Interactive brokers 2fa authentication

Just wana to check, everytime we login to the ibsg portal there is a 2fa sms authentication coming from them, with Switzerland Country Code +41. is this their offical sms channel? after the recent ocbc sms being heck and used to steal $$, i was thinking to be careful abt it. ... . i am new to IB, and transfering $$ always carry a risk...like the $$ end up stolen.