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List Services


Build targeted, custom government email lists from KnowWho's database of more than 200,000 active contacts. Choose the branch of government that fits your objectives or subscribe to one of our self-service, list-building tools.

Government Email Lists

Access real-time mailing lists for contacts across Congress, the Federal Executive branch, state governments, and local government. Our flexible filtering options make it easy to build accurate lists and create powerful campaigns, and nightly updates ensure the most accurate data on the market.