MSISDN is a number uniquely identifying a subscription in a Global System for Mobile communications or a Universal Mobile Telecommunications System mobile network. It is the mapping of the telephone number to the subscriber identity module in a mobile or cellular phone.
| Type | datatype | |
| Is personal identifiable information (PII) ? | True | |
| Regular expression | ^[1-9][0-9]{10,14}$ | |
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| Classification | Classification | identifier |
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