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

Network type: residential

AS57121 announces 5 IPv4 prefixes covering 7,424 addresses and 0 IPv6 prefixes.

About this network

The AS handle IT-SYSTEMATIC-GROUP is held by IT Systematic Group.

What it's used for

• The address space carries residential and business customer traffic, evidenced by reverse DNS entries like 176-96-171-254.host.systematic.pl and netnames PL-SYSTEMATIC-20110722 and PL-SYSTEMATIC-20191004.
• The network announces 7,424 IPv4 addresses across 5 prefixes and maintains 8 observed neighbours, a ratio consistent with a regional access provider rather than a transit carrier.
• As a cable and DSL ISP, the traffic consists of subscriber eyeballs and local business connectivity within its service area in Poland.

Notable

• All registrants for the announced prefixes are listed as Piotr Bukowczyk trading as IT Systematic Group, matching the AS holder.
• The inventory consists of five distinct IPv4 blocks, including a /20 and a /21, all located in Poland.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 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

Upstream networks

• AS50606 Horyzont Technologie Internetowe sp.z.o.o.
• AS201054 Stowarzyszenie e-Poludnie
• AS50607 Stowarzyszenie e-Poludnie
• AS3257 GTT Communications Inc.
• AS50625 Krosnienskie Centrum Informatyczne "KROSOFT"
• AS24482 SG.GS

Adjacent networks

• AS50606 Horyzont Technologie Internetowe sp.z.o.o.
• AS201054 Stowarzyszenie e-Poludnie
• AS50607 Stowarzyszenie e-Poludnie
• AS3257 GTT Communications Inc.
• AS50625 Krosnienskie Centrum Informatyczne "KROSOFT"
• AS24482 SG.GS

Routing security

• RPKI: 5 valid, 0 invalid and 0 not-found announcements; 5 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 6 route objects.
• Listed in as-sets: AS-50625, AS-EP-POLMIX, AS-EPIX, AS-EPIX-LOCAL, AS-EPIX-TRANSIT, AS-GTTCUST, AS-GTTCUST6, AS-KIKE, AS-RETN-ACTUAL-V4, AS-VIRTUAOPERATOR, AS5617:AS-PL, AS5617:AS-WORLD-TRANSIT, AS57121:AS-SYSTEMATIC.