Skip to main content
WorldIP.io
City

Boulder

Colorado United States America/Denver
IPv4 addresses
437,782
Ranges
50
Time zone
America/Denver

Other cities in Colorado

Click any dot to switch cities. Size and color scale with IPv4 allocation; the current city is marked in cyan.

Top ranges in Boulder

CIDRIPsOrganizationASN
161.98.0.0/17 32.8K University Corporation for Atmospheric Research AS14041
166.2.128.0/18 16.4K — AS4155
132.163.192.0/18 16.4K National Oceanic and Atmospheric Administration AS2648
128.117.128.0/18 16.4K University Corporation for Atmospheric Research AS194
140.172.128.0/18 16.4K National Oceanic and Atmospheric Administration AS3477
128.117.64.0/18 16.4K University Corporation for Atmospheric Research AS194
161.98.0.0/18 16.4K University Corporation for Atmospheric Research AS14041
140.172.224.0/19 8.2K National Oceanic and Atmospheric Administration AS3477
128.117.0.0/19 8.2K University Corporation for Atmospheric Research AS194
128.138.64.0/19 8.2K University of Colorado at Boulder AS104
128.117.192.0/19 8.2K University Corporation for Atmospheric Research AS194
128.138.0.0/19 8.2K University of Colorado at Boulder AS104
140.172.0.0/19 8.2K National Oceanic and Atmospheric Administration AS3477
128.138.32.0/19 8.2K University of Colorado at Boulder AS104
128.117.96.0/19 8.2K University Corporation for Atmospheric Research AS194
166.2.128.0/19 8.2K — AS4155
132.163.160.0/19 8.2K National Oceanic and Atmospheric Administration AS2648
140.172.48.0/20 4.1K National Oceanic and Atmospheric Administration AS3477
128.117.32.0/20 4.1K University Corporation for Atmospheric Research AS194
132.163.144.0/20 4.1K National Oceanic and Atmospheric Administration AS2648
76.155.96.0/20 4.1K Comcast Cable Communications, LLC AS7922
132.163.128.0/20 4.1K National Oceanic and Atmospheric Administration AS2648
140.172.32.0/20 4.1K National Oceanic and Atmospheric Administration AS3477
166.2.176.0/20 4.1K — AS4155
128.117.80.0/20 4.1K University Corporation for Atmospheric Research AS194
98.53.208.0/20 4.1K Comcast Cable Communications, LLC AS7922
128.117.64.0/20 4.1K University Corporation for Atmospheric Research AS194
67.41.192.0/20 4.1K — AS209
128.138.176.0/20 4.1K University of Colorado at Boulder AS104
71.229.224.0/20 4.1K Comcast Cable Communications, LLC AS7922
63.227.32.0/20 4.1K CenturyLink Communications, LLC AS209
128.138.48.0/20 4.1K University of Colorado at Boulder AS104
174.234.48.0/20 4.1K — AS6167
192.174.32.0/20 4.1K — AS16411
198.11.16.0/20 4.1K — AS104
205.240.0.0/20 4.1K Computer Systems Design Company AS3364
207.106.16.0/20 4.1K — —
137.75.192.0/20 4.1K National Oceanic and Atmospheric Administration AS2648
128.138.160.0/20 4.1K University of Colorado at Boulder AS104
216.160.128.0/20 4.1K — AS209
128.138.128.0/20 4.1K University of Colorado at Boulder AS104
128.117.240.0/20 4.1K University Corporation for Atmospheric Research AS194
128.117.48.0/20 4.1K University Corporation for Atmospheric Research AS194
72.28.112.0/20 4.1K Telx AS36086
67.41.208.0/20 4.1K — AS209
128.138.32.0/20 4.1K University of Colorado at Boulder AS104
76.120.32.0/20 4.1K Comcast Cable Communications, LLC AS7922
174.29.80.0/20 4.1K CenturyLink Communications, LLC AS209
166.2.160.0/20 4.1K — AS4155
128.138.64.0/20 4.1K University of Colorado at Boulder AS104
Share