Mandatory dialing for the New Mexico 505/575 Area Code Split

T-Mobile is reminding its customers that the 505/575 area code split relief plan approved by the New Mexico Public Regulation Commission (NMPRC) will enter its final phase on October 5, 2008, when mandatory dialing becomes effective.
Once mandatory dialing starts, callers must use the correct area code to complete their calls. A recorded announcement will be played when a caller dials the old 505 area code for a number that moved to the new 575 area code.

The recording will direct callers to hang up and redial using the new 575 area code. Additionally, some callers may hear tones before the recorded announcement which will sound similar to the tones generated by fax machines; these are TTY tones for the hearing impaired which alert their equipment to wait for the recorded announcement.

Who has the new 575 Area Code?
The NMPRC divided the state into two regions. The southern and eastern portions of the state, including Alamogordo, Carlsbad, Clovis, Deming, Hobbs, Las Cruces,
Penasco, Roswell, Raton, Silver City, and Taos, will be served by the new 575 area
code. The northwestern region of the state, including Albuquerque, Espanola,
Farmington, Gallup, Las Vegas, Santa Fe, Shiprock, and most of the Navajo Nation, will
retain the 505 area code. A listing of affected prefixes is included with this notice.

What will not change?
Local calling areas will remain the same; the price of a call, coverage area, or other rates
and services will not change. Your 7-digit telephone number will remain the same. You
can still dial just three digits to reach 911 and 411. If 211, 311, 511, 611, 711 and 811
are currently available in your community you can still dial them with just three digits.

How will the new area code impact you?
It is recommended that customers complete the following steps before October 5, 2008
to ensure successful call completion.