Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Enterprise allocation +4
- Trust score 69 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About University of São Paulo
The University of São Paulo is a public research university in the Brazilian state of São Paulo, and the largest public university in Brazil.
Network profile
Source: PeeringDB →Present at 1 internet exchange: IX.br (PTT.br) São Paulo: ATM/MPLA
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS28571 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 143.107.86.0/24 | 76,079 | 2026-09-11 17:56:07 |
| 143.107.84.0/23 | 76,012 | 2026-09-11 17:56:05 |
| 143.107.88.0/24 | 75,961 | 2026-09-11 17:56:13 |
| 143.107.27.0/24 | 75,602 | 2026-09-11 17:56:56 |
| 143.107.8.0/24 | 67,931 | 2026-09-11 17:56:43 |
| 200.144.236.0/24 | 66,718 | 2026-09-11 17:56:21 |
| 143.107.254.0/24 | 65,255 | 2026-09-11 17:58:05 |
| 143.107.178.0/23 | 64,911 | 2026-09-11 17:56:42 |
| 200.144.182.0/23 | 64,839 | 2026-09-11 17:56:56 |
| 143.107.252.0/24 | 64,178 | 2026-09-10 19:56:08 |
| 200.144.60.0/24 | 63,961 | 2026-09-11 17:56:42 |
| 200.9.95.0/24 | 63,209 | 2026-09-11 17:58:51 |
| 143.107.64.0/24 | 63,105 | 2026-09-11 17:56:49 |
| 143.107.154.0/24 | 62,834 | 2026-09-11 17:56:09 |
| 200.18.53.0/24 | 62,504 | 2026-09-11 17:58:51 |
| 200.144.239.0/24 | 62,325 | 2026-09-11 17:56:06 |
| 200.144.238.0/24 | 62,302 | 2026-09-11 17:55:59 |
| 143.107.44.0/23 | 62,047 | 2026-09-11 17:56:43 |
| 143.107.253.0/24 | 61,733 | 2026-09-11 17:56:02 |
| 200.144.180.0/23 | 61,614 | 2026-09-11 17:56:56 |
| 143.107.248.0/24 | 61,378 | 2026-09-11 17:56:35 |
| 143.107.3.0/24 | 61,179 | 2026-09-11 17:56:49 |
| 200.144.244.0/22 | 60,674 | 2026-09-11 17:56:56 |
| 200.144.254.0/23 | 60,548 | 2026-09-11 17:56:46 |
| 200.144.212.0/24 | 60,539 | 2026-09-11 17:56:56 |
| 200.144.248.0/24 | 60,507 | 2026-09-11 17:56:56 |
| 200.144.234.0/23 | 60,297 | 2026-09-11 17:56:15 |
| 200.144.184.0/21 | 60,069 | 2026-09-11 17:56:49 |
| 143.107.14.0/24 | 59,956 | 2026-09-11 17:58:19 |
| 200.144.250.0/23 | 59,943 | 2026-09-11 17:56:56 |
| 200.144.237.0/24 | 58,917 | 2026-09-11 17:56:24 |
| 200.144.252.0/23 | 58,763 | 2026-09-11 17:56:49 |
| 200.144.249.0/24 | 58,685 | 2026-09-11 17:56:56 |
| 200.144.72.0/23 | 53,877 | 2026-09-11 17:58:51 |
| 200.136.49.0/24 | 53,365 | 2026-09-11 17:58:51 |
| 200.18.106.0/23 | 52,071 | 2026-09-11 17:58:51 |
| 200.18.108.0/23 | 52,033 | 2026-09-11 17:58:51 |
| 200.136.54.0/24 | 46,819 | 2026-09-11 17:58:51 |
| 177.90.32.0/19 | 44,877 | 2026-09-11 17:58:51 |
| 143.107.0.0/16 | 38,946 | 2026-09-11 17:58:51 |
| 177.90.64.0/18 | 38,385 | 2026-09-11 17:58:51 |
| 177.90.128.0/17 | 38,332 | 2026-09-11 17:58:51 |
| 200.136.0.0/20 | 38,259 | 2026-09-11 17:58:51 |
| 200.136.52.0/23 | 38,155 | 2026-09-11 17:58:51 |
| 200.144.48.0/20 | 38,037 | 2026-09-11 17:58:51 |
| 200.17.16.0/20 | 37,812 | 2026-09-11 17:58:51 |
| 200.144.192.0/18 | 37,796 | 2026-09-11 17:58:51 |
| 200.144.160.0/19 | 37,724 | 2026-09-11 17:58:51 |
| 143.107.92.0/23 | 29,456 | 2026-07-16 19:27:28 |
| 200.144.62.0/23 | 20,659 | 2026-07-13 06:46:18 |
Showing top 50 of 710 announced prefixes by sample volume.
Frequently Asked Questions
What is AS28571?
AS28571 is an Autonomous System Number assigned to UNIVERSIDADE DE SAO PAULO. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS28571 announce?
AS28571 announces 162.8K IPv4 addresses distributed across 17 routed CIDR prefixes. The network is registered in Brazil.
Who operates AS28571?
AS28571 is operated by UNIVERSIDADE DE SAO PAULO. The organization is based in Brazil. You can view all IP ranges and related ASNs on the organization page.
What country is AS28571 registered in?
AS28571 is registered in Brazil. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
