Northeast

CT - Connecticut
ME - Maine
MA - Massachusetts
NH - New Hampshire
NJ - New Jersey
NY - New York
PA - Pennsylvania
RI - Rhode Island
VT - Vermont

Midwest

IL - Illinois
IN - Indiana
IA - Iowa
KS - Kansas
MI - Michigan
MN - Minnesota
MO - Missouri
NE - Nebraska
ND - North Dakota
OH - Ohio
SD - South Dakota
WI - Wisconsin

South

AL - Alabama
AR - Arkansas
DE - Delaware
DC - District Of Columbia
FL - Florida
GA - Georgia
KY - Kentucky
LA - Louisiana
MD - Maryland
MS - Mississippi
NC - North Carolina
OK - Oklahoma
SC - South Carolina
TN - Tennessee
TX - Texas
VA - Virginia
WV - West Virginia

West

AK - Alaska
AZ - Arizona
CA - California
CO - Colorado
HI - Hawaii
ID - Idaho
MT - Montana
NV - Nevada
NM - New Mexico
OR - Oregon
UT - Utah
WA - Washington
WY - Wyoming

Others

AS - American Samoa
AA - Armed Forces Americas
AE - Armed Forces Europe/Canada/Middle East/Africa
AP - Armed Forces Pacific
FM - Federated States Of Micronesia
GU - Guam
MH - Marshall Islands
MP - Northern Mariana Islands
PW - Palau
PR - Puerto Rico
VI - US Virgin Islands