DigiPin — Digital Address Lookup for any location in India

What is DigiPin?

DigiPin is a free web tool for looking up the Digital Postal Index Number for any location — the 10-character grid code introduced by India's Department of Posts as a uniform, machine-readable addressing system. Enter coordinates, search by place name, or drop a pin on the map. Get the DigiPin in one step. Copy the URL and the same result is reproducible for anyone else, anywhere.

Live at whatismydigipin.com.

The problem

India has one of the messiest addressing systems in the world. Street names are inconsistent, landmarks change, PIN codes cover huge areas, and "opposite the blue gate next to the temple" is still a delivery instruction in 2026. The Department of Posts introduced DigiPin — a grid-based system that assigns a unique 10-character code to every 4m × 4m square on the Indian landmass — to fix exactly this.

But the official lookup sat behind a hard-to-find PDF and a clunky map UI. There was no clean way to share a DigiPin with a friend, no permalink format, no bulk lookup, no mobile-first interface. The technology existed; the usable front door didn't.

What it does

• Lookup by latitude/longitude, place name, or interactive map pin
• Shareable permalinks — the DigiPin is part of the URL, so whatismydigipin.com/PIN-CODE-HERE renders the same result
• Reverse lookup — enter a DigiPin, get the coordinates and the map location
• "Get my DigiPin" button that uses the browser's geolocation API
• Works without an account, with no login wall, no signup prompts
• Mobile-friendly, keyboard-friendly, screen-reader-friendly

How it works

DigiPin is a deterministic encoding of a latitude/longitude pair into a 10-character string built from a reduced alphabet. The algorithm divides the Indian region into a nested hierarchy of grid cells and walks down the tree until it hits a 4m × 4m cell. The resulting code is both a unique identifier and a rough description of where in the grid the location sits.

The site runs the encoding and decoding entirely in the browser. There's no backend computing your DigiPin — your coordinates never leave the tab. The map layer uses OpenStreetMap tiles; the geocoding uses a permissive public geocoder. The permalink format is just the DigiPin string in the URL path, which makes every lookup cacheable and shareable.

Who it's for

• Indian citizens receiving or sending deliveries in areas where street addressing is unreliable
• Logistics companies standardizing last-mile addresses across cities, villages, and rural routes
• Emergency services coordinating response without relying on named landmarks
• Developers building address-aware apps who want a clean reference implementation

Real scenarios

Rural delivery. A farmer in interior Assam orders a part online. Instead of describing the route through three landmarks, they share a DigiPin. The delivery partner pastes it into their app and navigates directly to the 4m square outside the gate.

Emergency response. Someone needs an ambulance on a stretch of highway with no signage. They open DigiPin, tap "Get my DigiPin", read out the 10 characters. Dispatch decodes it to exact coordinates in seconds.

Real-estate listings. A listings platform publishes property pages with DigiPins instead of vague "near X" strings. Prospective buyers click through to a map that's accurate to within a few meters.

Why I built it

Single-purpose utility sites are underrated. They have no login, no dashboard, no settings, no onboarding — they do one thing, they do it in under a second, and they're indexable by search engines because the URL carries the query.

DigiPin had a specification, a government-blessed use case, and exactly zero good consumer interfaces. Building one was a weekend. The site has shown up on the first page of Google for "digipin lookup" since the week it launched, earns nothing directly, and quietly handles a steady stream of real traffic. That's a compounding asset for the cost of a weekend.

A web app doesn't need to be an empire — it needs to load fast and answer the question.

FAQ

Is this an official India Post product? No. This is an independent front-end to the open DigiPin specification. For the official reference implementation, see India Post's own materials.

Does DigiPin work outside India? The DigiPin specification is scoped to the Indian region. Outside that grid, the algorithm returns invalid codes. If you need a global equivalent, look at what3words or plus codes.

Is my location sent to a server? No. Geocoding and encoding happen in the browser. The only network call is to fetch OpenStreetMap map tiles.

Can I bulk-convert addresses? Not yet in the UI — that's on the roadmap. The underlying encoder is deterministic and can be wrapped in a script if you need it at scale; reach out via the contact page.

Try DigiPin

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