In 5G NR, the NCI is a 36-bit identity to identify a 5G gNB and its local cell id.

The NR gNB id can be from 22-32 bits in length.
Corresponding Local cell id would be 14 to 4 bits.
So the full NCI (gNB+CI is 36 bits from 0 to 68719476735)
The max gNB Id with 32 bits will be from 0 to 4294967295
The max CellId with 14 bits will be from 0 to 16383