The six training center (ALTTC, Jabalpur, Pune, Mysore, Kalyani & Guwahati) to work Zonal Centers w.e.f 1st July 2021 with reporting directly to CGM ALTTC Ghaziabad as per the following.
| S.No | Zonal Training Center | Zone | BSNL Circle attached for BSNL trainings |
| 1 | ALTTC Ghaziabad | North | J&K, HP, UK, HR, PB, UP(E), UP(W) |
| 2 | Jabalpur | West | MP, CG, RJ, GJ |
| 3 | Guwahati | NE | All NE states |
| 4 | Pune | Central | MH, AP, TL |
| 5 | Kalyani | East | OR, WB, BR, JH |
| 6 | Mysore | South | KTK, KR, TN |
Closure of eight RTTC (Rajpura, Jaipur, Lucknow, Bhubaneswar, Chennai, Ahmedabad, Nagpur, and ARTTC Ranchi) immediately & closer of its training operations by 30.06.2021.