10-Digit Dialing Now in Effect for the 806, 940 & 915 Area Codes10-Digit Dialing Now in Effect for the 806, 940 & 915 Area Codes10-Digit Dialing means that the area code has to be including in the dialing of all local phone calls. Other area codes affected also included 575 in Eastern New MexicoRob SnyderRob Snyder