rcs-messaging.dk is a .dk domain served by 2 nameservers (lucy.ns.cloudflare.com, stan.ns.cloudflare.com). It was registered on 8 February 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.83.129 is hosted by Cloudflare, Inc. (AS13335). 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 |
|---|---|---|---|---|---|---|---|
| 104.21.83.129 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.176.151 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3036::6815:5381 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:b097 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.83.129,172.67.176.151 ech=AEX+DQBBMAAgACCzfJnkHeFOvEV0dvKuEgc21MVV2kIl7TpTvua7c4uSdgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3036::6815:5381,2606:4700:3037::ac43:b097 |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (rcs-messaging.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.rcs-messaging.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s; |
| www | Exists, no address |
| www vs bare domain | www does not resolve rcs-messaging.dk: 104.21.83.129 172.67.176.151 2606:4700:3036::6815:5381 2606:4700:3037::ac43:b097 (AS13335) (all like this)www.rcs-messaging.dk: no address |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 0/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2406756893 |
| Primary NS (MNAME) | lucy.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 | 2017-02-08 |
| Expires | 2027-02-28 (129d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 10:31:58 | 437ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-10-01 14:16:30 | 714ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-21 20:03:07 | 574ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-13 05:53:41 | 777ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-09 03:47:28 | 2530ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-29 14:19:16 | 1831ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-27 23:33:19 | 631ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-27 06:56:07 | 509ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-15 01:30:46 | 16677ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-23 02:36:12 | 10388ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-14 16:22:56 | 897ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-29 10:50:32 | 1135ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-27 08:02:48 shown | 1871ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-26 22:51:41 | 796ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-26 06:41:56 | 895ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-22 01:43:39 | 490ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-19 15:56:14 | 663ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 12:07:04 | 1398ms | 2 NS 2 A 0 MX | 🔓 Insecure |