I have been looking for the one Nan put here and it looks to me like the ASPCA one has combined with the National one. Phone numbers are different and cost has been different in several I found, but they all seem to lead to the ASPCA. One said $25, one said $30, one said $45 and one says $55. Nan's says billed to phone, the others say billed to credit cards. I remember that I paid $45 billed to my phone, I think, but that was at least 15 years ago.
Also it looks like Canada is included in the service.
Someone else needs to look for poison control centers online and see if I am correct or if we need both numbers. They all do lead to Univ of Illinois.
BTW, a non emergency question telephone call costs $20 according to one place I read. Dang, that's awful. Maybe they mean vet info calls that are non-emergency.
Annie