The mobile number prefix 0911 or +63911 in the Philippines is primarily associated with Smart Communications and its subsidiary, Talk ‘N Text (TNT).
However, with the implementation of the Mobile Number Portability (MNP) law, subscribers can switch networks while retaining their original numbers. This means a number starting with the 0911 prefix, originally assigned to Smart or TNT, could now belong to a different network if the user has ported their number.
