DIGIPIN (Digital Postal Index Number) is India Post's new open-source geo-coded addressing system, launched in May 2025 in collaboration with IIT Hyderabad and ISRO's National Remote Sensing Centre. It divides the whole of India into a hierarchical grid — 10 levels of 4×4 subdivisions — assigning every roughly 4-metre square a unique, permanent 10-character code.
Unlike a 6-digit pincode, which covers a broad delivery area shared by thousands of addresses, a DIGIPIN identifies one specific location precisely enough to distinguish a doorway from the house next door. It's especially useful in areas without formal street addresses — villages, informal settlements, construction sites — and for emergency response, where a precise location matters more than a postal zone.
DIGIPIN does not replace your pincode. It works alongside it, as an additional, more precise layer.
The core technical idea behind DIGIPIN is recursive spatial subdivision. India's landmass is first enclosed in a bounding box, then that box is split into a 4×4 grid of 16 cells. Whichever cell contains the target coordinate becomes the first character of the code, and that cell is then itself split into another 4×4 grid for the second character, and so on for 10 levels. By the tenth level, the remaining cell is small enough — roughly 4 metres by 4 metres — to represent a single, unambiguous physical location. This is conceptually similar to systems like Geohash or Plus Codes used elsewhere in the world, but DIGIPIN is purpose-built for India's postal and emergency-response needs, uses a character set chosen to avoid visually ambiguous symbols, and is maintained as an open government standard rather than a private company's proprietary format.
Real-world use cases already emerging: logistics and e-commerce companies are exploring DIGIPIN to solve last-mile delivery failures in areas with informal or duplicate street naming — a common problem in fast-growing urban fringes and villages. Ambulance and fire services benefit from DIGIPIN's precision when every second matters and a caller may not know their exact street address, only their approximate location, which can be captured instantly via GPS and converted to a DIGIPIN. Government welfare and infrastructure schemes are also examining DIGIPIN as a way to precisely geo-tag beneficiary locations, construction sites, and rural infrastructure assets, since a DIGIPIN travels with the exact spot rather than an administrative boundary that can be redrawn.
How to generate a DIGIPIN, step by step: tap "Use my current location" above and allow browser location access — your device's GPS coordinates are read locally and immediately converted to a DIGIPIN without leaving your browser. Alternatively, if you already know a location's latitude and longitude (from Google Maps, a GPS device, or a survey record), enter them manually using "Enter coordinates manually" for the same result. Decoding works in reverse: paste any valid DIGIPIN into the decode box below to see the approximate coordinates it represents, useful for verifying a DIGIPIN you've received from someone else.
Selecting the right coordinates matters. Because DIGIPIN encodes a specific 4-metre cell, the precision of your input coordinates directly affects accuracy — a GPS reading from a modern smartphone is typically accurate enough, but coordinates read off a low-zoom map can shift the result by one or more grid cells. For critical use cases like emergency dispatch, always generate the DIGIPIN live from the actual device at the actual location rather than estimating coordinates after the fact.