← Area code 203
203-899 phone numbers
Numbers 203-899-0000 to 203-899-9999 are assigned to Frontier Comm of Ct in Norwalk, CT.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.
Numbers 203-899-0000 to 203-899-9999 are assigned to Frontier Comm of Ct in Norwalk, CT.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.