AS7256 Viacom Inc.

VIACOM-AS - Viacom Inc. · registered in the United States

IPv4 addresses9,21619 prefixes · <0.001% of announced IPv4

Rank in United States#3,079largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#9,586of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS7256 in ASN lookup Look up an IP in this network (166.77.0.1) All networks in United States

IPv4 prefixes

All 19 prefixes, in address order.

166.77.0.0/23
166.77.3.0/24
166.77.4.0/24
166.77.10.0/24
166.77.16.0/23
166.77.23.0/24
166.77.24.0/24
166.77.26.0/24
166.77.36.0/24
166.77.38.0/24
166.77.60.0/23
166.77.62.0/24
166.77.100.0/22
166.77.111.0/24
204.110.112.0/22
204.110.116.0/24
204.110.117.0/24
204.110.118.0/23
204.110.120.0/21

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AS11300#3081 GLOBECOMM-11300 - Globecomm Services Maryland LLC9,216

AS13438#3082 VIVIO-TECHNOLOGIES - Vivio Technologies9,216

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