The mobile number prefix 0981 in the Philippines belongs to Smart Communications. This prefix is used by Smart and possibly Talk 'N Text (TNT), which is a subsidiary brand of Smart. Therefore, numbers starting with 0981 are primarily Smart network numbers

. In summary:

• 0981 is a Smart Communications prefix.
• It may also be associated with Talk 'N Text, which operates under Smart.
• This prefix is part of the Smart network's mobile number allocations in the Philippines

If you see a number starting with 0981, it is safe to assume it is a Smart network number.