Zone Zero

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A typical rotary telephone dial used in Kakoma-participating nations. The numbers run from 0 (furthest from the finger stop) to 9 (closest), with an extra digit ~ used to dial the operator, and separate codes within the telephone number.

The Kakoma Telephone Directory Numbering Scheme (KTDNS) commonly known as Zone Zero, is a telephone numbering plan devised in the Kúúlist Bloc in the late 1950s. Originally linking the military telephone infrastructure of Helsonia with Helsonian-occupied areas following the Great Ekuosian War, the scheme was rolled out for civil use in various countries between 1957-1962.

The Kakoma system is primarily used in Northwest Ekuosia, Akulanen, and Soltenna. Until at least 2001, the telephone scheme was used signficantly for state surveillance, monitoring and espionage operations.

The standard format of telephone numbers using the scheme is as follows:

(~~ COUNTRY CODE) ~ REGION CODE ~ SERVICE CODE ~ UNIQUE NUMBER ~

Country codes

Country codes were distributed according to geographic proximity, and often cover several sovereign states.

Service codes

Code Service type
0 Unassigned numbers.
1 Domestic telephones, for personal use only.
2 Public telephones and payphones.
3 Businesses, offices and other professional use.
4 Educational institutions only.
5 Local government and public services.
6 Reserved for military use.
7 Previously used for personal pagers, since the early 2000s predominantly used for mobile phones.
8 Central government and international organisations.
9 Reserved.

Unique number

The exact numbering scheme differs between each country, but unique numbers are between 5-10 digits long and are typically divided into two segments, eg. xxxx xxxx.

See also