b4zz.dk is a .dk domain served by 2 nameservers (dean.ns.cloudflare.com, suzanne.ns.cloudflare.com). It was registered on 14 September 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx.uplink.dk. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.uplink.dk | 2a0c:8900:3:298a::1 45.86.125.212 |
mx.uplink.dk mx.uplink.dk |
AS200462 ETH-Services AS200462 ETH-Services |
| TXT Record |
|---|
| v=spf1 mx -all |
| Policy | Record (b4zz.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx -all |
| www | Exists, no address |
| www vs bare domain | Neither resolves b4zz.dk: no address www.b4zz.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 |
| 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
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.uplink.dk | DANE-EE · SPKI · SHA-256 | B0971508DDECB3EF3E4651E930E49AEE… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2410819751 |
| Primary NS (MNAME) | dean.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 | 1999-09-14 |
| Expires | 2027-09-30 (347d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-17 05:39:07 | 2988ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-10-10 01:03:59 | 683ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-23 14:22:42 | 1150ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-18 09:08:37 | 1618ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-23 18:05:28 | 2182ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-19 01:46:08 | 9101ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-31 08:43:53 shown | 1211ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-19 23:53:06 | 1221ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-06 21:16:12 | 1655ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-26 04:43:45 | 2170ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-24 21:46:45 | 836ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-24 12:30:31 | 1191ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 15:12:35 | 1680ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-21 01:07:50 | 890ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-20 20:02:00 | 3182ms | 2 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-16 13:57:34 | 564ms | 2 NS 0 A 1 MX | 🔒 Secure |