Wenhao Yang

Connecticut state employee payroll (29.9M rows, 2015-today) and open pension (8.15M rows, 2014-today) as public open data: agency, department, job, union, hire and termination dates, overtime and gross pay; plus tier, retirement type and pension wage. Filter by name, agency, union, year or amount.

Connecticut UCC financing-statement index (public open data, 846k debtor records): the public record of secured claims on a business or person - both debtor and secured party with names and addresses, the filing type, the lien class (OFS / MUNICIPAL / IRS / LABOR) and the acceptance and lapse dates.

Connecticut's underground storage tank register (public open data): 49.4K tank records across 12,752 facilities, with the named responsible parties, inspection findings and violation text, and DEEP enforcement actions (field NOV, warning letter, red tag, consent order) linked on one facility id.

Washington DC building permits (public open data, year layers 2009-2026): type/subtype/category, status, work description, applicant and owner, fees, address with ward/ANC/SMD, zoning and the SSL parcel key that joins to DC property records.

Washington DC's business registry (public open data): 504K corporate registrations, 62K trade names and 491K beneficial owners, linked by file number so entity -> owners -> DBAs resolves on one id. Includes registered-agent details and the beneficial ownership layer DC publishes.

Washington DC DDOT right-of-way permits (public open data): 543k construction permits and 983k occupancy permits, 2005-present. Fees broken out by kind, three named parties, ward/ANC/SMD/ZIP, district overlays and pre-computed cycle times. Search by address, owner, permittee, ward or status.

Every payment Delaware's state government made (public open data, 13.5M payment lines, FY2018-today): paying department and division, vendor, expenditure category, fund type, check number and date, and amount. Filter by vendor, department, category, fund or date.

Delaware professional and occupational licences (public data, 353,905 licences across 38 professions) plus the state's disciplinary actions against licensees (8,483 sanctions) - searchable by name, profession, licence type, status or action taken.

East Baton Rouge Parish building permits (143,986, 2011 to today): type, residential or commercial, declared project value and fee, square footage, address, and the named contractor plus owner and applicant.

East Baton Rouge Parish's business registry (80,559 businesses): trade and legal name, Open/Closed with dates, ownership type, licensed account type, the NAICS industry code with category and group, and mailing and physical addresses. Good for lead lists and industry sizing.

East Baton Rouge Parish purchase orders and contracts (~92,200 documents, $3.4bn): who won what, from which department, for how much, plus each vendor's diversity classification and the line items behind any document.

US truck & bus carrier records (FMCSA open data, 4.5M carriers): registry details, inspection history, violations, SMS BASIC safety categories, operating authority, out-of-service orders and revocations - all keyed to the DOT number. Filter by DOT/MC, state or fleet size.

Iowa's active business-entity register (public open data, 344,639 entities): legal name, type, effective date, registered agent and principal office - each with a full address and latitude/longitude. Filter by name, type, city, state or date.

Illinois IDFPR's full professional licence register (public open data, 4.2M rows, 63 boards): licensee name, business, status and dates, plus the disciplinary case, action and written reason behind 103K disciplined licences.

Every Illinois real-estate transfer declaration filed with the State (public open data, 2.93M deeds, 2014-today): address, parcel index number, instrument type, consideration paid, transfer tax split State vs. county, and the named buyer and seller. Filter by county, buyer, seller, parcel or amount.

LA County assessor parcel roll (public data, 2.43M parcels): AIN/APN, situs address, use class & code, year built, units, square footage, and the full assessment roll values with exemptions for every parcel.

Every parking citation Los Angeles has issued (public open data, 25.8M tickets): violation code and description, fine, exact location with coordinates, issuing agency, and the vehicle as recorded (plate state, expiry, make, colour, body style). Filter by code, agency, location or date.

Baltimore City environmental-code violation citations (~150.8k, open data): nuisance/trash/tobacco citations by the Environmental Control Board against a property. Citation number, address, status (Open/Paid/Abated/Voided), fine & balance, hearing, district. Property code-enforcement diligence.

Baltimore County, MD building & trade permit registers (~310k, public open data): who pulled a permit for what and where. Building/construction (~165k, est. cost + depth), electrical (~64k), gas (~42k), plumbing (~39k). Search by permit number, owner, address, status, date; aggregate by type/status.

Baltimore City building & housing permits (~292k, 2019-present, open data): full permit file - scope-of-work, cost, existing/proposed land use, address, neighborhood, district, housing typology, original vs modification. Search by case/keyword/address/cost/date; aggregate by neighborhood/use.

Baltimore City building permits (public data, 292,819 permits) and real-property records (238,148 parcels) in one actor, linked by block/lot: who pulled a permit for what and where, plus owner, sale price, year built, assessed values and zoning for the parcel.

Prince George's County, MD tax-sale foreclosure register (~78.7k, 2009-present, open data): every property submitted for county tax sale - tax account, property id, submission date, address, occupied flag. Distressed-property diligence: an address's full history or a fresh-submission sweep.

Prince George's County, MD permit register (~461k, 2013-present, open data): largest county permit record in Maryland. Building/health/site-road permits by DPIE agency, address, city, type, year, cost. Case number, project name, issue date, cost where recorded. Historical archive - dense 2013-2023.

All 2.44M Maryland real-property assessment accounts (public open data, 24 jurisdictions): assessment values, land/improvement split, CAMA structure (year built, sq ft, units, grade, type), last recorded sale with seller name, exemptions, homestead. Search by county, city, ZIP, address or sale date.