blackfridays.dk is a .dk domain served by 2 nameservers (dee.ns.cloudflare.com, marty.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.78.186 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by route1.mx.cloudflare.net, route3.mx.cloudflare.net and 1 more. The zone is DNSSEC-signed and validates, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.78.186 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.168.87 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.78.186 |
| 🔶 Autoconfig | 104.21.78.186 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3036::6815:4eba | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:a857 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.78.186,172.67.168.87 ech=AEX+DQBBigAgACClcPRSYIi9pRSXEYI2Mp1rDDKFgCgesWfIc4Sj2ogUFwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3036::6815:4eba,2606:4700:3037::ac43:a857 |
| TXT Record |
|---|
| v=spf1 include:_spf.mx.cloudflare.net ~all |
| Policy | Record (blackfridays.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.mx.cloudflare.net ~all |
| Policy | Record (_dmarc.blackfridays.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:info@blackfridays.dk |
| www | 104.21.78.186 172.67.168.87 2606:4700:3036::6815:4eba 2606:4700:3037::ac43:a857 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network blackfridays.dk: 104.21.78.186 172.67.168.87 2606:4700:3036::6815:4eba 2606:4700:3037::ac43:a857 (AS13335) www.blackfridays.dk: 104.21.78.186 172.67.168.87 2606:4700:3036::6815:4eba 2606:4700:3037::ac43:a857 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route1.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| SMTP _25._tcp.route2.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-EE · SPKI · SHA-256 | 9BE5B7D47F9EFF930C11EB04D27CAE6B… |
| SMTP _25._tcp.route3.mx.cloudflare.net | DANE-TA · SPKI · SHA-256 | 59E738E674221702AF1EDB87C5200C1A… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2415852587 |
| Primary NS (MNAME) | dee.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 15:37:37 shown | 921ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-27 11:18:39 | 2782ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-26 01:40:24 | 1271ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-20 16:16:49 | 1156ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-10 22:33:16 | 1086ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-09-04 23:01:27 | 2004ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-26 13:20:59 | 1236ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-08-09 09:18:41 | 1703ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-21 01:08:15 | 1943ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-17 03:00:47 | 1882ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-07-08 20:52:54 | 1951ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-06-28 15:30:10 | 1037ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-06-21 20:41:42 | 1161ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 00:46:48 | 1200ms | 2 NS 2 A 3 MX | 🔒 Secure |
| 2026-06-16 14:45:32 | 937ms | 2 NS 2 A 3 MX | 🔒 Secure |