etsysSntpClientUServerAddr 1.3.6.1.4.1.5624.1.2.38.1.2.6.1.2

The encoded unicast IP address or hostname of a SNTP server. Unicast SNTP requests will be sent to this address. If this address is a DNS hostname, then that hostname SHOULD be resolved into an IP address each time a SNTP request is sent to it.