IP pool by organisation

Search for "Dialpool-nas.chicago.il.ameritech.net."

IP Pool	Country	State / Region	City	Coordinates	Timezone
67.37.138.0 - 67.37.138.255	United States ISP \| ORG	Illinois ISP \| ORG	Chicago ISP \| ORG	41.8781, -87.6298	America/Chicago (UTC-5) ISP \| ORG