The southern and eastern parts of New Mexico have a new area code. 575 went into effect on Monday, October 7, 2007. We have a year to get our letterhead, business cards and advertising changed. Mandatory use of the new 575 area code begins October 5, 2008. If a number is incorrectly dialed at that point a recording will notify callers of the new area code. In January 2009 the call will no longer be completed. Every one with a business phone system will need to get busy making sure their phone systems will convert, cell phone users will need to reprogram their cell phones to dial the area codes for all local numbers. Equipment such as automatic dialers, fax machines, life safety systems, alarm and security systems, security gates, voice-mail, call forwarding settings or computer modems will have to be reprogrammed.