IP pool by organisation

Search for "Chicago 20 megaherz,"

IP Pool	Country	State / Region	City	Coordinates	Timezone
208.6.66.0 - 208.6.66.255	United States ISP \| ORG	Illinois ISP \| ORG	Itasca ISP \| ORG	41.9887, -88.0165	America/Chicago (UTC-6) ISP \| ORG