I have lat/long and I get geocode like 34TCK9320739642 from mgrs geocode reverse in arcmap
how can convert that to address (country.city.state)
I'm afraid you would have to provide a little more information for a more detailed response. If you are familiar with Python you can use the mgrs library to convert MGRS to Decimal Degrees and then use the reverse geocode tool to get the address.
import mgrs m = mgrs.MGRS() coords = m.toLatLon("34TCK9320739642")
output would be a tuple:
you will need Python 2.7 and Microsoft Visual C++ compiler for python 2.7 for the library to work. I'm not sure what licence level you need in ArcMap to run the reverse geocoder but you will need an address locator.
This is my example of using the revese geocode tool:
The input table:
The output table: