kosterco.dk is a .dk domain served by 2 nameservers (peaches.ns.cloudflare.com, steven.ns.cloudflare.com). It was registered on 7 February 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.74.51 is hosted by Cloudflare, Inc. (AS13335). The zone is not DNSSEC-signed, has no 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 |
|---|---|---|---|---|---|---|---|
| 104.21.74.51 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.155.64 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:9b40 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::6815:4a33 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.74.51,172.67.155.64 ech=AEX+DQBBwAAgACBrz9Z3yknC6L02ZXz0l/P33i3AGXPnjdxCmuGWSSuTAwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:9b40,2606:4700:3034::6815:4a33 |
| www | 104.21.74.51 172.67.155.64 2606:4700:3031::ac43:9b40 2606:4700:3034::6815:4a33 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network kosterco.dk: 104.21.74.51 172.67.155.64 2606:4700:3031::ac43:9b40 2606:4700:3034::6815:4a33 (AS13335) www.kosterco.dk: 104.21.74.51 172.67.155.64 2606:4700:3031::ac43:9b40 2606:4700:3034::6815:4a33 (AS13335) |
| Wildcard | No |
| 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 | 2415602023 |
| Primary NS (MNAME) | peaches.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 | 2017-02-07 |
| Expires | 2027-02-28 (129d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-24 01:44:57 shown | 628ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-08 20:30:54 | 632ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-25 00:16:17 | 567ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-24 15:30:01 | 785ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-11 12:17:31 | 1673ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-27 22:14:05 | 1764ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-18 03:32:40 | 613ms | 2 NS 2 A 0 MX | 🔓 Insecure |