jkatz.dk is a .dk domain served by 2 nameservers (courtney.ns.cloudflare.com, rommy.ns.cloudflare.com). It was registered on 6 November 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.44.17 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx.zoho.eu, mx2.zoho.eu and 1 more. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.44.17 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.192.208 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::6815:2c11 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3033::ac43:c0d0 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.44.17,172.67.192.208 ech=AEX+DQBBGQAgACCKaHtfVF6fNt9STRBh1yCoOkXaKJTmO6a8mfburLveOAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:2c11,2606:4700:3033::ac43:c0d0 |
| TXT Record |
|---|
| v=spf1 include:zoho.eu ~all |
| Policy | Record (jkatz.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:zoho.eu ~all |
| Policy | Record (_dmarc.jkatz.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:jok@jkatz.dk; ruf=mailto:jok@jkatz.dk; sp=quarantine; adkim=r; aspf=r |
| www | 104.21.44.17 172.67.192.208 2606:4700:3031::6815:2c11 2606:4700:3033::ac43:c0d0 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 2/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.jkatz.dk | 2V1-tAnak1gX_GtwAt77CHTXSpN44itLJQTE4wF-wpw |
| TXT | _acme-challenge.jkatz.dk | DJ1CB_WTVSMGWtXjH-68Lpq2ysq8zjx8W-syFNXBtTI |
| 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 | 2412959367 |
| Primary NS (MNAME) | courtney.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2020-11-06 |
| Expires | 2027-11-30 (402d) |
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 |
|---|---|---|---|
| 2026-10-22 15:27:30 | 1058ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-20 22:35:20 | 1321ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-08 20:51:51 | 1323ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-28 22:57:11 | 1046ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-25 21:55:40 | 809ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-11 12:33:36 | 2271ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-04 08:54:19 | 1114ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-29 22:16:46 | 1877ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-27 20:18:54 | 1081ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-23 13:54:54 shown | 1693ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-06 08:34:37 | 2218ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-17 13:51:47 | 2877ms | 2 NS 2 A 3 MX | 🔓 Insecure |