If anyone can help, I need the radio code for my 92 integra this is what's on the bottom of the radio:

39100-sk7-a020-m1
(KEH-6261zh)

Spec No. /US
Serial No. LI 01264


The guy I bought the car from said he "thought" the code was 42451. I imput that code and all the radio did was beep and kept saying COde. Thanks you so so much for any help anyone can give.