rekenber.dk

Records from scan: 2026-10-05 15:27:44 · 4786ms total · last checked 2026-10-18 04:34 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

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 our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

3 records 179ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.websupport.cz	2a10:bbc0::11 45.10.97.11	ns1.websupport.eu ns1.websupport.eu	AS25234 ACTIVE 24, s.r.o. AS25234 ACTIVE 24, s.r.o.
ns2.websupport.cz	185.71.159.12 2a02:250:3::12	ns2.websupport.eu ns2.websupport.eu	AS25234 ACTIVE 24, s.r.o. AS25234 ACTIVE 24, s.r.o.
ns3.websupport.eu	2a10:bbc0::13 45.10.97.13	ns3.websupport.eu ns3.websupport.eu	AS25234 ACTIVE 24, s.r.o. AS25234 ACTIVE 24, s.r.o.

🌍 A Records#

1 records 170ms

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	—

📧 MX Records#

2 records 134ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	mx10.active24.cz	2a00:4b40:aaaa:2101:45:13:137:85 2a00:4b40:aaaa:2101:45:13:137:86 45.13.137.85 45.13.137.86	m1-u6-mx.active24.cz m1-u7-mx.active24.cz m1-u6-mx.active24.cz m1-u7-mx.active24.cz	AS51013 WebSupport s.r.o. AS51013 WebSupport s.r.o. AS51013 WebSupport s.r.o. AS51013 WebSupport s.r.o.
100	600s	mx20.active24.cz	2a00:4b40:aaaa:2101:45:13:137:85 2a00:4b40:aaaa:2101:45:13:137:86 45.13.137.85 45.13.137.86	m1-u6-mx.active24.cz m1-u7-mx.active24.cz m1-u6-mx.active24.cz m1-u7-mx.active24.cz	AS51013 WebSupport s.r.o. AS51013 WebSupport s.r.o. AS51013 WebSupport s.r.o. AS51013 WebSupport s.r.o.

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	web.prod.bts.websupport.sk → 37.9.169.172
🔶 Autoconfig	web.prod.bts.websupport.sk → 37.9.169.173

🔷 AAAA Records (IPv6)#

1 records 136ms

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	—

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 297ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	0	0	443	web.prod.bts.websupport.sk

📝 TXT Records#

2 records 664ms

TXT Record
spf2.0/pra a mx include:_sid.m1.websupport.sk ?all
v=spf1 a mx include:_spf.m1.websupport.sk ?all

✉️ SPF#

Policy	Record (rekenber.dk)
?all (neutral)	v=spf1 a mx include:_spf.m1.websupport.sk ?all

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

checked 2026-10-17 04:30:05

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

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: ?all

warn "?all" is neutral: it gives receivers no guidance, much like having no SPF

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

306ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

131ms

Field	Value
Serial	1718369915
Primary NS (MNAME)	ns1.websupport.cz
Responsible (RNAME)	admin@websupport.cz
Refresh	7200s
Retry	2048s
Expire	1048576s
Minimum (neg-cache TTL)	2560s

📋 Registration#

WHOIS fetched 2026-10-04 16:13:48

Field	Value
Registrar	ASCIO TECHNOLOGIES, CORP. DANMARK - FILIAL AF ASCIO TECHNOLOGIES, CORP. CANADA
Registered	2024-06-16
Expires	2027-06-15 (240d)

📋 WHOIS#

⏱️ Lookup Timing#

179ms

170ms

134ms

AAAA

136ms

TXT

664ms

CAA

205ms

HTTPS

185ms

TLSA

793ms

SOA

131ms

MTA-STS

250ms

DNSSEC

306ms

SRV

297ms

Total

4786ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-05 15:27:44 shown	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	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