Originator (Sender ID)

The originator of an SMS is the label describing who or where an SMS is sent from. The most common originator is a mobile number (MSISDN), as this is what is displayed when an SMS is sent from a mobile handset.

The SMS originator field also has several other names.

Different types of originator are described in the following table.

Type Name	Example	Restrictions	Source TON	Source NPI
International Numeric	+447973000000	Maximum 16 digits	1	1
National Numeric	07973000000	Maximum 16 digits	0	0
Alphanumeric	CBF123	Maximum 11 characters	5	0
Shortcode	80500	Same as National Numeric	2,5 or 0	0