As you want here I am telling Karnataka State Road Transport Corporation (KSRTC) Bus stations helpline number along with Hassan Bus station:

Sl. No. Bus Stations Tel. No.
1 Bangalore Kempegowda Bus Station 7760990562
2 Bangalore - Mysore Road Bus Station 7760990530
3 Bangalore - Shanti Nagar Bus Station 7760990531
4 Bhadravathi 7760973105
5 Chikkamagaluru 7760990419
6 Chitradurga 8194222431, 8194220201
7 Davanagere 7760973101
8 Dharmasthala 7760106655
9 Hassan 7760990520
10 Kolar 7760990611
11 Kundapur 7760973162
12 Mandya 7760973058
13 Mangalore 7760990720
14 Mercara 7760107788
15 Mysore 8212424995, 7760990821
16 Puttur 7760973152
17 Sagar 9916760327
18 Shimoga 9972288421
19 Tumkur 9741495772
20 Udupi 9663266400
21 Afzalpur 7760973268
22 Aland 7760973270
23 Basavakalyan 7760973310
24 Basavanabagewadi 7760973294
25 Bellary New bus station 7760973328
26 Bellary old bus station 7760973329
27 Bhalki 7760973311
28 Bidar 7760973308
29 Bijapur 7760973278
30 Chincholi 7760973271
31 Chitapur 7760973272
32 Devadurga 7760973303
33 Gangavati 7760973357
34 Gulbarga 7760973267
35 Hospet 7760973317
36 Humnabad 7760973309
37 Indi 7760973285
38 Jewargi 7760973269
39 Koppal 7760973345
40 Kudlagi 7760973320
41 Kushtagi 7760973346
42 Lingasugur 7760973300
43 Mantralaya 7760973307
44 Raichur 7760973299
45 Sandur 7760973323
46 Shahapur 7760973339
47 Sindagi 7760973288
48 Sindanoor 7760973301
49 Siruguppa 7760973330
50 Yadagir 7760973333
51 Bagalkote Bus Station 7760991783
52 Belgaum Central Bus Station 7760991635
53 Bhatkal 08385-226444
54 Chikkodi 08338-272143
55 Dharwad New bus station 0836-2221086
56 Gadag bus stand 7760991833
57 Hubli New bus station 7760991682
58 Hubli Old Bus Station 7760991662
59 Ilkal 08351-270261
60 Karwar 7760973437, 08382-226315
61 Kumta 7760991730
62 Sirsi New Bus Station 08384-229952
63 Sirsi old bus station 08384-226380