FYI, the first 64bits of an IPv6 address identifies your network, you should really black out the values after the first 3 colons. You have the first 80 bits, while not enough to ping your network, it's enough to send packets to your network.
You'll notice it starts with 2601:8:, which is shorthand for 2601:0008:. What you want to block out is Keep:Keep:Keep:block:block:block:block:block. This will be the first 48bits, which is probably just your ISP. If you asked your ISP for a larger block, and gave you a /48, then this could be your network, but most ISPs are probably going to only hand out /64, /60, /56, but I've heard of some handing out /48s on request, no questions asked.