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Telephone Directory

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). EMAIL
Lift-2 at Sindhu Sindhu Sindhu Hostels 8864
Lift-2 at Tamiraparani Tamiraparani Tamiraparani Hostels 8944
Lift-2 Johnson ESB Electrical Sciences Block 5512
Lift-3 @ NAC1 NAC1 New Academic Complex 9223
Lift-3 ThyssenKrupp ESB Electrical Sciences Block 5513
Lift-4 @ NAC1 NAC1 New Academic Complex 9224
Lift-5 @ NAC1 NAC1 New Academic Complex 9225
Lift-6 @ NAC1 NAC1 New Academic Complex 9226
Lift-7 @ NAC1 NAC1 New Academic Complex 9227
Lift-8 @ NAC1 NAC1 New Academic Complex 9228
Ligy Philip Faculty, Civil Engineering ED 515 Department of Engineering Design 4274 ligy
Low Temparature Lab HSB 129 Department of Humanities and Social Sciences Block 5867
LPCVD Clean Room ESB 123 Electrical Sciences Block 5539
LT Lab Liquefier Room HSB 129 Department of Humanities and Social Sciences Block 5895
Lt. Gen. P. Ravi Shankar Visiting faculty, Aerospace Engineering ASE 110 Aerospace Engg. Building 4029
LTC Unit ADB 1 Central Administration Building 8240
Luoyi Tao Faculty, Aerospace Engineering ASE 112 Aerospace Engg. Building 4003 luoyitao
M.A. Final Year Lab (Multimedia Lab) HSB 351 Department of Humanities and Social Sciences Block 5504
M.Tech Admission-1 GATE 201 JEE/GATE Office 8210
M.Tech Admission-2 GATE 201 JEE/GATE Office 8211