isaac-cycle.dk is a .dk domain served by 2 nameservers (lila.ns.cloudflare.com, venkat.ns.cloudflare.com). It was registered on 4 October 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.61.146 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.isaac-cycle.dk. The zone is not DNSSEC-signed, has no 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 |
|---|---|---|---|---|---|---|---|
| 104.21.61.146 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.211.116 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.isaac-cycle.dk | — | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::ac43:d374 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:3d92 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.61.146,172.67.211.116 ech=AEX+DQBBfQAgACCAxupaFAI6NVjMORQ4rmFl4v6np55i99hO+ldI4tozEQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:d374,2606:4700:3037::6815:3d92 |
| TXT Record |
|---|
| v=spf1 a mx ip4:149.210.188.17 ~all |
| Policy | Record (isaac-cycle.dk) |
|---|---|
| ~all (soft fail) | v=spf1 a mx ip4:149.210.188.17 ~all |
| www | 104.21.61.146 172.67.211.116 2606:4700:3033::ac43:d374 2606:4700:3036::6815:3d92 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network isaac-cycle.dk: 104.21.61.146 172.67.211.116 2606:4700:3033::ac43:d374 2606:4700:3036::6815:3d92 (AS13335) www.isaac-cycle.dk: 104.21.61.146 172.67.211.116 2606:4700:3033::ac43:d374 2606:4700:3036::6815:3d92 (AS13335) |
| Wildcard | No |
DNS lookups: 2/10 · policy: ~all
No problems found| 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 | 2405603238 |
| Primary NS (MNAME) | lila.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 | 2009-10-04 |
| Expires | 2026-10-31 (11d) |
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 |
|---|---|---|---|
| 2026-10-08 21:45:40 | 687ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 18:43:50 | 598ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 12:38:17 | 801ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-09 08:26:05 | 976ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-30 06:01:06 | 1118ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-27 23:43:59 shown | 2301ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-25 21:13:59 | 690ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-22 23:38:03 | 1108ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 11:38:26 | 1004ms | 2 NS 2 A 1 MX | 🔓 Insecure |