Buses to and from Mostar

Would anybody be able to tell me where is the best site to look on for information about buses from Dubrovnik to Mostar and then from Mostar to Split?

I plan to stay in Mostar overnight and would like a bus leaving Dubrovnik in the afternoon. It would then be nice to take a bus the following afternoon from Mostar to Split - if anyone could help with this It would be much appreciated.

Also, do you know if the bus takes the coastal road or the new motorway?

Thanks for help in advance

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Dubrovnik - Mostar :

8:00AM, 1:00PM, 3:15PM, 5:15PM and 10:30PM

Mostar - Split :

6:30AM, 6:45AM, 9:00AM, 9:50AM, 11:10AM, 1:00PM, 4:45PM and 11:30PM .

I think bus takes coastal ( old ) road not motorway.

From Dubrovnik to Mostar is about 3 hours driving, and from Mostar to Split is abot 3.5 or 4 hours driving.