Identifying Your Version

The first 4 digits in the serial number (look on the box or the underside of the router) represent the hardware revision:

CDF0 = WRT54G v1.0
CDF1 = WRT54G v1.0
CDF2 = WRT54G v1.1
CDF3 = WRT54G v1.1
CDF5 = WRT54G v2.0
CDF7 = WRT54G v2.2
CDF8 = WRT54G v3.0
CDF9 = WRT54G v3.1
CDFA = WRT54G v4.0
CDFB = WRT54G v5.0
CDFC = WRT54G v5.1
CDFD = WRT54G v6.0
CDFE = WRT54G v7.0
CDFK = WRT54G v7.2 
CDFF = WRT54G v8.0 
CDFG = WRT54G v8.0 
CDFJ = WRT54G v8.2 

CL7A = WRT54GL v1.0
CL7B = WRT54GL v1.1
CL7C = WRT54GL v1.1

CGN0 = WRT54GS v1.0
CGN1 = WRT54GS v1.0
CGN2 = WRT54GS v1.1
CGN3 = WRT54GS v2.0
CGN4 = WRT54GS v2.1
CGN5 = WRT54GS v3.0
CGN6 = WRT54GS v4.0
CGN7 = WRT54GS v5.0
CGN8 = WRT54GS v5.1
CGN9 = WRT54GS v6.0 
CGNB = WRT54GS v7.0
CGNC = WRT54GS v7.0 
CGNE = WRT54GS v7.2 
CJK0 = WRTSL54GS v1.0

CO61= WRT54G-TM v1.1 (T-Mobile HotSpots)