.:. CiaoMilano answer
Thanks for writing to CiaoMilano :-)
Strange as it may sound, Milano doesn't have any central bus station...
Buses to and from the airports start from (and arrive to) the Central railway Station, or Stazione Centrale, where no central phone number for buses is provided.
For these buses, please refer to our webpage on Airports
Tourist buses, instead, mainly start from (and arrive to) the area around the Sforza Castle, or Castello Sforzesco. The main companies operating there are Autostradale and Zani Viaggi, both with ticket offices nearby.
For the Castello, please refer to our webpage
, while the relevant websites of the bus companies follow.
Autostradale - www.autostradale.it
Zani Viaggi - www.zaniviaggi.it
International companies like Eurolines refer to a small peripheral bus terminal, close to the Lampugnano metro station. Tickets there are also sold by Autostradale, and the phone number is [+39] 02 300891.
Hope this helps...