FCC Auction: Who's Bidding on C Block?

At the end of round 39 of the Federal Communications Commission's auction of the national C block of 700 MHz spectrum, it appears at least two entities continue to bid.

The top bid now is a bit over $4.83 billion, up from the prior high of $4.7 billion at the end of round 38. Some of us think Google has halted its bidding, and most of us think Verizon Communications intends to win the C block. So if all that is true, at least one other company continues to bid against Verizon. Curious.

It's hard to picture at&t bidding for C block spectrum, as observers have predicted it would focus on filling in holes in its 700 MHz spectrum by bidding on local chunks of the B block.