Numbering scheme

From Wikipedia, the free encyclopedia.

There are many different numbering schemes for assigning nominal numbers to entities. These generally require an agreed set of rules, or a central coordinator. The schemes can be considered to be examples of a primary key of a database management system table, whose table definitions require a database design.

Numbering schemes include:

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Chemistry

CAS registry numbers for chemical compounds
EC numbers for identifying enzymes
UN numbers for (classes of) hazardous substances
E numbers for food additives

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Communications

The E.164 numbering plan for telephone numbers, including:
- Country calling codes
- North American Numbering Plan
- Telephone numbering plan#Numbering plans by country
  - Argentina: Argentine telephone numbering plan
  - Australia: Australian telephone numbering plan
  - China: China telephone numbering plan
  - France: French telephone numbering plan
  - Hong Kong: Hong Kong telephone numbering plan
  - Japan: Japanese telephone numbering plan
  - Singapore: Singapore telephone numbering plan
  - United Kingdom: UK telephone numbering plan
The IP address allocation scheme (IANA)
The DNIC prefixes of X.25 NUAs assigned by the ITU http://www.itu.int/

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Locations

See also: country code, address (geography).

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Products

The UPC numbering scheme for barcodes on products
The European Article Numbering-Uniform Code Council (EAN-UCC) numbering scheme, including
- ISBN codes for books
- ISSN codes for periodicals
Vehicle identification number

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