rekenber.dk DNS records

🖥️ Nameservers3 records 59ms

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 Records1 records 50ms

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 Records2 records 62ms

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.

📧 Autodiscover / Autoconfig

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

🔷 AAAA Records (IPv6)1 records 70ms

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 Records1 records 136ms

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

📝 TXT Records2 records 336ms

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

🔗 TLSA / DANE

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

🔐 DNSSEC101ms

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

🏷️ SOA0ms

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

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

59ms

A

50ms

MX

62ms

AAAA

70ms

TXT

336ms

CAA

70ms

HTTPS

66ms

TLSA

121ms

SOA

0ms

MTA-STS

102ms

DNSSEC

101ms

SRV

136ms

Total

1033ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-26 01:32:50	1033ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-08-12 08:00:03	6086ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-07-17 07:29:11	10529ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-07-16 07:03:22	1342ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-06-28 05:30:34	1045ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-06-21 05:56:02	1688ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-06-19 09:15:36	3086ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-06-17 14:42:33	2196ms	3 NS 1 A 2 MX	🔒 Secure	View