Prefix Information
The prefix 311 is part of area code 442 serving Oceanside, California.
This exchange contains 10,000 possible phone numbers (442-311-0000 through 442-311-9999).
Phone numbers with prefix 311 in area code 442. Location: Oceanside, California.
The prefix 311 is part of area code 442 serving Oceanside, California.
This exchange contains 10,000 possible phone numbers (442-311-0000 through 442-311-9999).