blacktilbud.dk is a .dk domain served by 2 nameservers (jaxson.ns.cloudflare.com, keira.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.48.186 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mail.blacktilbud.dk. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.48.186 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.136.62 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.blacktilbud.dk | 5.43.226.142 | mail.essaycock.com | AS51248 Host-Telecom.com s.r.o. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | mail.blacktilbud.dk → 5.43.226.142 |
| 🔶 Autoconfig | mail.blacktilbud.dk → 5.43.226.142 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3035::ac43:883e | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:30ba | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.48.186,172.67.136.62 ech=AEX+DQBB7gAgACDC0rnsHRoKLeDt0kiIEE4FV3cRf7rlMt+KUqAgnqX9SgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::ac43:883e,2606:4700:3037::6815:30ba |
| TXT Record |
|---|
| v=spf1 mx mail.blacktilbud.dk ip4:5.43.226.142 ~all |
| Policy | Record (blacktilbud.dk) |
|---|---|
| ~all (soft fail) | v=spf1 mx mail.blacktilbud.dk ip4:5.43.226.142 ~all |
| Policy | Record (_dmarc.blacktilbud.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:support@blacktilbud.dk |
| www | 104.21.48.186 172.67.136.62 2606:4700:3035::ac43:883e 2606:4700:3037::6815:30ba (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network blacktilbud.dk: 104.21.48.186 172.67.136.62 2606:4700:3035::ac43:883e 2606:4700:3037::6815:30ba (AS13335) www.blacktilbud.dk: 104.21.48.186 172.67.136.62 2606:4700:3035::ac43:883e 2606:4700:3037::6815:30ba (AS13335) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | RSA · ~1024 bit below 2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 1/10 · policy: ~all
| 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 | 2415419123 |
| Primary NS (MNAME) | jaxson.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 13:32:07 | 960ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-07 23:50:14 | 858ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 08:41:56 | 488ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-27 21:48:25 | 1142ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-22 13:04:53 shown | 847ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-19 20:37:36 | 953ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-09-12 19:10:20 | 638ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-25 06:56:45 | 555ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-08-17 02:57:05 | 1008ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-07-15 15:13:11 | 916ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-26 16:29:30 | 1649ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-21 15:56:29 | 709ms | 2 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-16 14:46:52 | 2499ms | 2 NS 2 A 0 MX | 🔓 Insecure |