Phone Number Lookup Services: There are online "people search engines" or "reverse phone lookup" services (some are mentioned in the search results like Truecaller, WhitePages, IPQS). Be aware that these often have limitations on free searches and might require payment for detailed information. Their accuracy can also vary.
Mobile operators in Indonesia include Telkomsel, Indosat Ooredoo macedonia whatsapp number data Hutchison (merger of Indosat and 3), XL Axiata, Smartfren, and others. Mobile numbers often have a prefix that identifies the operator ten belong to Telkomsel).
Landline numbers have area codes. For example, Jakarta's area code is often 021.
In summary, while a free, downloadable database of Indonesian mobile numbers isn't available due to privacy reasons, you might be able to find a specific number through other means if you have a legitimate need.
What is your reason for wanting to find an Indonesian mobile number directory? Knowing this might help me point you in a more useful direction.