Nairobi

Nairobi CountyKenya

With a code: #81X6G-2T63P
Said aloud: Nairobi 2T63P

What the code says

The Grid Point Code for Nairobi is #81X6G-2T63P. It names a cell 2.56 m north to south and 3.42 m east to west, centred on 1°17'00.02"S, 36°49'00.03"E, and it turns back into that cell on any phone or computer by arithmetic alone: no network, no account, no lookup table.

The point used is the one GeoNames records for Nairobi, near its centre, and Nairobi is the capital of Kenya.

Code: #81X6G-2T63P
With a check character: #81X6G-2T63P*3
Short form: 2T63P
Cell centre: -1.283340, 36.816676
Cell size: 2.56 m by 3.42 m
Region: Nairobi County
Country: Kenya
Population: 4,397,073

How to give this address

On a sign, a form or a delivery note: The whole code, #81X6G-2T63P. It needs nothing else: no city, no street, no network to read it back.
Said aloud, in Nairobi County: Nairobi 2T63P: a name both people know, then the last five characters. They give back the exact code for anywhere within 4.0 km north or south and 5.3 km east or west of Nairobi. Further away the same five name somewhere else, which is why the whole code is what goes on a sign.
Copied by hand, or read over a phone: #81X6G-2T63P*3. The character on the end catches any single mistyped symbol and any two neighbours swapped.
As a link or a square code: Open it on the map, move to the exact door, and add directions if the code needs help: "blue gate, second floor". The link and the square code carry them. Nothing is kept on this site.

From the city to the door

The first four characters name a cell about 40 km by 53.4 km here. Each one after that picks one of 25 inside the last, so the whole ten name a spot about the size of a doorway.

81X6Metropolitan area40 km by 53.4 km
81X6GDistrict8 km by 10.7 km
81X6G2Suburb1.6 km by 2.14 km
81X6G2TA few streets320 m by 427 m
81X6G2T6Building64 m by 85.5 m
81X6G2T63Entrance12.8 m by 17.1 m
81X6G2T63PDoorway2.56 m by 3.42 m

More in Kenya

City, region and population from GeoNames, under CC BY 4.0.