pretty much everyone has at least a couple of old or throwaway numbers tho?
use one of those.
i have lik 5 numbers from 2 different countries rn
also you don’t need a phone number for a google account? (i hav like 10 accounts i switch between in addition to my primary one with all the billing info, google cloud and stuff)
“infinite ips” dont matter if they block your subnet lol
ipv6 blocking is usually done on a per subnet basis