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TrueCaller - https://www.truecaller.com
- Description: Caller ID and spam blocking service
- Category: phone-research
- Tags: caller-id, spam, blocking
- Free: true
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WhitePages Reverse Phone - https://www.whitepages.com/reverse-phone
- Description: Reverse phone number lookup
- Category: phone-research
- Tags: reverse-lookup, phone, directory
- Free: true
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Spy Dialer - https://spydialer.com
- Description: Free reverse phone lookup
- Category: phone-research
- Tags: reverse-lookup, free, phone
- Free: true
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PhoneInfoga - https://github.com/sundowndev/phoneinfoga
- Description: Advanced information gathering tool for phone numbers
- Category: phone-research
- Tags: phone, osint, information-gathering
- Free: true
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IntelX (Phone Search) – https://intelx.io
- Description: Search phone numbers across leaked, indexed and public datasets
- Category: phone-research
- Tags: osint, leaks, darknet
- Free: true
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Epieos - https://epieos.com
- Description: OSINT tool to retrieve Google account and calendar info linked to a phone number
- Category: phone-research
- Tags: osint, google-account, email-correlation
- Free: true
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Ignorant - https://github.com/megadose/ignorant
- Description: Command line tool to check if a phone number is used on sites like Snapchat and Instagram
- Category: phone-research
- Tags: osint, github, social-media-check
- Free: true