AS16591 Google Fiber Inc.

GOOGLE-FIBER - Google Fiber Inc. · registered in the United States

IPv4 addresses2,244,60860 prefixes · 0.072% of announced IPv4

Rank in United States#56largest network in US by IPv4 space, of 18,338 · 0.16% of US

Rank worldwide#180of 79,396 networks with IPv4

IPv62 x /32 (131,072 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS16591 in ASN lookup Look up an IP in this network (23.228.128.1) All networks in United States

IPv4 prefixes

All 60 prefixes, in address order.

23.228.128.0/18
23.255.128.0/17
45.56.0.0/18
99.198.128.0/17
107.188.128.0/17
136.32.0.0/14
136.36.0.0/20
136.36.16.0/24
136.36.17.0/24
136.36.18.0/23
136.36.20.0/22
136.36.24.0/21
136.36.32.0/19
136.36.64.0/18
136.36.128.0/17
136.37.0.0/16
136.38.0.0/15
136.40.0.0/14
136.44.0.0/15
136.46.0.0/17
136.46.128.0/19
136.46.160.0/20
136.46.176.0/20
136.46.192.0/18
136.47.0.0/19
136.47.32.0/20
136.47.48.0/20
136.47.64.0/20
136.47.80.0/20
136.47.96.0/20
136.47.112.0/20
136.47.128.0/17
136.48.0.0/18
136.48.64.0/19
136.48.96.0/20
136.48.112.0/20
136.48.128.0/17
136.49.0.0/16
136.50.0.0/15
136.52.0.0/15
136.54.0.0/16
136.55.0.0/17
136.55.128.0/17
136.56.0.0/15
136.58.0.0/16
136.59.0.0/19
136.59.32.0/20
136.59.48.0/20
136.59.64.0/18
136.59.128.0/17
136.60.0.0/18
136.60.64.0/19
136.60.96.0/20
136.60.112.0/20
136.60.128.0/17
136.61.0.0/16
136.62.0.0/15
192.119.16.0/20
192.200.224.0/19
216.21.160.0/20

IPv6 prefixes

All 1 prefix.

2605:a600::/31

Similar-sized networks in United States

ASNNameIPv4 addresses

AS668#53 DNIC-AS-00668 - United States Department of Defense (DoD)2,549,504

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AS33651#55 CMCS - Comcast Cable Communications, LLC2,267,136

AS237#57 MERIT-AS-14 - Merit Network Inc.2,209,148

AS81#58 NCREN - MCNC1,957,376

AS2152#59 CENIC-2152 - CENIC1,916,161

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