Yeah, Deep Surplus is my go to place for bulk wiring supplies. If I need something terminated, I usually look to monoprice. Home depot is always a store of last resort for me. At least at orchard supply they'll be nice to you while you pay those prices.

It looks like a 66 block to me, which are pretty much phone only. 110 blocks are punch down blocks for network wiring, but they're a pain to deal with.