[Anveo] Out of numbers?

I'm looking to order a new number, but it seems a lot of the major area codes are simply sold out in Anveo. (For example, no numbers available in 917, 310, 714, 212, 703, 602, 818.....) I know they had offerings in some of these area codes before, so is this lack of inventory normal? Will they eventually add new numbers to these area codes? Thanks!