CF1763492254468-tsm20251116095642

IPLIST.NET - system4u.cz

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system4u.cz checked at 2025-11-18T18:57:34.407Z 851ms 134/134/134 100% R:12 allDone:true timedOut:false

system4u.cz

NSquentin.ns.cloudflare.com
A2606:4700:58::a29f:2c07 🇺🇸 Cloudflare
PTRquentin.ns.cloudflare.com
A2803:f800:50::6ca2:c307 🇨🇷 Cloudflare
PTRquentin.ns.cloudflare.com
A2a06:98c1:50::ac40:2307 🇺🇸 Cloudflare
PTRquentin.ns.cloudflare.com
A108.162.195.7🇺🇸 Cloudflare
PTRquentin.ns.cloudflare.com
A162.159.44.7 Cloudflare
PTRquentin.ns.cloudflare.com
A172.64.35.7🇺🇸 Cloudflare
PTRquentin.ns.cloudflare.com
NSthea.ns.cloudflare.com
A2606:4700:50::a29f:26f7 🇺🇸 Cloudflare
PTRthea.ns.cloudflare.com
A2803:f800:50::6ca2:c2f7 🇨🇷 Cloudflare
PTRthea.ns.cloudflare.com
A2a06:98c1:50::ac40:22f7 🇺🇸 Cloudflare
PTRthea.ns.cloudflare.com
A108.162.194.247🇺🇸 Cloudflare
PTRthea.ns.cloudflare.com
A162.159.38.247 Cloudflare
PTRthea.ns.cloudflare.com
A172.64.34.247🇺🇸 Cloudflare
PTRthea.ns.cloudflare.com
MXsystem4u-cz.mail.protection.outlook.com
A2a01:111:f403:ca04::10 🇮🇪 Microsoft
PTRmail-dbapr03cu00100.inbound.protection.outlook.com
A2a01:111:f403:ca09::b 🇳🇱 Microsoft
PTRmail-am7pr05cu00103.inbound.protection.outlook.com
A2a01:111:f403:ca09::d 🇳🇱 Microsoft
PTRmail-as9pr05cu01305.inbound.protection.outlook.com
A2a01:111:f403:ca09::f 🇳🇱 Microsoft
PTRmail-am7pr05cu00307.inbound.protection.outlook.com
A52.101.68.15🇮🇪 Microsoft
PTRmail-db6pr03cu00107.inbound.protection.outlook.com
A52.101.68.27🇮🇪 Microsoft
PTRmail-db7pr03cu00503.inbound.protection.outlook.com
A52.101.68.36🇮🇪 Microsoft
PTRmail-db5pr02cu00104.inbound.protection.outlook.com
A52.101.73.30🇳🇱 Microsoft
PTRmail-am7pr05cu00306.inbound.protection.outlook.com
A37.9.175.163🇸🇰 WEBSUPPORT-SRO-SK-AS
PTRing.r3.websupport.sk

cz

NSa.ns.nic.cz
NSb.ns.nic.cz
NSc.ns.nic.cz
NSd.ns.nic.cz

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AI analysis

system4u.cz is a parent of 83gate4u.system4u.cz, spamfilter01.system4u.cz, 60gate4u.system4u.cz, 26gate4u.system4u.cz, 17gate4u.system4u.cz and a few other host names.

system4u.cz points to a single IP: 37.9.175.163.

Other host names, for instance www.suska.cz, nubilis.cz, www.tainet.cz, iihas.com and naviterier.com share IP numbers with system4u.cz.

Two name servers quentin.ns.cloudflare.com and thea.ns.cloudflare.com handle delegation for system4u.cz.

system4u.cz uses the same name server setup as other domains, for example system4u.com, d-g-s.ru, shop-igenics.com, us-us-primebiome.us and retsneakers.com.

system4u.cz partially shares name servers with other domains; examples include kopro-porno.com, nananetsupplyonline.com, eicolumbaira.es, clusterdns.com and mammatroia.com.

These name servers are commonly used with ezra.ns.cloudflare.com, elsa.ns.cloudflare.com and shubhi.ns.cloudflare.com.

Host names with six IP numbers: quentin.ns.cloudflare.com points to: 2606:4700:58::a29f:2c07, 2803:f800:50::6ca2:c307, 2a06:98c1:50::ac40:2307, 108.162.195.7, 162.159.44.7 and 172.64.35.7; thea.ns.cloudflare.com points to: 2606:4700:50::a29f:26f7, 2803:f800:50::6ca2:c2f7, 2a06:98c1:50::ac40:22f7, 108.162.194.247, 162.159.38.247 and 172.64.34.247.

system4u.cz is handled by a single mail server, system4u-cz.mail.protection.outlook.com.

Hostname system4u-cz.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:ca04::10, 2a01:111:f403:ca09::b, 2a01:111:f403:ca09::d, 2a01:111:f403:ca09::f, 52.101.68.15, 52.101.68.27, 52.101.68.36 and 52.101.73.30.

Perform reverse DNS lookup as well as normal forward DNS. Check Autonomous System Numbers (ASNs) and BGP connections between Internet Service Providers.
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