This script takes an IP/prefix as input, and lists all BGP ASs and Peers to which it is currently being advertised along with any aggregate prefix:
bdale@0ffnet-srx210-gw> op show-bgp-adv-route prefix 172.16.10.4
Peer AS Peer IP Aggregate Prefix
65534 172.16.22.1 172.16.10.0/24
4294967295 172.16.23.1 172.16.10.0/24
1234567890 2402:c001:fcd1:ba20:ae43:1001:2311 172.16.0.0/16
You can test this directly from Junos providing your box can resolve DNS and reach the Internet:
op url https://raw.githubusercontent.com/dfex/DFEXjunoscripts/master/show-bgp-adv-route.slax prefix 172.16.10.1