There is API, Call Park on Party API (Beta), that helps to park a call into a standard park location:

https://developers.ringcentral.com/api-reference/Call-Control/callParkParty

It Parks a call to a virtual location from where it can further be retrieved by any user from any phone of the system. Park locations are automatically assigned by the RingCentral system and ranging 801-899 .

Thanks Anirban, I have no problem performing the park and processing the updated status to know which park location it has gone to, I just wanted to confirm if the range was always 801-899 or if it might be some other range - you have answered my question