AS266387 World Fast Telecomunicacoes ME

AS266387 - World Fast Telecomunicacoes ME · registered in Brazil

IPv4 addresses2,0484 prefixes · <0.001% of announced IPv4

Rank in Brazil#1,762largest network in BR by IPv4 space, of 7,969 · <0.01% of BR

Rank worldwide#22,205of 79,396 networks with IPv4

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

CountryBrazil8,771 ASNs registered there

Open AS266387 in ASN lookup Look up an IP in this network (170.81.20.1) All networks in Brazil

IPv4 prefixes

All 4 prefixes, in address order.

170.81.20.0/22
191.37.140.0/23
191.37.142.0/24
191.37.143.0/24

IPv6 prefixes

All 1 prefix.

2804:3710::/32

Similar-sized networks in Brazil

ASNNameIPv4 addresses

AS266299#1759 AS266299 - MARCOS SINDOR RIBEIRAO BRANCO EIRELI - ME2,048

AS266300#1760 AS266300 - FUSAO TELECOM LTDA. - ME2,048

AS266366#1761 AS266366 - GIGA NET TELECOMUNICACOES EIRELI - ME2,048

AS266438#1763 AS266438 - GNS FIBRA2,048

AS266439#1764 AS266439 - Infomaxx Telecom LTDA2,048

AS266454#1765 AS266454 - EXPAND TELECOM LTDA2,048

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