AS1251 FUNDACAO DE AMPARO A PESQUISA DO ESTADO SAO PAULO

AS1251 - FUNDACAO DE AMPARO A PESQUISA DO ESTADO SAO PAULO · registered in Brazil

IPv4 addresses121,60049 prefixes · 0.004% of announced IPv4

Rank in Brazil#33largest network in BR by IPv4 space, of 7,969 · 0.16% of BR

Rank worldwide#1,698of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryBrazil8,771 ASNs registered there

Open AS1251 in ASN lookup Look up an IP in this network (143.108.0.1) All networks in Brazil

IPv4 prefixes

All 49 prefixes, in address order.

143.108.0.0/16
200.6.42.0/24
200.10.178.0/23
200.18.48.0/22
200.18.52.0/24
200.18.54.0/23
200.18.56.0/21
200.18.110.0/23
200.18.240.0/21
200.18.248.0/22
200.18.252.0/24
200.18.253.0/24
200.18.254.0/23
200.19.88.0/21
200.19.224.0/22
200.19.228.0/23
200.136.16.0/21
200.136.24.0/22
200.136.28.0/22
200.136.32.0/20
200.136.48.0/24
200.136.50.0/23
200.136.55.0/24
200.136.56.0/21
200.136.64.0/20
200.136.80.0/21
200.136.88.0/24
200.136.89.0/24
200.136.90.0/23
200.136.92.0/22
200.136.104.0/22
200.136.108.0/23
200.136.110.0/24
200.136.160.0/20
200.136.176.0/24
200.136.182.0/23
200.136.184.0/22
200.144.32.0/20
200.144.64.0/21
200.144.78.0/23
200.144.81.0/24
200.144.82.0/23
200.144.84.0/22
200.144.88.0/23
200.144.90.0/24
200.144.95.0/24
200.144.118.0/23
200.144.120.0/21
200.144.128.0/20

IPv6 prefixes

All 1 prefix.

2001:12d8::/32

Similar-sized networks in Brazil

ASNNameIPv4 addresses

AS17222#30 AS17222 - MUNDIVOX DO BRASIL LTDA136,704

AS53166#31 AS53166 - UNIVERSIDADE ESTADUAL PAULISTA131,072

AS53237#32 AS53237 - TELECOMUNICACOES BRASILEIRAS S. A. - TELEBRAS124,928

AS10881#34 AS10881 - FUNPAR - Fundacao da UFPR para o DCTC114,688

AS2716#35 AS2716 - Universidade Federal do Rio Grande do Sul113,408

AS53187#36 AS53187 - UNIVERSIDADE ESTADUAL DE CAMPINAS102,400

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources