WWW.RTSAK.COM - builder.cz

Search for IP or hostnames:

builder.cz checked at 2025-10-02T17:38:01.502Z 311ms 68/68/68 100% R:16

`builder.cz`

MX	`mail.builder.cz`
		A	81.91.84.134^{🇨🇿 WEB4U}
			PTR	`m105.server4u.cz`
NS	`ns2.web4u.cz`
		A	2a02:a40:100:28ff::12 ^{🇨🇿 Radiokomunikace}
			PTR	`ns2.web4u.cz`
		A	85.207.53.12^{🇨🇿 Radiokomunikace}
			PTR	`ns2.web4u.cz`
NS	`ns.web4u.cz`
		A	2001:1568:fd::241 ^{🇨🇿 WEB4U}
			PTR	`ns.web4u.cz`
		A	185.14.224.241^{🇨🇿 WEB4U}
			PTR	`ns.web4u.cz`
A	81.91.84.189^{🇨🇿 WEB4U}
		PTR	`wm103.web-media.cz`

`cz`

	NS	`a.ns.nic.cz`
	NS	`b.ns.nic.cz`
	NS	`c.ns.nic.cz`
	NS	`d.ns.nic.cz`

Up

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AI analysis

builder.cz is the parent of mail.builder.cz.

builder.cz resolves to a single IP address: 81.91.84.189.

Other host names including arten.cz, grafika.cz, mail.osapo.com, aliaz.cz and wm103.web-media.cz share IP numbers with builder.cz.

builder.cz's delegation uses two name servers, ns2.web4u.cz and ns.web4u.cz.

builder.cz shares the same name server setup as other domains, for example ikite.cz, moluft.com, votice.eu, eumedical.eu and sckolin.cz.

Host names with two IPs:

ns2.web4u.cz points to: 2a02:a40:100:28ff::12 and 85.207.53.12

ns.web4u.cz points to: 2001:1568:fd::241 and 185.14.224.241

builder.cz is handled by a single mail server, mail.builder.cz.

mail.builder.cz points to a single IP: 81.91.84.134.

dbq