mail.ff1.cz - robtex.com

mail.ff1.cz

DNSSEC⚠️ Not signed
A2a00:4b40:aaaa:2101:45:13:137:121🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32
PTRm1-u5-ing.websupport.hu
A45.13.137.123🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24

ff1.cz

DNSSEC🔒 Signed (DS record present)
A2a00:4b40:aaaa:2005::7🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32
A37.9.175.165🇸🇰 WEBSUPPORT-SRO-SK-AS37.9.175.0/24
NSns1.websupport.cz ⭐
NSns2.websupport.cz
NSns3.websupport.eu
MXmx10.active24.cz ⭐
MXmx20.active24.cz(100)
TXTv=spf1 a mx include:_spf.websupport.cz -all
SOAns1.websupport.czadmin@websupport.cz serial=1774006796

Previously MX for

ff1.cz

Same first word

mail.ltda
mail.mysecuritycamera.org
mail.gov.ua
mail.net.ua
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mail.cat
mail.vin
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DNS History

5 records (2 active, 3 former)

2017201820192020202120222023202420252026A2a00:4b40:aaaa:2101:45:13:137:12145.13.137.1232001:1528:137::f182.208.29.194CNAMEmail.gransy.com
○A2001:1528:137::f12016-12-19 → 2016-12-19 · 2 obs
● 2016-12-19 13:29:58
○ 2026-08-09 06:38:20
●A2a00:4b40:aaaa:2101:45:13:137:1212026-08-09 → 2026-08-09 · 2 obs
○ 2016-12-19 13:29:58
● 2026-08-09 06:38:20
●A45.13.137.1232026-08-09 → 2026-08-09 · 2 obs
○ 2016-12-19 13:29:58
● 2026-08-09 06:38:20
○A82.208.29.1942016-12-19 → 2016-12-19 · 2 obs
● 2016-12-19 13:29:58
○ 2026-08-09 06:38:20
○CNAMEmail.gransy.com2016-12-19 → 2016-12-19 · 2 obs
● 2016-12-19 13:29:58
○ 2026-08-09 06:38:20

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czd.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz-
ff1.czns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu-

✅ Authoritative Response

Server:45.10.97.11

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

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 779ms | Queries: -

📄 Records

TypeCountSample Data
A145.13.137.123
AAAA12a00:4b40:aaaa:2101:45:13:137:121

Analysis

IP Addresses

mail.ff1.cz has two IP addresses: 45.13.137.123 and 2a00:4b40:aaaa:2101:45:13:137:121

Two other host names, along with mail.cssi-cr.cz, mail.dubina.cz and mail.eurosystems.sk, also share IP numbers with mail.ff1.cz.