`mail.igo.cz`

DNSSEC	⚠️ Not signed
A	81.91.84.133^{🇨🇿 WEB4U81.91.80.0/21}
		PTR	`m104.server4u.cz`

`igo.cz`

	DNSSEC	🔒 Signed (DS record present)
	A	81.91.84.133^{🇨🇿 WEB4U81.91.80.0/21}
	NS	`ns2.web4u.cz` ⭐
	NS	`ns.web4u.cz`
	MX	`mail.igo.cz` ⭐
	SOA	`ns.web4u.cz`admin@web4u.cz 2010-03-10 #1

MX for

igo.cz

Same first word

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DNS History

1 record (1 active, 0 former)

●A81.91.84.1332015-06-10 → 2026-08-09 · 2 obs

● 2015-06-10 02:30:34
● 2026-08-09 00:18:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	b.ns.nic.cz, d.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz	-
igo.cz	ns.web4u.cz, ns2.web4u.cz	4 records

✅ Authoritative Response

Server:185.14.224.241

NS records: ns.web4u.cz, ns2.web4u.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 781ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.91.84.133`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns.web4u.cz, ns2.web4u.cz, ns.web4u.cz...)

Analysis

Mail Server Role

Mail for igo.cz is routed through the mail server mail.igo.cz.

IP Addresses

mail.igo.cz has exactly one IP address — 81.91.84.133.

igocz.cz, www.bike-sport-shop.cz, apache-bike.cz plus two other host names have IP numbers in common with mail.igo.cz.

mail.igo.cz - robtex.com

mail.igo.cz

igo.cz