Alternative form of prefix coding

plural of zero prefix

(UK, telephony) The digit 0 that begins all telephone numbers in the United Kingdom, which is substituted for the country code in the event of international calls.

(linguistic morphology) Synonym of zero prefix

plural of null prefix

A prefix that must be prepended to a telephone number in order to call a number outside one's own country.

plural of international call prefix

(rare) With a prefix applied.