Reference: RadioReference Remote Render API

Examples:

Blytheville, AR Entergy Site

http://www.radioreference.com/apps/db/?action=siteInfo&siteId=13223
- note the SiteID of 13223

Plug the SiteID of 13223 in along withyour key per the instructions under the heading of
Trunked System Sites with Frequencies

All Entergy Sites

If you navigate to the Entergy system you're address bar shows:
http://www.radioreference.com/apps/db/?sid=164
- note the SID of 164

Plug the SID of 164 in along with your key per the instructions under the heading of
All Trunked System Sites