International All Sports = IAS.
B rating.
They're a solid organization. I believe Canbet is owned by them.
Last time I tried IASbet itself, it was because they offered me a bonus deal. It ended up being an unremarkable experience. It is a very International type of book with lots of cricket, soccer, rugby; they didn't even have American style odds available. As I recall I found a few plays on tennis but eventually just transferred all my funds to a different IAS book (which, at the time, was Bet Australia.)