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2. Virtual number - Wikipedia

   en.wikipedia.org/wiki/Virtual_number

   A virtual number, also known as direct inward dialing (DID) or access numbers, is a telephone number without a directly associated telephone line. Usually, these numbers are programmed to forward incoming calls to one of the pre-set telephone numbers, chosen by the client: fixed, mobile or VoIP. A virtual number can work like a gateway between ...

3. Telephone numbers in Italy - Wikipedia

   en.wikipedia.org/wiki/Telephone_numbers_in_Italy

   Italian telephone numbers are defined by an open telephone numbering plan that assigns subscriber telephone numbers of six to eleven digits. In addition, other short codes are used for special services. The plan is organized by types of services, [1] indicated by the first digit. Geographic landline numbers start with the digit 0, while mobile ...

4. Transaction authentication number - Wikipedia

   en.wikipedia.org/wiki/Transaction_authentication...

   The SMS may also include transaction data, allowing the user to verify that the transaction has not been modified in transmission to the bank. However, the security of this scheme depends on the security of the mobile phone system. In South Africa, where SMS-delivered TAN codes are common, a new attack has appeared: SIM Swap Fraud.

5. Telephone numbers in Poland - Wikipedia

   en.wikipedia.org/wiki/Telephone_numbers_in_Poland

   Telephone numbers in Poland Telephone area codes in Poland Location Country Poland Continent Europe Regulator UKE Type Closed NSN length 9 Format xx xxx xx xx (geographic) xxx xxx xxx (mobile) Access codes Country code +48 International access 00 Long-distance none The assignment of telephone numbers in Poland is controlled by the Office of Electronic Communications (Urząd Komunikacji ...

6. Telephone numbers in Argentina - Wikipedia

   en.wikipedia.org/wiki/Telephone_numbers_in_Argentina

   In Argentina, area codes are two, three, or four digits long (after the initial zero).Local customer numbers are six to eight digits long. The total number of digits is ten, for example, phone number (11) 1234-5678 for Buenos Aires is made up of a 2-digit area code number and an 8-digit subscriber's number, while (383) 123-4567 would be an example of a Catamarca number.

7. Mobile country code - Wikipedia

   en.wikipedia.org/wiki/Mobile_country_code

   Overview. The mobile country code consists of three decimal digits and the mobile network code consists of two or three decimal digits (for example: MNC of 001 is not the same as MNC of 01). The first digit of the mobile country code identifies the geographic region as follows (the digits 1 and 8 are not used): An MCC is used in combination ...