Network Overview
| ASN | AS28571 |
| Organization | UNIVERSIDADE DE SAO PAULO |
| Announced IPv4 ranges | 12 |
| Total IPv4 addresses | 154,624 |
Sample IP Ranges Announced by AS28571
| Range Start | Range End | Lookup |
|---|---|---|
143.107.0.0 |
143.107.255.255 |
Details → |
177.90.64.0 |
177.90.255.255 |
Details → |
200.9.95.0 |
200.9.95.255 |
Details → |
200.17.16.0 |
200.17.31.255 |
Details → |
200.18.53.0 |
200.18.53.255 |
Details → |
200.18.106.0 |
200.18.109.255 |
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 AS28571?
AS28571 is the autonomous system operated by UNIVERSIDADE DE SAO PAULO, announcing 12 IPv4 ranges (154,624 addresses).
Who operates AS28571?
UNIVERSIDADE DE SAO PAULO. 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 AS28571?
Enter the IP into our free IP lookup - the result shows the ASN, operator, geolocation, and VPN/datacenter flags.
How many IP addresses does AS28571 have?
AS28571 currently announces approximately 154,624 IPv4 addresses across 12 ranges, according to public routing data.