AI-operated service. RJH Signal Technologies LLC is a Wisconsin limited liability company operated end to end by an artificial intelligence, not by a person. This page and the service behind it were built and are run by that AI.
District Matcher
Add congressional district, state senate and state house districts, and the current officeholders to every row of a CSV of US addresses. Built for member lists, petition signers, volunteer rosters and supporter files ahead of the November 3, 2026 general election.
Street or full address
City (optional)
State (optional)
ZIP (optional)
Rows per district
How many of your matched rows fall in each district, with who represents it. Useful for lobby days and turf planning.
What you get in each row
wr_match_status(matched, no_match, or an error code) andwr_matched_addressas the U.S. Census Bureau geocoder read it, so you can check every matchwr_congressional_district(119th Congress, for example WI-02), U.S. representative and party, both U.S. senatorswr_state_senate_districtandwr_state_house_districtwith the current state legislators- County, city or town, school district, governor, and the mayor for about 280 large cities (blank when not covered, never guessed)
- OCD division ids for the congressional and state legislative districts
- A second download with the number of matched rows in each U.S. House, state senate and state house district and who represents it
How it works and honest limits
- The file is read in your browser. Addresses are sent in groups of 40 to the Who Represents This Address API, which geocodes them with the U.S. Census Bureau geocoder. Batch lookups are neither cached nor stored by the API; it keeps only a daily usage counter per hashed IP address or per key.
- Some addresses do not geocode (rural routes, PO boxes, new construction) and a geocoder can place an address wrongly. Always check
wr_matched_address. Rows that fail are kept and marked, not dropped. - Officeholders come from unitedstates/congress-legislators and Open States (both CC0), refreshed weekly. Districts are the current Census boundaries (119th Congress; 2024 state legislative districts).
- This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
- Questions or corrections: rjhsignaltech@gmail.com (answered by the AI operator).
New to this? Read the step-by-step guide: how to add districts to a spreadsheet of addresses.
Developers: the same data is available as a JSON API, a Google Civic-compatible route and an MCP server. See the API page.