Yes-ish. A 10-digit local number (aka long code or 10DLC) can be a P2P (person-to-person) or A2P (application-to-person) number. A long code that is used to send mass texts must be registered as an A2P number. All Clearstream numbers are registered as A2P numbers. The only exception is if you use a toll-free number instead of a local number. Toll-free numbers are not yet included in A2P registration, but likely will be in the future.