You can send address queries to the

[tanaakhktnntrihmh@]

Telecom Operators (MNOs): For large-scale B2C, partnering with MNOs (Grameenphone, Robi, etc.) allows for geo-targeted SMS campaigns where the MNO delivers to their pre-consented subscriber base in specific areas. You don't get the raw list, but you get geo-targeted reach.
Local NGOs/MFIs: Partnerships for specific development projects may involve collecting consented data from beneficiaries in rural areas.
Retailer/Distributor Networks: Aggregated, anonymized sales data from specific store locations can indicate customer density, but individual contact details must be consent-driven.
II. The Conversion Process: From Address to Geo-Coordinate
This is the core of geo-mapping leads. It involves taking an address from your list and gambling data greece converting it into precise latitude and longitude coordinates.

Data Preparation and Standardization:

Clean Your Lists: Remove duplicates, correct typos, and standardize address formats. In Bangladesh, addresses can be highly varied (e.g., "Vill: Dhonia, P.O: Sherpur Sadar, Upazila: Sherpur" vs. "House 10, Road 5, Block B, Dhanmondi, Dhaka").
Identify Key Address Components: Clearly separate building number, road, block, area, city, district, and postal code. Consistency is vital for accurate geo-coding.
Geo-coding Tools and Services:

Google Maps API: The most common and robust solution. Google Maps Geocoding API, which returns latitude and longitude coordinates. This requires an API key and careful management of usage limits and costs.