Postal Index Number (PIN) or PIN Code is a 6 digit code of Post Office numbering used by India Post.
There are 9 PIN regions in the country. The first 8 are geographical regions and the digit 9 is reserved for the Army Postal Service. The first digit indicates one of the regions. In this case, digit "4" in 431703 indicate Western Region. States covered in Region "4" are Maharashtra, Madhya Pradesh and Chhattisgarh.
The first 2 digits together indicate the sub region or one of the postal circles. In this case, digit "43" in 431703 indicate Maharashtra Circle.
The first 3 digits together indicate a sorting / revenue district. In this case, digit "431" in 431703 indicate Aurangabad Sorting/Revenue District.
The last 3 digits refer to the delivery Post Office. In this case, digit "703" in 431703 indicate Ajegaon Delivery Post Office. Non Delivery Post Office in the same Pin Code receive mails from Delivery Post Office.
There are 10 Post offices in Pin Code 431703. Ajegaon is the Delivery Post office and the rest 9 are Non Delivery Post Offices.
The Related Head Office of this Delivery Post Office is Parbhani H.O.