← Area code 484
484-691 phone numbers
Numbers 484-691-0000 to 484-691-9999 are assigned to Level 3 Communications, LLC (rate centre DOWNINGTN, PA, NANPA abbreviation). 4 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 484-691-3xxx, 484-691-4xxx, 484-691-5xxx, 484-691-6xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.