remote extraction of data

hi, i am building a system that requires the usage of ASN. i was wondering
if there is a tool i can use to query different databases to obtain
correspoding information from a holder of an ASN. i have been told that RTSP
can do this, but i havent found any information on it that is helpful. is
there any tool known that can help me do this. the system is to carry out
the queries every four to six hours and cache this. thanks
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