The range of area codes 600-699 is currently reserved for Baja California,Baja California Sur, Chihuahua, Durango, Sinaloa and Sonora.
Baja California
Web Site
Baja California - Code 600 - Mexico Mobile Phones and Dial Codes
Baja California - Codes 600 - Mexico Mobile Phones and Dial Codes
Baja California Mexico
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