AS15157 NORTHWESTERN CORPORATION

NORWORLD - NORTHWESTERN CORPORATION · registered in the United States

IPv4 addresses7682 prefixes · <0.001% of announced IPv4

Rank in United States#9,377largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#43,825of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS15157 in ASN lookup Look up an IP in this network (199.3.108.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

199.3.108.0/23
206.107.235.0/24

Other ASNs named NORTHWESTERN CORPORATION

1 other network uses the same organisation name; together with AS15157 they announce 3,840 IPv4 addresses.

ASNNameIPv4 addresses

AS22629NORWORLD - NORTHWESTERN CORPORATION US3,072

Similar-sized networks in United States

ASNNameIPv4 addresses

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AS15062#9376 MERIDIAN-BUSINESS-CENTERS - Meridian Business Centers768

AS15185#9378 HIBBERT-EAST - The Hibbert Group768

AS15197#9379 CONCORD - Concord Technologies768

AS15229#9380 EDFTNA - EDF Trading North America, LLC768

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