Prefix Information

The prefix 231 is part of area code 443 serving Baltimore, Maryland.

This exchange contains 10,000 possible phone numbers (443-231-0000 through 443-231-9999).

Browse Numbers in This Prefix

443-231-0000-0999 443-231-1000-1999 443-231-2000-2999 443-231-3000-3999 443-231-4000-4999 443-231-5000-5999 443-231-6000-6999 443-231-7000-7999 443-231-8000-8999 443-231-9000-9999

Sample Numbers

(443) 231-0000 (443) 231-1234 (443) 231-2000 (443) 231-3333 (443) 231-4444 (443) 231-5555 (443) 231-6000 (443) 231-7777 (443) 231-8888 (443) 231-9999