As you want to know the list of coaching institutes of Delhi for IAS preparation, so here is the list of that:

List of coaching institutes:

(1). Ujjwal IAS Academy
Address: Head Office: B-18, Top floor. Satija house
City: Mukherjee Nagar
State: Delhi-110009
Phone No: +91-9213389333, +91-9868088370

(2). IMS (Institute of Mathematical Sciences)
Head Office:105--106,Top 2nd floor, Mukherjee Tower,Dr.Mukherjee Nagar,North Delhi,New Delhi-9.Branch office:87,1st Floor,Old Rajendra Nagar,New Delhi-60. Contact Person: A.Sunitha, Phone: 09999329111 ,09999197625
E-Mail: ims4ims@yahoo.in

(3). LORD KRISHNA IAS ACADEMY
Address: J-11/49, first floor, Rajouri Garden, New Delhi-27.
State: New Delhi-110009
Phone: 09873694016, 09350194016, 09873694016.
Email: lkias.academy1@gmail.com

(4). CLASSIC IAS ACADEMY
Address: UG 33-34, ANSAL CHAMBER-I, BHIKAJI CAMA PLACE,
State: New Delhi - 110066
Phone: 32323293, 32323294, 9310034050, 9310034060

(5). Khan Study Group*****
Address: 2521, Hudson Line,
Vijay Nagar Chowk,
Near Kingsway Camp Metro Station
Phone: 011-27130786, 011-27132786, 27131786
Phones: 011-45170303, 011-45170303, 47640303
City: Delhi
State: Delhi-110009