COREINFO.exe (Sysinternals)

Show the mapping between logical processors and the physical processor, NUMA node, and socket on which they reside.

Syntax
      coreinfo [-c][-f][-g][-l][-n][-s][-m][-v] -c

Key:

   -c   Dump information on cores.
   -f   Dump core feature information.
   -g   Dump information on groups.
   -l   Dump information on caches.
   -n   Dump information on NUMA nodes.
   -s   Dump information on sockets.
   -m   Dump NUMA access cost.
   -v   Dump only virtualization-related features including support
        for second level address translation.
        (requires administrative rights on Intel systems).  

All options except -v are selected by default.

Examples

Drop all the coreinfo data into a text file:

coreinfo.exe > coreinfo.txt

“Sing then the core of dark and absolute oblivion where the soul at last is lost in utter peace” ~ D.H. Lawrence

Related commands

PsInfo - List information about a system.
wmic cpu get NumberOfCores.