Discover a groundbreaking OSINT approach for obtaining phone numbers from email addresses in this 31-minute BSidesLV conference talk. Explore classic methodologies, attack vectors, and services used in this process. Learn about the North American Numbering Plan Administration, National Pooling Administration, and how to leverage exchanges. Delve into techniques such as USAM scraping, parsing, and bruteforcing. Gain insights on online services, including PayPal, and their role in this methodology. Address privacy concerns and understand the implications of shared data brokers. Conclude with recommendations and next steps for implementing this innovative OSINT technique.