Network Overview

ASNAS203258
OrganizationUCNS Limited
Announced IPv4 ranges2
Total IPv4 addresses1,280

Sample IP Ranges Announced by AS203258

Range StartRange EndLookup
178.21.32.0 178.21.34.255 Details →
178.21.38.0 178.21.39.255 Details →

What Is an Autonomous System?

An autonomous system (AS) is a collection of IP networks operated by a single organization - an ISP, cloud provider, enterprise, or university - that shares a common routing policy. Each AS is identified by a unique AS number (ASN) and exchanges routing information with other systems using the BGP protocol.

Knowing which ASN an IP belongs to reveals who actually operates the network behind it - useful for fraud analysis, traffic quality assessment, and abuse investigation. Use the IP lookup tool to find the ASN for any address.

Frequently Asked Questions

What is AS203258?

AS203258 is the autonomous system operated by UCNS Limited, announcing 2 IPv4 ranges (1,280 addresses).

Who operates AS203258?

UCNS Limited. An autonomous system is a network under a single administrative entity that exchanges routes with other networks via BGP.

How do I check if an IP belongs to AS203258?

Enter the IP into our free IP lookup - the result shows the ASN, operator, geolocation, and VPN/datacenter flags.