Premium monitoring agent locations are not available by default within the Device interface. Premium Agent locations require an additional cost because of significant bandwidth costs in those geographies.
Premium Locations include:
Location                   IP
Buenos Aires, Argentina     131.255.7.26
Johannesburg, South Africa  197.221.23.194
Tokyo, Japan               110.50.243.6
Contact the Dotcom-Monitor sales department at 1-888-479-0741 x1, or sales@dcmstaging.wpengine.com for questions, or to enable the Premium Agent locations.