BT_UUID_ANCS_NOTIFICATION_SOURCE_VAL

#define BT_UUID_ANCS_NOTIFICATION_SOURCE_VAL    BT_UUID_128_ENCODE(0x9fbf120d, 0x6301, 0x42d9, 0x8c58, 0x25e699a21dbd)

#include <include/bluetooth/services/ancs_client.h>

Notification Source Characteristic UUID.