Prefix Information
The prefix 428 is part of area code 217 serving Springfield, Illinois.
This exchange contains 10,000 possible phone numbers (217-428-0000 through 217-428-9999).
Phone numbers with prefix 428 in area code 217. Location: Springfield, Illinois.
The prefix 428 is part of area code 217 serving Springfield, Illinois.
This exchange contains 10,000 possible phone numbers (217-428-0000 through 217-428-9999).