ZONE/DIRECTORY
UNITED STATE
Z0 - CT, ME, MA, NH, NJ, RI, VT
Z1 - DE, NY, PA
Z2 - MD, NC, SC, VA, WV
Z3 - AL, FL, GA, MS, TN
Z4 - IN, KY, MI, OH
Z5 - IA, MN, MT, ND, SD, WI
Z6 - IL, KS, MO, NE
Z7 - AR, LA, OK, TX
Z8 - AZ, CO, ID, NV, NM, UT, WY
Z9 - CA, OR, WA, AK
ZONE/DIRECTORY
CANADA & MEXICO
ZE - NB, NL, NS, PE
ZC - ON, PQ
ZW - AB, BC, MB, SK
ZM - MEXICO