The state of New Mexico is growing! Starting October 7, 2007, New Mexico will have two area codes for the first time in state history. The new 575 area code will cover most of Southern and Eastern New Mexico, including Las Cruces. The 505 area code will continue to work until fall of 2008, however make sure to update your Las Cruces phone numbers with the new area code! For more information visit: www.nm575.info