rekenber.dk is a .dk domain served by 3 nameservers (ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu). It was registered on 16 June 2024 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 37.9.175.163 is hosted by WebSupport s.r.o. (AS51013) in Slovakia. Mail is handled by mx10.active24.cz, mx20.active24.cz. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 37.9.175.163 | 600s | ing.r3.websupport.sk | AS51013 | WebSupport s.r.o. | 37.9.168.0/21 | 🇸🇰 Slovakia | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 600s | mx10.active24.cz | 2a00:4b40:aaaa:2101:45:13:137:85 45.13.137.85 |
— mx10.active24.cz |
AS51013 WebSupport s.r.o. AS51013 WebSupport s.r.o. |
| 100 | 600s | mx20.active24.cz | 2a00:4b40:aaaa:2101:45:13:137:86 45.13.137.86 |
— mx20.active24.cz |
AS51013 WebSupport s.r.o. AS51013 WebSupport s.r.o. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | web.prod.bts.websupport.sk → 37.9.169.172 |
| 🔶 Autoconfig | web.prod.bts.websupport.sk → 37.9.169.172 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a00:4b40:aaaa:2005::5 | 600s | — | AS51013 | WebSupport s.r.o. | 2a00:4b40:0:0:0:0:0:0/32 | 🇸🇰 Slovakia | — |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | web.prod.bts.websupport.sk |
| TXT Record |
|---|
| spf2.0/pra a mx include:_sid.m1.websupport.sk ?all |
| v=spf1 a mx include:_spf.m1.websupport.sk ?all |
| Policy | Record (rekenber.dk) |
|---|---|
| ?all (neutral) | v=spf1 a mx include:_spf.m1.websupport.sk ?all |
| www | 37.9.175.163 2a00:4b40:aaaa:2005::5 (AS51013) (address records, no CNAME) |
| www vs bare domain | Same network rekenber.dk: 37.9.175.163 2a00:4b40:aaaa:2005::5 (AS51013) www.rekenber.dk: 37.9.175.163 2a00:4b40:aaaa:2005::5 (AS51013) |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 0 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 3/10 · policy: ?all
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 1718369911 |
| Primary NS (MNAME) | ns1.websupport.cz |
| Responsible (RNAME) | admin@websupport.cz |
| Refresh | 7200s |
| Retry | 2048s |
| Expire | 1048576s |
| Minimum (neg-cache TTL) | 2560s |
| Field | Value |
|---|---|
| Registrar | ASCIO TECHNOLOGIES, CORP. DANMARK - FILIAL AF ASCIO TECHNOLOGIES, CORP. CANADA |
| Registered | 2024-06-16 |
| Expires | 2027-06-15 (235d) |
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 |
|---|---|---|---|
| 2026-10-05 15:27:44 | 4786ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-04 15:24:26 | 1475ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-12 01:54:55 | 1370ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 01:32:50 shown | 1033ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-12 08:00:03 | 6086ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-17 07:29:11 | 10529ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-16 07:03:22 | 1342ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-28 05:30:34 | 1045ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-21 05:56:02 | 1688ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-19 09:15:36 | 3086ms | 3 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-17 14:42:33 | 2196ms | 3 NS 1 A 2 MX | 🔒 Secure |