Glossary
Sender ID
Definition
The alphanumeric or numeric string shown as the origin of an SMS, such as a brand name instead of a number.
Why it matters
Some countries permit arbitrary alphanumeric sender IDs; others require pre-registration or forbid them. This is why the same service appears as a brand name in one country and a random short number in another.
Related reading
Part of the HushSMS glossary — 18 terms defined.