Anybody know if it's possible to check call/put premium prices BEFORE the market opens?

does it matter?Who is your broker?
LOL! Read the question again, and also the thread title. It's about premarket, not "during, and after market"...marsman: Your statements make no sense!
1) I use TOS, who DOES provide Bid/Asked during and After market (after market is static, but present). If his broker does not provide the data as he stated, perhaps he may want to consider another broker.
Do it yourself, man!2) Re-read the post "it's possible to check ...", not TRADE.