Central Region | Bihar and Uttar Pradesh | Bhagalpur (3201), Patna (3206), Purnea (3209), Agra (3001), Bareilly (3005), Kanpur (3009), Lucknow (3010), Meerut (3011), Prayagraj (3003), and Varanasi (3013). |
Eastern Region (ER) | Andaman & Nicobar Islands, Jharkhand, Odisha, Sikkim, and West Bengal | Kolkata (4410), Port Blair (4802), Gangtok (4001), Bhubaneswar (4604), and Ranchi (4205). |
Karnataka, Kerala Region (KKR) | Lakshadweep, Karnataka, and Kerala | Bengaluru (9001), Hubballi (9011), Kozhikode (Calicut) (9206), Thiruvananthapuram (9211), Ernakulam (9213) |
Madhya Pradesh Sub-Region (MPR) | Chhattisgarh and Madhya Pradesh | Bilaspur (6202), Raipur (6204), Bhopal (6001), Gwalior (6005), Indore (6006), and Jabalpur (6007). |
North Eastern Region (NER) | Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura | Guwahati (Dispur) (5105), Shillong (5401), and Agartala (5601) |
Northern Region (NR) | Delhi, Rajasthan, and Uttarakhand | Delhi (2201), Ajmer (2401), Bikaner (2404), Jaipur (2405), Jodhpur (2406), Udaipur (2409), Dehradun (2002), Haldwani (2003), and Roorkee (2006) |
North Western Sub-Region (NWR) | Chandigarh, Haryana, Himachal Pradesh, Jammu and Kashmir, Ladakh, and Punjab | Chandigarh/ Mohali (1601), Hamirpur (1202), Shimla (1203), Jammu (1004), Jalandhar (1402), Patiala (1403) |
Southern Region (SR) | Andhra Pradesh, Puducherry, Tamil Nadu, and Telangana | Chennai (8201), Hyderabad (8002), Kurnool (8003), Tiruchirappalli (8206), Vishakhapatnam (8007), Vijayawada (8008), and Tirunelveli (8207) |
Western Region (WR) | Dadra and Nagar Haveli, Daman and Diu, Goa, Gujarat, and Maharashtra | Panaji (7801), Ahmedabad (7001), Rajkot (7006), Amravati (7201), Mumbai (7204), Nagpur (7205), Nashik (7207), and Pune (7208). |