ITS virtual host address per MANDT

Hi experts.

I am new to ITS developing and I need to determine at runtime the ITS prefix address and port (i.e. http://someaddress.domain.com:xx).

I tried to use RSBB_URL_PREFIX_GET and TH_GET_VIRT_HOST_DATA: they gave me same prefix but different ports, both pointing to MANDT 100.

Is there a way to discover what port points to MANDT 200 (i.e. mandt in which program is running)?

Thank you in advance.