Examples
A great variety of numbers meet the broad definition, including:
- National identification numbers, such as:
- Social Security numbers
- Driver's license numbers
- National Insurance number
- Routing numbers, such as:
- Bank codes and sort codes, like IBAN, and the ABA Routing transit number.
- Postal codes, such as ZIP codes (These are generally numeric in the United States, but other nations often use alphanumeric systems.)
- Telephone numbers, assigned by various telephone numbering plans, such as the ITU-T E.164 and the North American Numbering Plan (NANPA).
- Numbers of train or bus routes in public transport
- Car model names from some car manufactors, such as BMW or Peugeot, are plain numbers.
- Magic numbers
These are usually assigned either in some hierarchical way, such as how telephone numbers are assigned (in NANPA) as Country Code + Area Code + Prefix + Suffix, where the first 3 are geographically based, or sequentially, as in serial numbers; these latter are thus properly ordinal numbers.
Read more about this topic: Nominal Number
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