AdresXTry the engine

Type a place. Get an address that checks itself.

Try the three moving parts of AdresX: a code that catches typing mistakes, a verification level that shows its evidence, and a basic phone that needs no data. Everything runs in your browser and nothing you enter is sent anywhere.

Code lab

Every 4.4 metre square gets a digits-only code. The last digit is a check digit, so a mistyped code is rejected before anyone drives to the wrong gate.

Country

Latitude

Longitude

Sample points are city centres, not building addresses.

Tap any digit to mistype it. The underlined blue digit is the check digit.

Plus Code (open standard, same square)

Neighbouring squares

Last group of digits for each square. Each is about 4.4 m wide.

Evidence ladder

A level is earned by written rules, not guessed. Change the evidence and watch which rung it reaches, and why.

How it was submitted

Coordinates captured

GPS accuracy (smaller is better)8 m

Phone reports a fake-location app

Device passes integrity checks

Device clock within 5 minutes of the server

Matches the declared locality90%

National code

Photo attached

Photo authenticity90%

Independent attestations (village head, neighbours)

Trained agent on site

Matches an authoritative record

Evidence strength0 / 100

The score summarises how strong the evidence is. The level comes from the rules above it. Weights are illustrative and not yet calibrated.

A basic phone, no data

USSD works on any GSM phone. Keypads only type digits, so codes are entered as digits and the country comes from the shortcode. Screens stay under 160 characters.

Whose phone is this? Type your choice or code

SMS inbox

Try: dial, then 2, then the registered code. Then mistype one digit. Then choose 3 on the new-user phone to start a claim.

About this playground

It runs the same rules as the AdresX core, ported to the browser and checked against the Python original on more than 20,000 generated cases.
Country grids use approximate bounding boxes. Production needs official boundaries.
Score weights are illustrative. They must be calibrated on real pilot data.
National codes such as NIPOST's postcode are not integrated yet.
Nothing here creates a real address or contacts a real phone.

For developers

Public check, no key needed: /v1/codes/encode
Service status: /v1/health
Registering, resolving and certificates need an API key. Contact AGXII for access.