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← Area code 443

443-203 phone numbers

Numbers 443-203-0000 to 443-203-9999 are assigned to Verizon Maryland, Inc. (rate centre WEST RIVER, MD, NANPA abbreviation). 9 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 443-203