`racomputer.cz`

DNSSEC	🔒 Signed (DS record present)
A	217.195.169.189^{🇨🇿 CentroNetAS217.195.160.0/20 CENTRONET}
		PTR	`189-169-195-217.cust.centrio.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	`racomputer-cz.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::5^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db3pr0202cu00205.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::9^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00601.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::c^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db9pr02cu00204.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::2^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am0pr83cu00402.inbound.protection.outlook.com`
		A	52.101.68.5^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-du2pr03cu00105.inbound.protection.outlook.com`
		A	52.101.68.15^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db6pr03cu00107.inbound.protection.outlook.com`
		A	52.101.73.4^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am0pr83cu00404.inbound.protection.outlook.com`
		A	52.101.73.6^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am6pr04cu00306.inbound.protection.outlook.com`
TXT	`google-site-verification=Lf0QHUHHx2A49grcFtnHK5xScaFUOkWn-r1FY1FkSSw`
TXT	`v=spf1 include:_spf.web4u.cz include:spf.protection.outlook.com -all`
SOA	`ns.web4u.cz`admin@web4u.cz 2026-04-08 #0

`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=1783923441

Same first word

racomputer.it

racomputer.cz

Similar names

DNS History

9 records (4 active, 5 former)

●NSns.web4u.cz2015-07-16 → 2026-07-13 · 2 obs

● 2015-07-16 06:27:58
● 2026-07-13 07:12:04

●NSns2.web4u.cz2015-07-16 → 2026-07-13 · 2 obs

● 2015-07-16 06:27:58
● 2026-07-13 07:12:04

○MXmail.racomputer.cz2015-07-16 → 2017-03-29 · 4 obs

● 2015-07-16 06:27:58
● 2017-03-29 21:51:10
○ 2026-06-13 02:54:58
○ 2026-07-13 07:12:04

●MXracomputer-cz.mail.protection.outlook.com2026-06-13 → 2026-07-13 · 3 obs

○ 2017-03-29 21:51:10
● 2026-06-13 02:54:58
● 2026-07-13 07:12:04

○A2001:1568::122015-11-25 → 2017-03-29 · 5 obs

○ 2015-07-16 06:27:58
● 2015-11-25 15:34:24
● 2017-03-29 21:51:10
○ 2026-06-13 02:54:58
○ 2026-07-13 07:12:04

○A2001:1568::132015-07-16 → 2015-07-16 · 3 obs

● 2015-07-16 06:27:58
○ 2015-11-25 15:34:24
○ 2026-07-13 07:12:04

●A217.195.169.1892026-06-13 → 2026-07-13 · 3 obs

○ 2017-03-29 21:51:10
● 2026-06-13 02:54:58
● 2026-07-13 07:12:04

○A81.91.86.122015-11-25 → 2017-03-29 · 5 obs

○ 2015-07-16 06:27:58
● 2015-11-25 15:34:24
● 2017-03-29 21:51:10
○ 2026-06-13 02:54:58
○ 2026-07-13 07:12:04

○A81.91.86.132015-07-16 → 2015-07-16 · 3 obs

● 2015-07-16 06:27:58
○ 2015-11-25 15:34:24
○ 2026-07-13 07:12:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	b.ns.nic.cz, a.ns.nic.cz, d.ns.nic.cz, c.ns.nic.cz	-
racomputer.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: 674ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`217.195.169.189`
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	1	`racomputer-cz.mail.protection.outlook.co`
TXT	2	`google-site-verification=Lf0QHUHHx2A49gr, v=spf1 include:_spf.web4u.cz include:spf`
SOA	1	`ns.web4u.cz admin.web4u.cz`

📌 Glue Records Collected

Total: 4

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

Analysis

IP Addresses

racomputer.cz resolves to just one IP address, 217.195.169.189.

Name Servers

Two name servers handle the delegation for racomputer.cz: ns2.web4u.cz and ns.web4u.cz.

racomputer.cz shares its NS records with other domains, for example azalka.cz, cbe.cz, prstage.cz and two others.

ns2.web4u.cz and ns.web4u.cz both carry two IP addresses. The A records for ns2.web4u.cz are 85.207.53.12 and 2a02:a40:100:28ff::12; the A records for ns.web4u.cz are 185.14.224.241 and 2001:1568:fd::241.

Mail Servers

The sole mail server for racomputer.cz is racomputer-cz.mail.protection.outlook.com.

With 8 IP addresses total, racomputer-cz.mail.protection.outlook.com resolves to 52.101.68.5, 52.101.68.15, 52.101.73.4 and 5 others.

racomputer.cz - robtex.com

racomputer.cz

cz