Eight zonal's in India(Group of Regions)

India is divided into multiple zones,totally we have 8 zones across india. Each zone has its own index or zonal number

State	Zonal Number
Delhi, Haryana, Punjab, Chandigarh, Himachal Pradesh, Jammu & Kashmir	1
Uttaranchal,Uttar Pradesh	2
Rajastan, Gujarat, Daman & Diu, Dadra & Nagar Haveli	3
Maharashtra, Goa, Madhya Pradesh, Chhattisgarh	4
Andhra Pradesh, Karnataka	5
Tamilnadu,Pondicherry, Kerala, Lakshadweep, Minicoy & Admindivi Islands	6
Andaman & Nicobar Islands,  Assam, Arunachal Pradesh, Mizoram,Orissa, Meghalaya, Nagaland, Tripura, Sikkim,West Bengal	7
Jharkand,Bihar	8

Zonal codes are helpful to differentiate the regions for easy administration process.