How to extract contacts from Whois records with LetsExtract

LetsExtract Email Studio allows you to extract email addresses, phone numbers and addresses from a Whois database.

What is Whois?

Whois is a protocol that allows you to extract information about the owner of a domain. This information includes the domain owner's email address, contact phone number, address, the date when the domain was registered and the date the registration expires. The information can be stored both on a central server and directly on the server where the domain was registered.

How Whois Contact Extractor works

All you have to do is specify a list of domains to check. LetsExtract will send queries to the central server for a particular domain zone (.com, .org, .net, etc.). If there is no information on the central server, the program will address the server where the domain was registered. LetsExtract Email Studio will extract this information and display it on the "Results" tab.

Supports all domain zones
We regularly update our lists of central Whois servers

High speed
LetsExtract works in multi-threaded mode

Proxy support
LetsExtract supports HTTP proxies

Saving and Exporting
The found results can be saved in the CSV file format or can be exported to Excel

Built-in validator
The found email addresses can be validated using the built-in Email Verifier.

No limitations
We don't charge for the number of found email addresses/phone numbers

Example of use

1. Run Whois Extractor and insert a list of domains to check:



You can choose the working mode:
• Accurate Mode - slow mode. The program will work in 1 thread and with extended intervals between requests. This will help to bypass the limitations of most Whois-servers (Whois-servers monitor requests, and if this happens too often, they can temporarily ban an IP-address).
• Fast Mode - a multi-threaded mode (you can specify the number of threads and the interval between requests in the "Connection" tab of the Settings window). In this mode LetsExtract will work faster, but some information will be lost (usually around 25%) due to Whois server limitations.



2. After you click the "Start" button, LetsExtract begins its work of extracting email addresses and other information. You can track this process on the "Queue" tab and see the results on the "Results" tab:




3. Once the process is completed, you can process the list through the "Results" menu or save the results.


4. You can also launch the built-in Email Verifier to delete non-existent or invalid email addresses. You can also start an email distribution right from the program thanks to the built-in Email Sender.

Note: By default, LetsExtract only extracts email addresses. To enable phone number extraction click the "Phone & IM Settings" tab in the program's "Settings" window.