Does tyntec perform number lookup (or HLR check) before sending a message? If yes, do you cache the results?

Yes, tyntec determines the correct destination operator before each text message is sent, either via a number portability check in countries with number portability, or by verifying the number prefix in countries without portability. This way, tyntec ensures that the message always reaches the correct recipient. tyntec does not cache the number portability data; we always use the most recent portability information, in order to achieve maximum routing accuracy.