New Area Code Implementation Plan
Oct. 7, 2007 – Permissive Dialing
Begins
The new 575 area code becomes active. During this 12-month permissive
dialing period, callers can use either the old 505 area code
or the new 575 area code when calling locations in New Mexico
that have been assigned the new area code. The PRC approved
a longer-than-usual permissive dialing period so that residents
and businesses have more time to become accustomed to the new
area code.
Oct. 5, 2008 – Recorded Announcement/Mandatory
Dialing Period
During this period, all calls into areas of the state
that have been assigned the new area code must be dialed using
575. Callers who dial the wrong area code will get a recorded
message advising him or her to redial using 575.
After Jan. 11, 2009, telephone companies will be able to assign the same seven-digit telephone numbers in both New Mexico area codes. Therefore, callers who use the wrong area code may be connected to an untended party. If the mis-dialed call is not connected to another line, the caller will hear a generic recorded message advising that “the call could not be completed as dialed.”
