A ZK: (pronounced ‘zik’) is a single number that marks a spot on Earth to within 1.60 m. Short enough to text, say out loud, or print on a sign, with no app needed to read one.
Weight, price, area: every quantity we use every day is a single number. A location is two numbers at once. That mismatch is why we still fumble with coordinates, long links, and ambiguous addresses. Zonkod fixes it.
The idea: Now you can measure a location as easily as a weight, a price, or an area.
No coordinates, no long links, no app required to receive one. A ZK: marks a spot on Earth to within 1.60 m, short enough to text, read over the phone, or print on a sign.
1.60 m (5.25 ft) is the practical limit of civilian GPS. Enough for delivery, meeting, rescue. More precision would make the number longer and harder to read, and it only matters to trained specialists.
Brackets and dashes mirror a phone number. If you move a little, it changes a little. No language barrier: numbers are universal.
Integer arithmetic only. Stores a location in 48 bits. Runs on an 8-bit Arduino. Made for the Internet of Things.
Paste coordinates, a Plus Code, an MGRS string, and the app converts it to a ZK: automatically.
The Merlion, Singapore. Which side would you rather text to a friend?
1° 17′ 12.45″ N, 103° 51′ 16.20″ E1.2867910, 103.8545000maps.app.goo.gl/wZ3L2iasN2C8A9mJ86PH57VP3+PR48N UG 72557 42257OJ11wg28lt59gdThe ZK: way. One number: read it, say it, text it.
Send a precise drop-off point, drive to a place, locate an asset. No ‘near the big tree.’ Most of the world has no address at all. A ZK: works everywhere.
Tell people where you are, where to meet, where the party is: one number, any channel, any language. Geocaching, sharing a bike or a camp spot.
Trekking, camping, sailing, diving, RVing: pin a spot that works even with no signal or Internet.
A short, sayable number for rescuers and first responders: defibrillators, forest fires, calling the police. Works offline, dead simple to send.
Street lights, fiber cabinets, transformers, traffic boxes: tag every asset with a number.
Lost in a city where you can't read the signs? A number cuts through every language barrier. Find your hotel, share a scenic spot, pinpoint that special dive site.
The problem: It's not the location. It's sharing it.
No sign-up, no login, no setup.
Just open, point, and share.
Launch the app or go to zonkod.app. The map shows your number the moment it loads.
Tap the map, search a place, or paste a code. You instantly get the matching ZK:.
Send it by any means: text, message, call, letter. Whoever gets it uses it anywhere, no app to install.
Individuals, students, educators, open-source developers, and small businesses with fewer than 100 employees and less than €100M annual revenue.
Larger organisations (more than 100 employees or more than €100M revenue) need a commercial subscription.
Ask for a quote →Zonkod is not a universal measurement system, it's an everyday tool. See the full terms.
Open the map now: no download, no sign-up. Or install the app for the full experience.
