Wunderite's Workers' Compensation Class Code Search, available from the Tools page or on the Workers' Comp risk data page for a commercial profile, supports 47 states and Washington D.C. We don't have class codes for Ohio, Washington (state), or Wyoming. Those are monopolistic workers’ compensation states: employers must obtain coverage directly from the state rather than the private market.
Here's the full list:
AK
AL
AR
AZ
CA
CO
CT
DC
DE
FL
GA
HI
IA
ID
IL
IN
KS
KY
LA
MA
MD
ME
MI
MN
MO
MS
MT
NC
ND
NE
NH
NJ
NM
NV
NY
OK
OR
PA
RI
SC
SD
TN
TX
UT
VA
VT
WI
WV