Prefix Information

The prefix 203 is part of area code 636 serving OFallon, Missouri.

This exchange contains 10,000 possible phone numbers (636-203-0000 through 636-203-9999).

Browse Numbers in This Prefix

636-203-0000-0999 636-203-1000-1999 636-203-2000-2999 636-203-3000-3999 636-203-4000-4999 636-203-5000-5999 636-203-6000-6999 636-203-7000-7999 636-203-8000-8999 636-203-9000-9999

Sample Numbers

(636) 203-0000 (636) 203-1234 (636) 203-2000 (636) 203-3333 (636) 203-4444 (636) 203-5555 (636) 203-6000 (636) 203-7777 (636) 203-8888 (636) 203-9999