CBeebies is a famous British channel for little kids launched by the BBC on 11 February, 2002 when founder Chris Jarvis "had the idea for a CBBC for younger kids" . It manages an international network supported by subscription services, and is frequently watched by families without cable TV. It airs Alphablocks.
If those who live outside the UK click on the link, the website comes up showing nothing but the Latin American CBeebies (English and Spanish). I must warn you, there is NO Alphablocks on that site's region.