After checking the internet, I found the following information regarding the ship you have the number for, it's registered to:
Laos People's Democratic Republic. RDPL stands for "République Démocratique Populaire du Laos". I found no other information on this ship, however there are some pictures of other Il-76 on Airliners.net
http://www.airliners.net/search/photo.search?cx=partner-pub-8297169501225184%3Aa05n2n-tzky&q=Il-76+RDPL&sa=Submit&search_field=datedesc&siteurl=www.airliners.net%252F&sort_order=photo_id+desc&page=1&page_limit=15&sid=daa23ae60c7f1fc60693d5c44edb4ea5
Maybe you can build a profile for the ship
Ilyshuin Il-76TD Crew 5-7 Powered by 4 Soloviev model D-30KP Turbofans
Walt