Autonomous System
AS1251 · FUNDACAO DE AMPARO A PESQUISA DO ESTADO SAO PAULO
Overview
AS1251 is announced on the Internet: RIPE RIS route collectors currently see 40 IPv4 prefixes and 1 IPv6 prefix originated by this network. Together, its IPv4 prefixes cover 128,512 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 9 upstream neighbours (transit providers or peers) and 15 downstream neighbours (customers or networks it carries). Its most visible upstreams are Florida International University (AS20080), Equinix Equinix (EMEA) Acquisition Enterprises B.V. (AS15830), and Hurricane Electric LLC (AS6939). AS1251 was assigned by ARIN, and its registration country is Brazil.
Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 5:46 AM UTC. This page is refreshed at most every 12 hours.
Go further
The trace goes to 143.108.0.1, the first address of 143.108.0.0/16. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.
Announced prefixes
IPv4 prefixes (40 prefixes)
| Prefix | Addresses |
|---|---|
| 143.108.0.0/16 | 65,536 |
| 143.108.8.0/22 | 1,024 |
| 143.108.12.0/24 | 256 |
| 200.6.42.0/24 | 256 |
| 200.10.178.0/23 | 512 |
| 200.10.178.0/24 | 256 |
| 200.10.179.0/24 | 256 |
| 200.18.48.0/20 | 4,096 |
| 200.18.48.0/23 | 512 |
| 200.18.52.0/24 | 256 |
| 200.18.110.0/23 | 512 |
| 200.18.240.0/20 | 4,096 |
| 200.18.252.0/24 | 256 |
| 200.19.80.0/20 | 4,096 |
| 200.19.224.0/22 | 1,024 |
| 200.19.228.0/23 | 512 |
| 200.136.16.0/20 | 4,096 |
| 200.136.26.0/23 | 512 |
| 200.136.32.0/19 | 8,192 |
| 200.136.64.0/19 | 8,192 |
| 200.136.80.0/24 | 256 |
| 200.136.88.0/24 | 256 |
| 200.136.96.0/20 | 4,096 |
| 200.136.110.0/24 | 256 |
| 200.136.160.0/20 | 4,096 |
| 200.136.176.0/24 | 256 |
| 200.136.182.0/23 | 512 |
| 200.136.184.0/22 | 1,024 |
| 200.144.32.0/20 | 4,096 |
| 200.144.64.0/22 | 1,024 |
| 200.144.68.0/22 | 1,024 |
| 200.144.78.0/23 | 512 |
| 200.144.80.0/20 | 4,096 |
| 200.144.118.0/24 | 256 |
| 200.144.119.0/24 | 256 |
| 200.144.120.0/22 | 1,024 |
| 200.144.124.0/24 | 256 |
| 200.144.125.0/24 | 256 |
| 200.144.126.0/23 | 512 |
| 200.144.128.0/20 | 4,096 |
IPv6 prefixes (1 prefix)
| Prefix |
|---|
| 2001:12d8::/32 |
Neighbours
Upstreams (transit or peers) (9)
| AS | Network | Visibility |
|---|---|---|
| AS20080 | Florida International University | 1,882 |
| AS15830 | Equinix Equinix (EMEA) Acquisition Enterprises B.V. | 1,144 |
| AS6939 | Hurricane Electric LLC | 229 |
| AS1916 | Rede Nacional de Ensino e Pesquisa | 67 |
| AS137409 | GSL Networks Pty LTD | 16 |
| AS37468 | Angola Cables | 15 |
| AS6057 | Administracion Nacional de Telecomunicaciones | 14 |
| AS61626 | UNIVERSIDADE ESTADUAL DE PONTA GROSSA | 4 |
| AS7195 | EDGEUNO S.A.S | 2 |
Downstreams (customers) (15)
| AS | Network | Visibility |
|---|---|---|
| AS53166 | UNIVERSIDADE ESTADUAL PAULISTA | 501 |
| AS52888 | UNIVERSIDADE FEDERAL DE SAO CARLOS | 472 |
| AS52992 | UNIVERSIDADE FEDERAL DE SAO PAULO | 277 |
| AS271755 | UNIVERSIDADE DE SAO PAULO | 277 |
| AS61612 | DEPARTAMENTO DE CIENCIA E TECNOLOGIA AEROESPACIAL | 259 |
| AS28571 | UNIVERSIDADE DE SAO PAULO | 255 |
| AS262742 | Fundacao Universidade Federal do ABC - UFABC | 255 |
| AS52890 | Centro Integrado de Telematica do Exercito | 204 |
| AS11097 | EMPRESA BRASILEIRA DE PESQUISA AGROPECUARIA | 25 |
| AS1916 | Rede Nacional de Ensino e Pesquisa | 21 |
| AS263605 | - | 20 |
| AS265478 | - | 19 |
| AS53187 | - | 17 |
| AS52914 | - | 11 |
| AS28222 | - | 7 |
27 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.
Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.
How to read this page
An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.
A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.
Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.
The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.