NPI (Number Plan Identifier)
This value is set for both the Originator and destination number in every SMS. It is used for both SMS routing and handset display purposes. The possible NPI values are listed below.| Binary Value | Decimal Value | Name |
|---|---|---|
| 0 0 0 0 | 0 | unknown |
| 0 0 0 1 | 1 | ISDN/E.164 |
| 0 0 1 0 | 2 | reserved |
| 0 0 1 1 | 3 | Data numbering plan (X.121) |
| 0 1 0 0 | 4 | Telex numbering plan |
| 0 1 0 1 | 5 | Service Center specific plan to External Short Msg Entity attach |
| 0 1 1 0 | 6 | Service Center specific plan ESME attached to SMSC |
| 0 1 1 1 | 7 | reserved |
| 1 0 0 0 | 8 | national numbering plan |
| 1 0 0 1 | 9 | private numbering plan |
| 1 0 1 0 | 10 | ERMES numbering plan |
| 1 0 1 1 | 11 | reserved |
| 1 1 0 0 | 12 | reserved |
| 1 1 0 1 | 13 | reserved |
| 1 1 1 0 | 14 | reserved |
| 1 1 1 1 | 15 | reserved |
