`mail.fe-development.cz`

DNSSEC	⚠️ Not signed
A	185.66.36.222^{🇨🇿 GIGASERVER185.66.36.0/22 CZ-SEONET-20140805}
		PTR	`mail.gigaserver.cz`

`fe-development.cz`

	DNSSEC	🔒 Signed (DS record present)
	A	185.66.36.45^{🇨🇿 GIGASERVER185.66.36.0/22 CZ-SEONET-20140805}
	NS	`1.ns.gigaserver.cz` ⭐
	NS	`2.ns.gigaserver.cz`
	NS	`3.ns.gigaserver.cz`
	NS	`4.ns.gigaserver.cz`
	MX	`mail.gigaserver.cz` ⭐
	TXT	`v=spf1 mx a include:smtp-gw.gigaserver.cz ~all`
	SOA	`1.ns.gigaserver.cz`dns@gigaserver.cz serial=1545516471

Previously MX for

fe-development.cz

Same first word

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DNS History

2 records (1 active, 1 former)

●A185.66.36.2222026-04-15 → 2026-04-15 · 2 obs

○ 2016-07-26 20:21:18
● 2026-04-15 18:01:46

○A85.118.128.32015-05-23 → 2016-07-26 · 3 obs

● 2015-05-23 23:14:16
● 2016-07-26 20:21:18
○ 2026-04-15 18:01:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz	-
fe-development.cz	1.ns.gigaserver.cz, 2.ns.gigaserver.cz, 3.ns.gigaserver.cz, 4.ns.gigaserver.cz	4 records

✅ Authoritative Response

Server:185.66.36.92

NS records: 1.ns.gigaserver.cz, 2.ns.gigaserver.cz, 3.ns.gigaserver.cz, 4.ns.gigaserver.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1078ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`185.66.36.222`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (1.ns.gigaserver.cz, 2.ns.gigaserver.cz, 3.ns.gigaserver.cz...)

Analysis

IP Addresses

mail.fe-development.cz points to a single IP address: 185.66.36.222.

Other host names such as mail.marcin.cz, mail.assmann.cz, mail.sirall.cz, mail.mt-studio.cz and mail.growgo.at share IP numbers with mail.fe-development.cz.

mail.fe-development.cz - robtex.com