tdbl.dk DNS records

🖥️ Nameservers3 records 230ms

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 240ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
37.9.175.165	600s	ing.r3.websupport.sk	AS51013	WebSupport s.r.o.	37.9.168.0/21	🇸🇰 Slovakia	—

📧 MX Records2 records 273ms

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 → 37.9.169.173
🔶 Autoconfig	web.prod.bts.websupport.sk → 37.9.169.171

🔷 AAAA Records (IPv6)1 records 293ms

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 361ms

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

📝 TXT Records2 records 800ms

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

✉️ SPF

Policy	Record (tdbl.dk)
?all (neutral)	v=spf1 a mx include:_spf.websupport.cz ?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)

🔐 DNSSEC497ms

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

🏷️ SOA0ms

Field	Value
Serial	1739965197
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

230ms

A

240ms

MX

273ms

AAAA

293ms

TXT

800ms

CAA

271ms

HTTPS

271ms

TLSA

504ms

SOA

0ms

MTA-STS

403ms

DNSSEC

497ms

SRV

361ms

Total

9555ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-14 22:11:13	9555ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-08-13 20:28:17	3046ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-07-19 01:00:39	17364ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-07-17 18:11:46	1441ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-06-21 17:44:47	2503ms	3 NS 1 A 2 MX	🔒 Secure	View
2026-06-17 14:43:02	1419ms	3 NS 1 A 2 MX	🔒 Secure	View