rufruf.dk DNS records

🖥️ Nameservers3 records 259ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.websupport.sk	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.sk	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.sk	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 194ms

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 260ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	mx10.websupport.cz	2a00:4b40:aaaa:2101:45:13:137:103 45.13.137.103	mx10.websupport.cz m1-u5-mx.websupport.cz	AS51013 WebSupport s.r.o. AS51013 WebSupport s.r.o.
100	600s	mx20.websupport.cz	2a00:4b40:aaaa:2101:45:13:137:104 45.13.137.104	mx20.websupport.cz m1-u6-mx.websupport.cz	AS51013 WebSupport s.r.o. AS51013 WebSupport s.r.o.

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	web.prod.bts.websupport.sk → 37.9.169.171
🔶 Autoconfig	web.prod.bts.websupport.sk → 37.9.169.173

🔷 AAAA Records (IPv6)1 records 252ms

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 545ms

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

📝 TXT Records1 records 1199ms

TXT Record
v=spf1 a mx include:_spf.websupport.cz -all

✉️ SPF

Policy	Record (rufruf.dk)
-all (hard fail)	v=spf1 a mx include:_spf.websupport.cz -all

📨 DMARC

Policy	Record (_dmarc.rufruf.dk)
p=quarantine	v=DMARC1; p=quarantine

📬 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 / DANE6 records 477ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx10.websupport.cz	DANE-TA · SPKI · SHA-256	C784333D20BCD742B9FDC3236F4E509B…
SMTP _25._tcp.mx10.websupport.cz	DANE-TA · SPKI · SHA-256	0E8BB18BBEEFB381BE21BFC1A206D317…
SMTP _25._tcp.mx10.websupport.cz	DANE-TA · SPKI · SHA-256	6BD9212CE649C659C9CABC6CB60FCFFA…
SMTP _25._tcp.mx20.websupport.cz	DANE-TA · SPKI · SHA-256	6BD9212CE649C659C9CABC6CB60FCFFA…
SMTP _25._tcp.mx20.websupport.cz	DANE-TA · SPKI · SHA-256	C784333D20BCD742B9FDC3236F4E509B…
SMTP _25._tcp.mx20.websupport.cz	DANE-TA · SPKI · SHA-256	0E8BB18BBEEFB381BE21BFC1A206D317…

🔐 DNSSEC813ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA0ms

Field	Value
Serial	1786538635
Primary NS (MNAME)	ns1.websupport.sk
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

259ms

A

194ms

MX

260ms

AAAA

252ms

TXT

1199ms

CAA

276ms

HTTPS

295ms

TLSA

477ms

SOA

0ms

MTA-STS

760ms

DNSSEC

813ms

SRV

545ms

Total

8193ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-02 18:39:13	10009ms	3 NS 1 A 2 MX	🔓 Insecure	View
2026-08-28 05:47:09	1376ms	3 NS 1 A 2 MX	🔓 Insecure	View
2026-08-25 23:11:43	1295ms	3 NS 1 A 2 MX	🔓 Insecure	View
2026-08-13 08:47:11	8193ms	3 NS 1 A 2 MX	🔓 Insecure	View