mailin1.cssf.cz - robtex.com

mailin1.cssf.cz

DNSSEC⚠️ Not signed
A2a00:4b40:aaaa:2101:45:13:137:114🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32
PTRmx20.websupport.hu
A45.13.137.112🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24

cssf.cz

DNSSEC🔒 Signed (DS record present)
A185.184.254.10🇪🇸 SHOPTET185.184.254.0/24
A185.184.254.11🇪🇸 SHOPTET185.184.254.0/24
NSns1.websupport.cz ⭐
NSns2.websupport.cz
NSns3.websupport.eu
MXmailin1.cssf.cz ⭐
MXmailin2.cssf.cz(100)
TXTv=spf1 include:spf.active24.com include:_spf.m1.websupport.sk ~all
SOAns1.websupport.czadmin@websupport.cz serial=1771933459
WOT: SAFE (61/100)
WOT: SAFE (66/100)

MX for

cssf.cz

DNS History

2 records (2 active, 0 former)

A2a00:4b40:aaaa:2101:45:13:137:11445.13.137.112
●A2a00:4b40:aaaa:2101:45:13:137:1142026-03-24 → 2026-04-24 · 2 obs
● 2026-03-24 07:47:20
● 2026-04-24 03:57:52
●A45.13.137.1122026-03-24 → 2026-04-24 · 2 obs
● 2026-03-24 07:47:20
● 2026-04-24 03:57:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz-
cssf.czns3.websupport.eu, ns2.websupport.cz, ns1.websupport.cz-

✅ Authoritative Response

Server:185.71.159.12

NS records: ns3.websupport.eu, ns2.websupport.cz, ns1.websupport.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 937ms | Queries: -

📄 Records

TypeCountSample Data
A145.13.137.112
AAAA12a00:4b40:aaaa:2101:45:13:137:114

Analysis

Mail Server Role

mailin1.cssf.cz functions as a mail server for cssf.cz.

mailin2.cssf.cz is a mail server commonly used with mailin1.cssf.cz.

IP Addresses

mailin1.cssf.cz resolves to two IP numbers: 2a00:4b40:aaaa:2101:45:13:137:114 and 45.13.137.112.

other host names including mailin2.l-e.cz, mailin2.zwez.com, mailin2.ka5.de, mailin2.arcava.org and mailin2.kralovskefengshui.cz share IP numbers with mailin1.cssf.cz.