To reach IITM telephone extensions from outside, the caller has to dial prefix (044) 2257-xxxx, where xxxx is the PABX number
For residential PABX lines (wherever provided)
- Replace 8xxx with 9xxx
- Replace 4xxx with 6xxx
If residential line is not provided "Number Not Available" or Engaged Tone will be heard.
Board PABX No : IVRS (8000) / ASR (9000)
| NAME | ROLE | BUILDING | ROOM NO. | BUILDING NAME | OFFICE EXTN (PABX). | |
|---|---|---|---|---|---|---|
| Lift at CSE Block | CSE | Department of Computer Science and Engineering | 5349 | |||
| Lift at New Biotech Block | New BT | Department Of Biotechnology | 5141 | |||
| Lift at Raman Ramanujan Block | Raman Ramanujan Block | Raman Ramanujan Block | 9438 | |||
| Lift at Sharavati Hostel | Sharavati | Sharavati Hostels | 8815 | |||
| Lift at Sports Complex | Sports Complex | Sports Complex | 8539 | |||
| Lift Bhadra | Bhadra | Bhadra Hostels | 9183 | |||
| Lift Hospital | HSP | IITM Institute Hospital | 8341 | |||
| Lift ICSR | ICSR | Industrial Consultancy & Sponsored Research Building | 8354 | |||
| Lift Tunga | Tunga | Tunga Hostels | 9184 | |||
| Lift-1 @ NAC1 | NAC1 | New Academic Complex | 9221 | |||
| Lift-1 at Mahanadhi | Mahanadhi | Mahanadhi Hostels | 8803 | |||
| Lift-1 at Nilgiri Mess | Nilgiri Mess | Nilgiri Mess | 9457 | |||
| Lift-1 at Pamba | Pamba | Pamba Hostels | 8883 | |||
| Lift-1 at Sindhu | Sindhu | Sindhu Hostels | 8863 | |||
| Lift-1 at Tamiraparani | Tamiraparani | Tamiraparani Hostels | 8943 | |||
| Lift-1 ThyssenKrupp | ESB | Electrical Sciences Block | 5511 | |||
| Lift-2 @ NAC1 | NAC1 | New Academic Complex | 9222 | |||
| Lift-2 at Mahanadhi | Mahanadhi | Mahanadhi Hostels | 8804 | |||
| Lift-2 at Nilgiri Mess | Nilgiri Mess | Nilgiri Mess | 9458 | |||
| Lift-2 at Pamba | Pamba | Pamba Hostels | 8884 |