Prefix Information

The prefix 603 is part of area code 443 serving Baltimore, Maryland.

This exchange contains 10,000 possible phone numbers (443-603-0000 through 443-603-9999).

Browse Numbers in This Prefix

443-603-0000-0999 443-603-1000-1999 443-603-2000-2999 443-603-3000-3999 443-603-4000-4999 443-603-5000-5999 443-603-6000-6999 443-603-7000-7999 443-603-8000-8999 443-603-9000-9999

Sample Numbers

(443) 603-0000 (443) 603-1234 (443) 603-2000 (443) 603-3333 (443) 603-4444 (443) 603-5555 (443) 603-6000 (443) 603-7777 (443) 603-8888 (443) 603-9999