(928 was only the third North American area code not using 0 or 1 as its middle digit.)
North American area code 603 is New Hampshire's sole area code.
North American area code 802 is the state of Vermont's sole telephone area code.
North American area code 541 covers the majority of Oregon, except the northwest part of the state.
North American area code 775 is a state of Nevada telephone area code.
North American area code 805 is a California telephone area code.
Several North American area codes were split to enable reuse of numbers.
North American area code 812 is the largest in area in Indiana, covering the southern third of the state.
North American area code 916 is an area code based in Sacramento, California.
North American area code 509 is the telephone area code for the eastern two-thirds of Washington.
