`sql.igorholub.cz`

DNSSEC	⚠️ Not signed
A	136.243.20.99^{🇩🇪 Hetzner136.243.0.0/16 HETZNER-RZ-BLK-ERX3}
		PTR	`host.vipnet.cz`

`igorholub.cz`

	DNSSEC	🔒 Signed (DS record present)
	A	136.243.20.99^{🇩🇪 Hetzner136.243.0.0/16 HETZNER-RZ-BLK-ERX3}
	NS	`ns2.web4u.cz` ⭐
	NS	`ns.web4u.cz`
	MX	`testmail.vipnet.cz` ⭐
	TXT	`v=spf1 a mx -all`
	SOA	`ns.web4u.cz`admin@web4u.cz 2012-06-30 #1

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DNS History

1 record (1 active, 0 former)

●A136.243.20.992026-03-14 → 2026-03-14 · 2 obs

● 2026-03-14 09:43:48
● 2026-03-14 09:43:50

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server: 85.207.53.12

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

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1273ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`136.243.20.99`

📌 Glue Records Collected

Total: 4

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

Analysis

IP Addresses

sql.igorholub.cz points to an IP address: 136.243.20.99.

other host names include parking.igorholub.cz, atoma.cz, www.vipnet.cz, lpg-stanice.cz and 02.vipnet.cz; they share IP numbers with sql.igorholub.cz.

sql.igorholub.cz - robtex.com

sql.igorholub.cz

igorholub.cz