Find VirtualCenter IP address through ESXi box

To check VirtualCenter IP address

Log in to the ESXi /ESX host with an SSH client as root. For more information, see Connecting to an ESX host using a SSH client (1019852).
Navigate to the /etc/opt/vmware folder by typing:

cd /etc/opt/vmware

Review the serverIP configuration section of the/etc/opt/vmware/vpxa.cfg file to see if the IP address is correct
Run the command:

cat /etc/opt/vmware/vpxa.cfg | more