Prefix Information

The prefix 840 is part of area code 781 serving Lexington, Massachusetts.

This exchange contains 10,000 possible phone numbers (781-840-0000 through 781-840-9999).

Browse Numbers in This Prefix

781-840-0000-0999 781-840-1000-1999 781-840-2000-2999 781-840-3000-3999 781-840-4000-4999 781-840-5000-5999 781-840-6000-6999 781-840-7000-7999 781-840-8000-8999 781-840-9000-9999

Sample Numbers

(781) 840-0000 (781) 840-1234 (781) 840-2000 (781) 840-3333 (781) 840-4444 (781) 840-5555 (781) 840-6000 (781) 840-7777 (781) 840-8888 (781) 840-9999