AS57121 IT-SYSTEMATIC-GROUP Piotr Bukowczyk trading as IT Systematic Group

IT-SYSTEMATIC-GROUP Piotr Bukowczyk trading as IT Systematic Group · registered in Poland

IPv4 addresses7,4245 prefixes · <0.001% of announced IPv4

Rank in Poland#175largest network in PL by IPv4 space, of 2,091 · 0.04% of PL

Rank worldwide#11,323of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryPoland2,145 ASNs registered there

Open AS57121 in ASN lookup Look up an IP in this network (91.230.221.1) All networks in Poland

IPv4 prefixes

All 5 prefixes, in address order.

91.230.221.0/24
176.96.144.0/21
176.96.160.0/20
192.109.84.0/23
192.109.132.0/23

Similar-sized networks in Poland

ASNNameIPv4 addresses

AS39039#172 STANSAT Stansat Stanislaw Grzesik7,680

AS61154#173 INTEGRADESIGN IDHosting Sp. z o. o.7,424

AS35174#174 NFB-AS Network For Business Sp z o.o.7,424

AS8819#176 PL-METROINTERNET Metro Internet Sp. z o.o.7,168

AS44454#177 CSMNP-AS Czestochowska Spoldzielnia Mieszkaniowa "Nasza Praca"7,168

AS13065#178 ZIELMAN-COM-AS Uniwersytet Zielonogorski7,168

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources