Prefix Information
The prefix 503 is part of area code 309 serving Peoria, Illinois.
This exchange contains 10,000 possible phone numbers (309-503-0000 through 309-503-9999).
Phone numbers with prefix 503 in area code 309. Location: Peoria, Illinois.
The prefix 503 is part of area code 309 serving Peoria, Illinois.
This exchange contains 10,000 possible phone numbers (309-503-0000 through 309-503-9999).