Prefix Information
The prefix 840 is part of area code 808 serving Honolulu, Hawaii.
This exchange contains 10,000 possible phone numbers (808-840-0000 through 808-840-9999).
Phone numbers with prefix 840 in area code 808. Location: Honolulu, Hawaii.
The prefix 840 is part of area code 808 serving Honolulu, Hawaii.
This exchange contains 10,000 possible phone numbers (808-840-0000 through 808-840-9999).