Prefix Information
The prefix 121 is part of area code 631 serving Brentwood, New York.
This exchange contains 10,000 possible phone numbers (631-121-0000 through 631-121-9999).
Phone numbers with prefix 121 in area code 631. Location: Brentwood, New York.
The prefix 121 is part of area code 631 serving Brentwood, New York.
This exchange contains 10,000 possible phone numbers (631-121-0000 through 631-121-9999).