Intenantional Standard Identifiers for Iranian
Libraries
The  National Library of Iran has become ISIL
Registration Agency for 
The Iranian
Library number consists of 12 character positions in the following order:
1-   
Country Code for 
2-   
Library Category Code for:
Academic Libraries = "2" 
Special Libraries      =
"3"
Research Libraries  = "4"
Public Libraries        =
"5"
School Libraries       =
"6"
Religious Libraries   = "7"
Children's Libraries  = "8"
3-City Code, consisting of 4
character positions
4-Library number, consisting
of 4 character positions
Examples:
IR-200060001 
IR-302310001 Branch
Office of Labour and Social Affairs of  
IR-400880006  
IR-501400001  Astan Qods Razavi
Application for assignment of
Iranian ISIL