`ktstrade.cz`

DNSSEC	⚠️ Not signed
A	85.163.105.252^{🇨🇿 CETIN-AS85.163.0.0/16 CETIN}
		PTR	`kremilek.zeron.cz`
NS	`ns2.web4u.cz` ⭐
		A	2a02:a40:100:28ff::12^{🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s.}
			PTR	`ns2.web4u.cz`
		A	85.207.53.12^{🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block}
			PTR	`ns2.web4u.cz`
NS	`ns.web4u.cz`
		A	2001:1568:fd::241^{🇨🇿 WEB4U2001:1568::/33}
			PTR	`ns.web4u.cz`
		A	185.14.224.241^{🇨🇿 WEB4U185.14.224.0/23}
			PTR	`ns.web4u.cz`
MX	`kremilek.zeron.cz` ⭐
		A	85.163.105.252^{🇨🇿 CETIN-AS85.163.0.0/16 CETIN}
			PTR	`kremilek.zeron.cz`
SOA	`ns.web4u.cz`admin@web4u.cz 2024-03-06 #7

`cz`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.ns.nic.cz` ⭐
	NS	`b.ns.nic.cz`
	NS	`c.ns.nic.cz`
	NS	`d.ns.nic.cz`
	SOA	`a.ns.nic.cz`hostmaster@nic.cz serial=1782319660

Subdomains

mail.ktstrade.cz

Same first word

ktstrade.com

ktstrade.cz

ktstrade.com.my

Similar names

tkstrade.co.uk

tkstrade.com

karstedt.com

tedstark.com

dktreats.com

karstedt.biz

DNS History

6 records (4 active, 2 former)

●NSns.web4u.cz2015-08-15 → 2026-06-24 · 2 obs

● 2015-08-15 12:16:30
● 2026-06-24 17:46:10

●NSns2.web4u.cz2015-08-15 → 2026-06-24 · 2 obs

● 2015-08-15 12:16:30
● 2026-06-24 17:46:10

●MXkremilek.zeron.cz2026-02-20 → 2026-06-24 · 3 obs

○ 2017-07-07 14:19:52
● 2026-02-20 18:19:26
● 2026-06-24 17:46:10

○MXmail.ktstrade.cz2015-08-15 → 2017-07-07 · 4 obs

● 2015-08-15 12:16:30
● 2017-07-07 14:19:52
○ 2026-02-20 18:19:26
○ 2026-06-24 17:46:10

○A77.236.210.22015-08-15 → 2017-07-07 · 4 obs

● 2015-08-15 12:16:30
● 2017-07-07 14:19:52
○ 2026-02-20 18:19:26
○ 2026-06-24 17:46:10

●A85.163.105.2522026-02-20 → 2026-06-24 · 3 obs

○ 2017-07-07 14:19:52
● 2026-02-20 18:19:26
● 2026-06-24 17:46:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	d.ns.nic.cz, c.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz	-
ktstrade.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: 1101ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`85.163.105.252`
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	1	`kremilek.zeron.cz (pri: 10)`
SOA	1	`ns.web4u.cz admin.web4u.cz`

📌 Glue Records Collected

Total: 4

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

Analysis

Hierarchy

ktstrade.cz is a parent domain of mail.ktstrade.cz.

IP Addresses

ktstrade.cz has exactly one IP address — 85.163.105.252.

charmander.cz, vysocan.eu, mail.ktstrade.cz plus two other host names have IP numbers in common with ktstrade.cz.

Name Servers

ktstrade.cz uses two name servers for its delegation: ns2.web4u.cz and ns.web4u.cz.

The name server configuration of ktstrade.cz is shared with other domains, for instance jp18.cz, audiso.eu, akvarko.cz and two others.

The two host names ns2.web4u.cz and ns.web4u.cz each have a pair of IP addresses: ns2.web4u.cz has 85.207.53.12 and 2a02:a40:100:28ff::12, and ns.web4u.cz has 185.14.224.241 and 2001:1568:fd::241.

Mail Servers

ktstrade.cz uses one mail server — kremilek.zeron.cz.

The mail server setup of ktstrade.cz is identical to that of domains like charmander.cz, holetin.net and hlinecko.cz.

kremilek.zeron.cz directs to just one IP number, 85.163.105.252.

ktstrade.cz - robtex.com

ktstrade.cz

cz