10DLC
Registration is part of the account, not a side project.
Every Entrance account needs a 10DLC campaign before regular sending. The form checks the website you enter and says what has to change. Status email follows that campaign as it moves through approval.
You can register more than one business. A workspace links to one campaign. The form looks at the public site, how people opt in, and whether the sample messages match the use you described. If a submission would fail review, it says so before you send it.
After approval, numbers are ordered in Manage Numbers at $1 a month. Daily throughput follows the brand trust score. A T-Mobile daily cap of 10,000 usually means you can plan around three times that across carriers.