Prefix Information

The prefix 991 is part of area code 351 serving Lowell, Massachusetts.

This exchange contains 10,000 possible phone numbers (351-991-0000 through 351-991-9999).

Browse Numbers in This Prefix

351-991-0000-0999 351-991-1000-1999 351-991-2000-2999 351-991-3000-3999 351-991-4000-4999 351-991-5000-5999 351-991-6000-6999 351-991-7000-7999 351-991-8000-8999 351-991-9000-9999

Sample Numbers

(351) 991-0000 (351) 991-1234 (351) 991-2000 (351) 991-3333 (351) 991-4444 (351) 991-5555 (351) 991-6000 (351) 991-7777 (351) 991-8888 (351) 991-9999