butter.dk is a .dk domain served by 2 nameservers (fred.ns.cloudflare.com, sue.ns.cloudflare.com). It was registered on 28 March 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 37.221.193.137 is hosted by netcup GmbH (AS197540) in Germany. Mail is handled by route1.mx.cloudflare.net, route2.mx.cloudflare.net and 1 more. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 37.221.193.137 | 300s | mail.blubb.com | AS197540 | netcup GmbH | 37.221.192.0/21 | 🇩🇪 Germany | Nuremberg |
| TXT Record |
|---|
| v=spf1 include:_spf.mx.cloudflare.net ~all |
| Policy | Record (butter.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.mx.cloudflare.net ~all |
| www | 37.221.193.137 (AS197540) (address records, no CNAME) |
| www vs bare domain | Same network |
| 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: 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 | 0F0C6C164A36F97E7B4C5A5B69D6F4F2… |
| 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.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 | 2407284799 |
| Primary NS (MNAME) | fred.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Eurodns S.A |
| Registered | 2001-03-28 |
| Expires | 2027-03-31 (165d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 04:43:56 | 2867ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-10-08 11:58:50 | 759ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-27 07:15:22 | 826ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-24 04:27:36 | 1159ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-22 00:39:21 | 1348ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-17 03:41:12 | 1456ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-09-06 17:24:10 | 2184ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-31 16:59:10 | 3151ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-30 14:32:05 | 1997ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-29 08:19:16 | 2863ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-15 10:45:42 | 1779ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-08-06 16:15:42 | 3486ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-07-16 21:35:40 | 1251ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-23 03:27:14 shown | 1900ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-18 12:06:19 | 5843ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-16 17:55:38 | 821ms | 2 NS 1 A 3 MX | 🔒 Secure |