`mx-01.jestedliberec.cz`

DNSSEC	⚠️ Not signed
A	2a01:28:ca:72::100:231^{🇨🇿 SuperNetwork2a01:28::/32 s.r.o.}
		PTR	`mx-01.as4u.org`
A	88.86.100.231^{🇨🇿 SuperNetwork88.86.96.0/19 s.r.o.}

`jestedliberec.cz`

	DNSSEC	⚠️ Not signed
	A	2a01:28:ca:72::100:195^{🇨🇿 SuperNetwork2a01:28::/32 s.r.o.}
	A	88.86.100.195^{🇨🇿 SuperNetwork88.86.96.0/19 s.r.o.}
	NS	`ns.as4u.org` ⭐
	NS	`ns.as4u.cz`
	NS	`ns.district9.cz`
	MX	`mx-01.jestedliberec.cz` ⭐
	MX	`mx-02.jestedliberec.cz`⁽¹⁰⁾
	SOA	`ns.as4u.org`hostmaster@as4u.org 2018-08-24 #0

MX for

jestedliberec.cz

Same first word

mx-01.net

mx-01.de

Similar names

mx-10.com

mx-10.se

DNS History

2 records (2 active, 0 former)

●A2a01:28:ca:72::100:2312018-06-11 → 2026-04-25 · 5 obs

● 2018-06-11 16:00:04
● 2026-03-14 05:49:22
○ 2026-03-23 20:38:28
● 2026-03-29 15:24:40
● 2026-04-25 21:44:54

●A88.86.100.2312018-06-11 → 2026-04-25 · 2 obs

● 2018-06-11 16:00:04
● 2026-04-25 21:44:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
jestedliberec.cz	ns.as4u.cz, ns.as4u.org, ns.district9.cz	2 records

✅ Authoritative Response

Server:2a01:28:ca:72::100:200

NS records: ns.as4u.cz, ns.as4u.org, ns.district9.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jestedliberec.cz (unsigned zone)

⏱️ Timing

Total: 3228ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`88.86.100.231`
AAAA	1	`2a01:28:ca:72::100:231`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns.as4u.cz, ns.as4u.cz)

Analysis

Mail Server Role

mx-01.jestedliberec.cz is the mail server for jestedliberec.cz.

mx-02.jestedliberec.cz is a common mail server alongside mx-01.jestedliberec.cz.

IP Addresses

mx-01.jestedliberec.cz resolves to two IPs: 2a01:28:ca:72::100:231 and 88.86.100.231.

other host names for instance mx-01.zlatastezkaceskehoraje.cz, mx-01.pojisteni-online.cz, mx-01.infocentrum-turnov.cz, mx-01.butterfly.cz and mx-01.synagoga-turnov.cz share IP numbers with mx-01.jestedliberec.cz.

mx-01.jestedliberec.cz - robtex.com