Block 21 is an sublocality in Shakti Nagar, GT Karnal Road, New Delhi, India. Shakti Nagar (0.0 Km), Kamla Nagar (1.44 Km), Roop Nagar (1.44 Km), Kalyan Vihar (1.47 Km), Malka Ganj (2.13 Km) are the nearby areas to Block 21. New Delhi are the nearby cities to Block 21.