1266ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-07 14:27:06 | 25245ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-07 21:02:13 | 1604ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-01 09:05:43 shown | 931ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-18 02:42:27 | 1646ms | 2 NS 1 A 4 MX | 🔒 Secure |