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)
The full format of the email is [Email]@iitm.ac.in
List of Intercom Extensions
| NAME | ROLE | BUILDING | ROOM NO. | BUILDING NAME | OFFICE EXTN (PABX). | |
|---|---|---|---|---|---|---|
| Office | Taramani Guest House | Taramani Guest House | 8451 | |||
| Office | Taramani Guest House | Taramani Guest House | 8452 | |||
| Office | Tunga | Tunga Hostels | 8710 | |||
| Office | NCCRD | National Centre for Combustion Research and Development | 9860 | |||
| Office 2 | ED | Department of Engineering Design | 5636 | |||
| Office Assistant-1 | ICSR | 2 | Industrial Consultancy & Sponsored Research Building | 8358 | ||
| Office Assistant-2 | ICSR | 2 | Industrial Consultancy & Sponsored Research Building | 8386 | ||
| Office DST Unit of Nano Science | HSB | 148 | Department of Humanities and Social Sciences Block | 5929 | ||
| Office GATE | GATE | 202 | JEE/GATE Office | 8200 | gate | |
| Office Gymkhana | Sports Complex | Sports Complex | 8520 | |||
| Office Internal Audit | ADB | 1 | Central Administration Building | 8250 | audit | |
| Office Internal Audit | ADB | 1 | Central Administration Building | 8253 | ||
| Office JEE Advanced / HSEE | JEE | 201 | JEE/GATE Office | 8220 | jeeadv | |
| Office of Departmental Staff | BT | 12 | Department Of Biotechnology | 5134 | ||
| Office of International Relations | ICSR | 204 | Industrial Consultancy & Sponsored Research Building | 4927 | oir | |
| Office of International Relations | ICSR | 204 | Industrial Consultancy & Sponsored Research Building | 4928 | oir | |
| Office Room | New BT | 413 | Department Of Biotechnology | 8820 | ||
| Office Ru-TAG | ICSR | 2 | Industrial Consultancy & Sponsored Research Building | 8380 | ||
| Office SAIF | SAIF | 13 | Sophisticated Analytical Instruments Facility | 4935 | saif | |
| Office Section-1 | ICSR | Industrial Consultancy & Sponsored Research Building | 9781 |