AS28576 ITIBR - Instituto de Tecnologia Informacao Brasil

AS28576 - ITIBR - Instituto de Tecnologia Informacao Brasil · registered in Brazil

IPv4 addresses8,96015 prefixes · <0.001% of announced IPv4

Rank in Brazil#313largest network in BR by IPv4 space, of 7,969 · 0.01% of BR

Rank worldwide#9,735of 79,396 networks with IPv4

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

CountryBrazil8,771 ASNs registered there

Open AS28576 in ASN lookup Look up an IP in this network (187.73.128.1) All networks in Brazil

IPv4 prefixes

All 15 prefixes, in address order.

187.73.128.0/23
187.73.130.0/24
187.73.131.0/24
187.73.132.0/24
187.73.133.0/24
187.73.134.0/23
189.38.16.0/23
189.38.19.0/24
189.38.20.0/23
189.38.24.0/21
200.220.144.0/23
200.220.146.0/24
200.220.147.0/24
200.220.148.0/23
200.220.152.0/21

IPv6 prefixes

All 1 prefix.

2804:3c::/32

Similar-sized networks in Brazil

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AS262814#314 AS262814 - ALGAR TECNOLOGIA E CONSULTORIA SA8,960

AS53162#315 AS53162 - VOIPGLOBE SERVICOS DE COM MULTIMIDIA VIA INTERNET8,704

AS262544#316 AS262544 - RazaoInfo Internet Ltda8,704

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