301-307 phone numbers

Numbers 301-307-0000 to 301-307-9999 are assigned to Verizon Maryland, Inc. (rate centre WSNG238Z13, MD, NANPA abbreviation). 8 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 301-307-3xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 301-307