AS25143 — IU-AS Internet-Ukraine LLC

AS25143 announces 3 IPv4 prefixes covering 3,072 addresses and 0 IPv6 prefixes.

About this network

IU-AS is the AS handle for Zagalni Merezhi Ltd, a Ukrainian network operator.

What it's used for

• The address space carries general network traffic, indicated by the netname GENERAL-NETWORKS across all prefixes.
• The single reverse DNS record fmi-254.ipm.lviv.ua suggests connectivity to or service for the Lviv region, specifically referencing an IPM (Internet Provider of Ukraine) domain.
• With 3072 IPv4 addresses announced across 3 prefixes and 10 observed neighbours, the ratio indicates a mid-sized access or regional business network rather than a large transit provider.

Notable

• All three announced prefixes share the same registrant, Company "Zagalni Merezhi" Ltd, and the netname GENERAL-NETWORKS, showing consistent ownership and naming.
• The inventory consists of three /22 blocks, all located in Ukraine, with no IPv6 prefixes announced.
• The AS has been visible in routing tables since 2003, indicating a long-standing presence in the Ukrainian internet infrastructure.

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

Announced prefixes

• 91.239.48.0/22
• 193.19.228.0/22
• 193.238.20.0/22

Upstream networks

• AS3255 LLC EKSINTECH
• AS9002 RETN Limited
• AS48422 IT-STARCOM LLC
• AS29074 FAUST ISP LTD.
• AS28917 Fiord Networks, UAB
• AS3303 Swisscom (Schweiz) AG

Downstream networks

• AS25529 SOKIL LTD

Adjacent networks

• AS3255 LLC EKSINTECH
• AS48422 IT-STARCOM LLC
• AS9002 RETN Limited
• AS25529 SOKIL LTD
• AS29074 FAUST ISP LTD.
• AS28917 Fiord Networks, UAB
• AS3303 Swisscom (Schweiz) AG

Routing security

• RPKI: 12 valid, 0 invalid and 0 not-found announcements; 12 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 12 route objects.
• Listed in as-sets: AS-CRIMEACOM, AS-FAUST, AS-HURRICANE, AS-IU, AS-IU-CL, AS-IU-DTEL-IX, AS-IU-UAIX, AS-KHARKOV-IX:AS25143, AS-RETN-ACTUAL-V4, AS-TRANSROUTE-SPEC, AS-UARNET, AS-UARNET-IX, AS-UNREN, AS41161:AS-CUSTOMERS.