442-240 phone numbers

Numbers 442-240-0000 to 442-240-9999 are assigned to Five9, Inc. in Ramona, CA. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 442-240-3xxx, 442-240-4xxx, 442-240-5xxx, 442-240-6xxx, 442-240-7xxx, 442-240-8xxx, 442-240-9xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 442-240