sfaer.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 28 May 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx1.gigahost.dk, mx2.gigahost.dk 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 1800s | mx1.gigahost.dk | 46.183.139.11 | mx1.gigahost.dk | AS47292 Sentia Denmark A/S |
| 20 | 1800s | mx2.gigahost.dk | 46.183.139.12 | mx2.gigahost.dk | AS47292 Sentia Denmark A/S |
| 30 | 1800s | mx3.gigahost.dk | 46.183.139.13 | mx3.gigahost.dk | AS47292 Sentia Denmark A/S |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | autodiscover.gigahost.dk |
| _imap._tcp | 0 | 10 | 143 | imap.gigahost.dk |
| _imaps._tcp | 0 | 10 | 993 | imap.gigahost.dk |
| TXT Record |
|---|
| spf2.0/pra |
| v=spf1 a mx include:dopeserv.com -all |
| Policy | Record (sfaer.dk) |
|---|---|
| -all (hard fail) | v=spf1 a mx include:dopeserv.com -all |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves sfaer.dk: no address www.sfaer.dk: no address |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 6/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026061101 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2014-05-28 |
| Expires | 2029-05-31 (949d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 14:48:46 | 864ms | 2 NS 0 A 3 MX | 🔒 Secure |
| 2026-09-30 04:17:01 | 425ms | 2 NS 0 A 3 MX | 🔒 Secure |
| 2026-09-12 18:10:51 | 654ms | 2 NS 0 A 3 MX | 🔒 Secure |
| 2026-09-03 03:09:54 | 641ms | 2 NS 0 A 3 MX | 🔒 Secure |
| 2026-08-11 19:26:51 | 795ms | 2 NS 0 A 3 MX | 🔒 Secure |
| 2026-07-17 18:12:47 | 882ms | 2 NS 0 A 3 MX | 🔒 Secure |
| 2026-07-14 22:17:15 | 1120ms | 2 NS 0 A 3 MX | 🔒 Secure |
| 2026-06-28 08:26:12 | 4498ms | 2 NS 0 A 3 MX | 🔒 Secure |
| 2026-06-21 04:33:26 shown | 824ms | 2 NS 0 A 3 MX | 🔒 Secure |
| 2026-06-21 04:16:47 | 1135ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 01:16:39 | 586ms | 2 NS 0 A 3 MX | 🔒 Secure |