650-309 phone numbers

Numbers 650-309-0000 to 650-309-9999 are assigned to T-Mobile USA, Inc. (rate centre HALFMOONBY, CA, 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.

Reported numbers in 650-309