Prefix Information
The prefix 503 is part of area code 936 serving Conroe, Texas.
This exchange contains 10,000 possible phone numbers (936-503-0000 through 936-503-9999).
Phone numbers with prefix 503 in area code 936. Location: Conroe, Texas.
The prefix 503 is part of area code 936 serving Conroe, Texas.
This exchange contains 10,000 possible phone numbers (936-503-0000 through 936-503-9999).