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(This page's most recent update is May 2026)
Get all free genealogy resources for your state, organized and ready to use — The Research Library
Old telephone directories and telephone exchange records are overlooked but powerful tools for tracking ancestors between census years, identifying residences, confirming occupations, and locating relatives and associates living nearby. These materials can help genealogists follow families as they moved, discover name and address changes, and reconstruct neighborhoods or business networks. This Quicksheet explains how to use residential and business phone books, reverse directories, and historical telephone exchange lists to uncover hidden clues about your ancestors’ lives.
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For all the previously published Quick Reference Guides, click on QuickSheets.
If you use Quicksheets often, the Quicksheet Vault puts 390+ of them in one organized place — clean, printable, and easy to reuse whenever you need them. Whether you keep digital references handy or build your own genealogy binder, the Vault makes research simpler. Learn more about the Quicksheet Vault HERE