There are two numbers that your Clearstream account can use: a Shortcode (5-digit number) and a Longcode (local 10-digit number).
While most texting providers offer either shortcode or longcode messaging, we offer both. This ensures the highest possible delivery rate for your messages. In most cases, we recommend sending all mass texts through your shortcode.
That being said, when syncing a List from Planning Center or importing an Excel file, a few of your contacts may have Shortcode texting blocked with their wireless carrier (usually unbeknownst to them). This is why you'll likely want to create a longcode as a 'fallback number'. If you have a longcode created in your account, mobile numbers that have shortcode messaging blocked will still be able to receive your messages via your longcode. To create a longcode, just go to your Settings > Numbers > Create Longcode.