Prefix Information
The prefix 991 is part of area code 508 serving Worcester, Massachusetts.
This exchange contains 10,000 possible phone numbers (508-991-0000 through 508-991-9999).
Phone numbers with prefix 991 in area code 508. Location: Worcester, Massachusetts.
The prefix 991 is part of area code 508 serving Worcester, Massachusetts.
This exchange contains 10,000 possible phone numbers (508-991-0000 through 508-991-9999).