sidstefaerd.dk is a .dk domain served by 2 nameservers (ns1.aveo.dk, ns2.aveo.dk). It was registered on 9 January 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.204 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is DNSSEC-signed and validates, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 185.21.40.204 | — | linux27.curanet.dk | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | — | mx1.onlinemail.io | 185.21.42.12 | mx1.onlinemail.io | AS48854 team.blue Denmark A/S |
| 20 | — | mx2.onlinemail.io | 46.36.208.16 | mx2.onlinemail.io | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover-mf.onlinemail.io → 185.21.40.62 |
| 🔶 Autoconfig | autoconfig-mf.onlinemail.io → 185.21.40.62 |
| TXT Record |
|---|
| v=spf1 include:spf.onlinemail.io include:spf.curanet.dk include:spf.nembedemand.dk include:web.shared.mysmtp.com -all |
| Policy | Record (sidstefaerd.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.onlinemail.io include:spf.curanet.dk include:spf.nembedemand.dk include:web.shared.mysmtp.com -all |
| Policy | Record (_dmarc.sidstefaerd.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:dmarc@sidstefaerd.dk; adkim=s; aspf=s |
| www | 185.21.40.204 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| — | 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: 11/10 · policy: -all
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026021701 |
| Primary NS (MNAME) | ns1.aveo.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2022-01-09 |
| Expires | 2027-01-08 (83d) |
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 |
|---|---|---|---|
| 2026-09-30 22:36:39 | 696ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-23 16:44:44 | 483ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-29 17:23:03 | 606ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-25 23:31:16 | 641ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-21 19:28:12 | 634ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-21 15:10:40 | 1185ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 16:16:08 | 1007ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-18 06:51:56 shown | 814ms | 2 NS 1 A 2 MX | 🔒 Secure |