does anybody know how i can find the product code of a router?
do u mean the part number of a router
if yes, then for example u can find part numbers for 2800 series router from the data sheet for any version type on:
specifically for 2821 router:
or if u have cco access to dynamic ordering tool from:
Do you mean the code you use to order the router.
If so go to the following link
From there select the router you want info on. On the next page click on data sheets and within the data sheets there are the codes for the routers and any interfaces etc. that are available for that model.