Numbering scheme

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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.

[edit] Chemistry

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

[edit] Communications

The E.164 numbering plan for telephone numbers, including:
- Country calling codes
- North American 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

[edit] Locations

See also: country code, address (geography).

[edit] Products

The GS1 numbering scheme, including
- GTIN for products, which includes the UPC and EAN-13 barcodes
- ISBN codes for books
- ISSN codes for periodicals
Vehicle identification number