In your query, you have not mentioned on which subject you have completed and on which subject you want to do Ph.D. Some subjects don't have the provision of part-time Ph. D. But still as author Natrajan and Partha sir have mentioned IGNOU
. You can check that, similarly you can even check Madhurai Kamaraj University
, Annamalai University
these universities provide distance education even Ph. D programmes are also conducted along with it you can even check these universities which provide Part-Time Ph.D. Programmes in India- List of Colleges and Universities
Amity University, Bharathiar University-Coimbatore, Delhi Technological University-Delhi, IBS-Hyderabad, Jamia Millia Islamia-Delhi, Lovely Professional University-Jalandhar, Amrita University, Amrit Nagar-Coimbatore, Institute for Social and Economic Change-Bangalore, Manipal University- Manipal, SRM University-Tamil Nadu
Global Center for Clinical Research, University of Hyderabad-Hyedrabad, Andhra University College of Law
Vaishno Devi Institute of Studies-Kolkata, Invertis University-Bareilly, Wellborn Group of Professional Studies-Luchnow, Dr. B.R Ambedkar University-Agra, Teerthanker Mahaveer University-Moradabad, Mangalayatan University-Aligarh, Jaipur National University-Jaipur, VIT University- Vellore and Chennai, Mody University of Technolgy and Science-Jaipur. Above universities link I don't have. you will get on google.