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Chicago, Illinois, United States

Networks whose geofeeds place IP prefixes here. IP-derived locations are approximate: a prefix placed here serves people in or around this city, not a street address.

Place details

Type
city
Region
Illinois (US-IL)
Country
United States (US)
Time zone
America/Chicago
Place centre
41.8500, -87.6500
GeoNames
4887398 ↗

Published prefixes

9,544 prefixes in Fastah's public IP data (6,807 IPv4, 2,737 IPv6). The first 100, in address order:
2.16.116.0/242.16.232.0/222.17.80.0/202.17.216.0/242.18.40.0/242.19.32.0/222.20.68.0/242.22.160.0/212.56.222.0/242.56.223.0/243.2.36.64/293.2.36.96/293.2.47.56/298.6.144.0/248.42.8.136/298.42.8.160/298.42.8.168/298.192.108.64/26
Show 82 more
9.129.47.0/259.129.58.48/289.129.67.144/289.129.68.0/229.129.72.0/219.129.112.0/249.129.116.0/259.129.116.128/269.129.119.32/279.129.144.0/219.129.176.0/229.129.212.0/239.129.235.128/2512.32.228.240/2912.43.109.216/2912.66.15.192/2913.104.29.0/2413.104.96.96/2713.104.96.128/2913.104.97.244/3013.104.98.0/2713.104.101.64/2613.104.103.64/2613.104.105.128/2613.104.108.0/2613.104.109.128/2613.104.112.64/2613.104.115.128/2613.104.119.64/2613.104.119.128/2613.104.124.0/2513.104.125.0/2613.104.180.0/2413.104.184.0/2813.104.187.128/2813.104.253.160/2813.105.26.0/2413.105.28.16/2813.105.29.0/2513.105.37.64/2613.105.37.128/2613.105.64.240/2913.105.88.0/2513.105.89.52/3013.105.102.16/2813.105.102.64/2613.105.165.128/2613.105.204.128/2513.105.220.32/2713.105.220.64/3013.105.224.16/2813.106.34.0/2313.106.38.0/2313.106.38.142/3213.106.38.148/3213.106.100.0/2313.106.158.0/2313.106.211.0/2513.107.184.40/2913.107.184.48/2913.107.184.56/3013.107.185.0/2913.107.195.60/3013.107.195.152/3013.128.144.0/2015.181.32.0/2115.181.176.0/2016.56.128.0/1817.16.216.0/2117.19.176.0/2117.23.20.0/2317.30.36.0/2217.33.161.0/2617.152.32.0/2117.152.40.0/2217.200.221.0/2417.248.207.0/2417.248.210.0/2417.250.103.0/2417.253.26.0/2317.253.50.0/2317.253.192.0/24

Organizations (prefixes here)

Cogent Communications4,576
Microsoft1,249
GTT517
Akamai341
Cloudflare250
IPXO200
Apple106
Tata Communications51
Starlink49
Amazon / AWS30
Google27
Cisco Cloud Security20
Hyonix17
Equinix10
LogicWeb9
PCCW Global, Inc8
CatoNetworks6
Bunny Communications4
Datafast (Brazil)4
OpenGeoFeedOrg-Public2
AT&T1
Zappie Host1

Geofeeds (prefixes here)

Cogent Communications · 014,576
Microsoft · 01700
Microsoft · 03527
GTT · 01517
Akamai · 02259
Cloudflare · 01234
Discovered feed 61fb872014cf7fda217
IPXO · 01200
Discovered feed 7121cc18ad54d59f199
Discovered feed 531e1d534595d48b162
Discovered feed f56f98659db50565155
Discovered feed 42d14dc73872112b137
iCloud Private Relay · 01106
Akamai · 0182
Discovered feed 6c1f211a586c547b80
Cloudflare · 0263
Discovered feed e1db44d29da91c7558
Tata Communications · 0151
SpaceX Starlink · 0149
Discovered feed a0e590ec23daec4249
SpaceX Starlink · 0249
Discovered feed b6b14f161e71d66b41
Discovered feed 73e82b9529eefcca39
Discovered feed 73d11b653655790436
Discovered feed 37a57c400a75c08034
and 222 more

Data as of 2026-11-05, from Fastah's daily geofeed crawl.

Source & attribution. Place names and coordinates are from GeoNames (CC BY 4.0). The networks listed publish the geofeeds that place their prefixes here; Fastah does not edit them. Report a wrong location →