Narrowband IoT (NB-IoT), also known as LTE Cat NB1 is a Low Power Wide Area (LPWA) Technology developed for the Internet of things. The NB-IoT specification was frozen in Release 13 of the 3GPP specification (LTE-Advanced Pro), in June 2016. Release 13 defined 14 frequency bands for NB-IoT. In, Release 14, 4 more frequency bands were added (11, 25, 31 and 70). In Release 15, 7 more bands were introduced (4, 14, 71, 72, 73, 74, 85).

NB-IoT Frequency Bands