773-906 phone numbers

Numbers 773-906-0000 to 773-906-9999 are assigned to Level 3 Communications, LLC (rate centre CHICGOZN11, IL, NANPA abbreviation). 6 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 773-906-0xxx, 773-906-1xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 773-906