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  2. What is a credit card security code? - AOL

    www.aol.com/finance/credit-card-security-code...

    A credit card security code is a three- or four-digit number that’s found only on a physical credit card.

  3. Short code - Wikipedia

    en.wikipedia.org/wiki/Short_code

    In Latvia short codes also have no fixed length, starting from three digits up to five. All 4 digit short codes that start with "118" or 5 digit short codes that start with "1184" are designated to information service providers.

  4. History of telephone numbers in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/History_of_telephone...

    As demand for telephones grew, more telephone numbers were required. This would often see an exchange with existing three-digit numbers open one or more new ranges with four-digit local numbers (e.g. 5000-6999), and exchanges with existing four-digit numbers open one or more new ranges with five-digit local numbers (e.g. 60000–69999).

  5. What’s a Personal Identification Number (PIN) - AOL

    www.aol.com/finance/personal-identification...

    An individual’s PIN is the four-digit code they set after opening a debit account with their bank of choice. It is used as a layer of authentication when they perform an electronic transaction ...

  6. Card security code - Wikipedia

    en.wikipedia.org/wiki/Card_security_code

    These codes are in slightly different places for different card issuers. The CSC for Visa, Mastercard, and Discover credit cards is a three-digit number on the back of the card, to the right of the signature box. The CSC for American Express is a four-digit code on the front of the card above the account number. See the figures to the right for ...

  7. List of postal codes - Wikipedia

    en.wikipedia.org/wiki/List_of_postal_codes

    A complete 13-digit code has 5-digit number representing region, sector, city, and zone; 4-digit X between 2000 and 5999; 4-digit Y between 6000 and 9999. [25] Digits of 5-digit code may represent postal region, sector, branch, section, and block respectively.

  8. Bank code - Wikipedia

    en.wikipedia.org/wiki/Bank_code

    Denmark has 4-digit bank code (called Registreringsnummer, or Reg. nr.). France has a 10 digit code, the first 5 digits contain the clearing identifier of the banking company (Code Banque), followed by the 5-digit branch code (Code Guichet). Both numbers are only used as a combined prefix for the nationwide full account number.

  9. National conventions for writing telephone numbers - Wikipedia

    en.wikipedia.org/wiki/National_conventions_for...

    098 BBBBB for a Westport number (5 digit) 0404 BBBBB for a Wicklow number (5 digit) Area codes may also be surrounded by brackets, but this practice is falling out of use, as local dialing without the area code is optional on landlines and the area code must always be dialled on mobile phones.