ip.dhcp.ntp.received_servers 
ip.dhcp.ntp.received_servers 

ip.dhcp.ntp.received_servers 

Returns the list of Network Time Protocol (NTP) server IP Addresses received via DHCP.

Getvar

To return the current setting value:
! U1 getvar "ip.dhcp.ntp.received_servers"
Values
A comma-separated list of IP address. The maximum number of servers listed is three (3).
Default
""
Example
"10.4.3.24,172.30.16.52"