Territory
Southern California
Zip Codes 90000-93931
Defined by San Diego for the southern border through San Luis Obispo for the northern border. The California state lines define the eastern and western borders.
Baja Norte, Mexico
Postal Codes 21xxx - 22xxx
North region of Mexico adjacent to the southern border of California
Arizona
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New Mexico
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Nevada
Zip Codes 89002 - 89193
Southern Nevada and Clark County