AS8047 — GCI

Network type: residential

AS8047 announces 17 IPv4 prefixes covering 323,840 addresses and 1 IPv6 prefixes.

About this network

GCI is General Communication, Inc., Alaska's largest telecommunications company and by far the dominant broadband provider in the state.

What it's used for

• Consumer and business internet access across Alaska — cable, fibre and fixed wireless. Every sampled prefix resolves under gci.net, with the classic reversed-octet subscriber pattern (NN-NN-NNN-NN.gci.net) for dynamic addresses and a .static.gci.net suffix for static assignments.
• GCI's own backbone, and the long-haul and satellite links that connect remote Alaskan communities.

Notable

• This is an eyeball network: an IP in AS8047 is almost always a subscriber, and almost always physically in Alaska. Address blocks like 24.237.0.0/16 and 209.165.128.0/18 are registered to GCI directly.
• Because GCI covers so much of the state, the AS is effectively a proxy for "consumer internet user in Alaska" — a useful signal, since very few other networks serve that geography at scale.

Interesting

• Serving Alaska means serving places with no road access, so GCI's network leans on undersea fibre, microwave and satellite backhaul to a degree almost no other US broadband operator has to.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 24.237.0.0/16
• 64.110.28.0/22
• 65.74.0.0/17
• 66.58.128.0/17
• 66.223.128.0/17
• 67.58.0.0/19
• 69.178.0.0/17
• 72.42.128.0/18
• 76.78.180.0/24
• 198.99.16.0/21
• 198.99.24.0/23
• 198.185.228.0/24
• 205.148.192.0/18
• 205.159.28.0/24
• 206.162.0.0/17
• 206.174.0.0/17
• 209.165.128.0/18
• 2610:100::/31

Upstream networks

• AS2914 NTT America, Inc.
• AS7922 Comcast Cable Communications, LLC
• AS6939 Hurricane Electric LLC
• AS9002 RETN Limited
• AS24482 SG.GS
• AS394256 Tech Futures Interactive Inc.
• AS3130 RGnet OU
• AS7575 Australian Academic and Research Network (AARNet)
• AS34927 iFog GmbH
• AS52025 ParadoxNetworks Limited

Downstream networks

• AS22284 U.S. Department of the Interior
• AS22079 Alaska Power & Telephone Company
• AS396006 SPITwSPOTS
• AS33707 Nushagak Electric & Telephone Cooperative, Inc.
• AS10538 TelAlaska
• AS27575 Providence Hospital
• AS397388 Bristol Bay Telephone
• AS14789 Cloudflare, Inc.
• AS15269 ConocoPhillips Company
• AS62680 City & Borough of Juneau
• AS397548 Yakutat Telecom Company, LLC
• AS53469 Kenai Peninsula Borough School District
• AS396114 SEARHC
• AS5062 Applied Microsystems, Inc.
• AS397349 Mutable
• AS40094 Southcentral Foundation
• AS33168 INLAND IMAGING L.L.C.
• AS40226 Global Credit Union
• AS36056 Alaska Native Medical Center
• AS397082 Arctic Slope Regional Corporation
• AS18443 Alyeska Pipeline Service Company
• AS397967 Cook Inlet Region, Inc.
• AS397824 Alaska Permanent Fund Corporation, an instrumentality of the State of Alaska
• AS21528 AlasConnect Inc.
• AS398361 Horizon Satellite, LLC

Adjacent networks

• AS2914 NTT America, Inc.
• AS7922 Comcast Cable Communications, LLC
• AS22284 U.S. Department of the Interior
• AS22079 Alaska Power & Telephone Company
• AS396006 SPITwSPOTS
• AS6939 Hurricane Electric LLC
• AS33707 Nushagak Electric & Telephone Cooperative, Inc.
• AS9002 RETN Limited
• AS10538 TelAlaska
• AS27575 Providence Hospital
• AS397388 Bristol Bay Telephone
• AS24482 SG.GS
• AS394256 Tech Futures Interactive Inc.
• AS3130 RGnet OU
• AS7575 Australian Academic and Research Network (AARNet)
• AS14789 Cloudflare, Inc.
• AS15269 ConocoPhillips Company
• AS34927 iFog GmbH
• AS53469 Kenai Peninsula Borough School District
• AS62680 City & Borough of Juneau
• AS397548 Yakutat Telecom Company, LLC
• AS396114 SEARHC
• AS5062 Applied Microsystems, Inc.
• AS397349 Mutable
• AS40094 Southcentral Foundation

Internet exchanges

• Seattle Internet Exchange — Seattle, United States
• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States