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  2. Personal identification number - Wikipedia

    en.wikipedia.org/wiki/Personal_identification_number

    During a transaction, the customer's account number was read by the card reader. This process replaced manual entry and avoided possible key stroke errors. It allowed users to replace traditional customer verification methods such as signature verification and test questions with a secure PIN system. [15]

  3. Card security code - Wikipedia

    en.wikipedia.org/wiki/Card_security_code

    There are several types of security codes and PVV (all generated from DES key in the bank in HSM modules using PAN, expiration date and service code): . The first code, 3 numbers, called CVC1 or CVV1, is encoded on track one and two of the magnetic stripe of the card and used for card present transactions, with signature (second track also contains pin verification value, PVV, but now it is ...

  4. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.

  5. Telephone numbers in Uruguay - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Uruguay

    Original phone numbers had between 4 and 7 digits. To make a local phone call, those digits were all that were necessary. To make a call between two cities from different departments, required dialing zero, an area code, and the local number. On August 29, 2010, all phone numbers were changed 8 digits, according to the National Numbering Plan.

  6. Telephone numbers in Colombia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_colombia

    All landline subscriber numbers follow the pattern: 60B-YXX-XXXX; Where B is the dialing zone (where the number is located), Y is 2 to 8 (or 9 for pay phones), [2] [failed verification] and X is any digit.

  7. Telephone numbers in South Korea - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_South...

    Domestic long-distance call: 0NN (where NN is the carrier code) followed by the 0XX area code and XXXX YYYY number. See Domestic long-distance service code and Area code. Call to cellular : 01N XXXX YYYY (see Mobile phone number). When phone call is made between unified 010-number subscribers, leading 010 can be dropped (XXXX YYYY).

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