← Area code 773
773-899 phone numbers
Numbers 773-899-0000 to 773-899-9999 are assigned to Verizon Wireless (rate centre CHICGOZN03, IL, NANPA abbreviation). 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.