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). | |
|---|---|---|---|---|---|---|
| ICP-OES Lab | SAIF | 6 | Sophisticated Analytical Instruments Facility | 5927 | ||
| ICSR Legal Cell | ICSR | 2 | Industrial Consultancy & Sponsored Research Building | 9808 | ||
| IE Lab | ESB | 4 | Electrical Sciences Block | 5429 | ||
| IIT Employees Cooperative Building Society | OAT | Near DOMS | 8399 | |||
| IIT Madras Space Lab-1 | ESB | Electrical Sciences Block | 5396 | |||
| IIT Madras Space Lab-2 | ESB | Electrical Sciences Block | 5397 | |||
| IIT Post Office | 9444 | |||||
| IITMSAT Ground Station | ESB | Electrical Sciences Block | 5394 | |||
| IITMSAT Lab | ESB | Electrical Sciences Block | 5395 | |||
| Ilaksh Adlakha | Faculty, Applied Mechanics | MSB | 222 | Mechanical Sciences Block | 4082 | ilaksh.adlakha |
| Ilayaraja E | Chief Manager (IT) | ICSR | Industrial Consultancy & Sponsored Research Building | 9794 | ||
| Image Processing Lab | ESB | 320 | Electrical Sciences Block | 5430 | ||
| Imaging Lab | ED | 317 | Department of Engineering Design | 5644 | ||
| Imaging/Characterization | MRC | Mauritus Research Council | 5571 | |||
| Impact Load Testing Lab | RML | Rocket & Missiles Lab | 5022 | |||
| IN Gate | ING | 8267 | ||||
| Indrapal Singh Aidhen | Faculty, Chemistry | CYB | 250 | Department of Chemical Engineering | 4219 | isingh |
| Indumathi M Nambi | Faculty, Civil Engineering | ED | 511 | Department of Engineering Design | 4289 | indunambi |
| Infection Biology Lab | BT | 414 | Department Of Biotechnology | 5137 | ||
| Information System Lab | CSD | 151 | Department of Electrical Engineering | 5405 |