773-820 phone numbers

Numbers 773-820-0000 to 773-820-9999 are assigned to New Cingular Wireless PCS, LLC (rate centre CHICGOZN01, IL, NANPA abbreviation). 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 773-820-4xxx, 773-820-5xxx, 773-820-6xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 773-820