These databases vary in the amount of information available. You can usually check on the availability of business names, look for addresses and owners. Some databases will also list the registered agent.
MASSACHUSETTS
Corporations https://corp.sec.state.ma.us/corpweb/CorpSearch/CorpSearch.aspx
Corporation Card File Search (Historical) https://corp.sec.state.ma.us/CorpWeb/CardSearch/CardSearch.aspx
UCC https://corp.sec.state.ma.us/corpweb/UCCSearch/UCCSearch.aspx
OTHER STATES
ALABAMA
Corporations https://www.sos.alabama.gov/government-records/business-entity-records
UCC https://www.sos.alabama.gov/government-records/ucc-records
ALASKA
Corporations https://www.commerce.alaska.gov/cbp/main/search/entities
UCC http://dnr.alaska.gov/ssd/recoff/ucc/search
ARIZONA
Corporations https://ecorp.azcc.gov/EntitySearch/Index
UCC https://apps.azsos.gov/apps/ucc/search/
ARKANSAS
Corporations https://directory.arkansas.gov/agency/secretary-of-state/service/corporation-entity-search/
UCC https://www.ark.org/sos/ucc/index.php (fee for online search)
CALIFORNIA
Corporations https://www.sos.ca.gov/business-programs/business-entities/cbs-search-tips
UCC https://bizfileonline.sos.ca.gov/search/ucc
COLORADO
Corporations https://www.sos.state.co.us/biz/BusinessEntityCriteriaExt.do
UCC https://www.sos.state.co.us/ucc/pages/home.xhtml
CONNECTICUT
Corporations https://startabusiness.org/ct/business-search/
UCC https://www.concord-sots.ct.gov/CONCORD/online?sn=PublicInquiry&eid=9755
DELAWARE
Corporations https://icis.corp.delaware.gov/ecorp/entitysearch/namesearch.aspx
UCC http://www.state.de.us/corp/uccsearch.shtml (must use “Delaware Authorized Searcher”)
DISTRICT OF COLUMBIA
Corporations https://business.dc.gov/research_business_info (must set up account)
UCC https://www.secstates.com/DC_UCC_District_of_Columbia_Universal_Commercial_Code_Search
FLORIDA
Corporations https://dos.myflorida.com/sunbiz/search/
UCC https://www.floridaucc.com/uccweb/search.aspx
GEORGIA
Corporations https://ecorp.sos.ga.gov/BusinessSearch
UCC https://search.gsccca.org/UCC_Search/
HAWAII
Corporations https://portal.ehawaii.gov/home/online-services/business-search/ (many documents require payment)
UCC https://bocdataext.hi.wcicloud.com/login.aspx?ReturnUrl=%2f (requires an account and payment for documents)
IDAHO
Corporations https://sosbiz.idaho.gov/search/business
UCC https://sosbiz.idaho.gov/search/ucc
ILLINOIS
Corporations https://apps.ilsos.gov/corporatellc/
UCC http://www.ilsos.gov/uccsearch/
INDIANA
Corporations https://bsd.sos.in.gov/publicbusinesssearch
UCC https://inbiz.in.gov/business-filings/ucc
IOWA
Corporations https://sos.iowa.gov/search/business/search.aspx
UCC https://sos.iowa.gov/Search/UCCsearch.html?ucc
KANSAS
Corporations https://www.kansas.gov/bess/flow/main
UCC https://mykansas.ks.gov/ucc/?p=fsrc_menu (fee service)
KENTUCKY
Corporations http://web.sos.ky.gov/ftsearch/
UCC https://www.sos.ky.gov/bus/UCC/Pages/Online-Services.aspx
LOUISIANA
Corporations https://coraweb.sos.la.gov/commercialsearch/commercialsearch.aspx
UCChttps://www.sos.la.gov/BusinessServices/UniformCommercialCode/HowToSearchForFinancingStatements/Pages/default.aspx (need account)
MAINE
Corporations https://secretaryofstates.com/maine/
UCC https://www1.maine.gov/cgi-bin/online/ucc/index.pl (fee service)
MARYLAND
Corporations https://egov.maryland.gov/BusinessExpress/EntitySearch
UCC https://egov.maryland.gov/SDAT/UCCFiling/UCCMainPage.aspx
MICHIGAN
Corporations https://cofs.lara.state.mi.us/SearchApi/Search/Search
UCC https://www.michigan.gov/sos/0,4670,7-127-5647_12539_71079-88191--,00.html (some searches are not free)
MINNESOTA
Corporations https://mblsportal.sos.state.mn.us/Business/Search
UCC https://mblsportal.sos.state.mn.us/Secured/SearchUCC (most searches are not free)
MISSISSIPPI
Corporations https://corp.sos.ms.gov/corp/portal/c/page/corpbusinessidsearch/portal.aspx (need account)
UCC https://www.sos.ms.gov/BusinessServices/Pages/UCC-Search.aspx
MISSOURI
Corporations https://bsd.sos.mo.gov/search
UCC https://bsd.sos.mo.gov/ucc-search
MONTANA
Corporations https://biz.sosmt.gov/search/business
UCC https://biz.sosmt.gov/search/ucc
NEBRASKA
Corporations https://www.nebraska.gov/sos/corp/corpsearch.cgi?nav=search
UCC https://sos.nebraska.gov/business-services/uccefs-search-and-filing-center (fee service)
NEVADA
Corporations https://esos.nv.gov/EntitySearch/OnlineEntitySearch
UCC https://esos.nv.gov/HelpFiles/UCC11-InformationRequestSearchCo.html
NEW HAMPSHIRE
Corporations https://quickstart.sos.nh.gov/online/BusinessInquire
UCC https://sos.nh.gov/corporation-ucc-securities/ucc/forms-and-search-requests/ (fee service)
NEW JERSEY
Corporations https://www.njportal.com/DOR/BusinessNameSearch/ (Only a business name search, fee for more information)
UCC https://www.njportal.com/ucc/ (fee service)
NEW MEXICO
Corporations https://portal.sos.state.nm.us/BFS/online/corporationbusinesssearch
UCC https://portal.sos.state.nm.us/BFS/online/UCCSearch
NEW YORK
Corporations https://appext20.dos.ny.gov/corp_public/corpsearch.entity_search_entry
UCC https://appext20.dos.ny.gov/pls/ucc_public/ucc_app.web_search.main_frame
NORTH CAROLINA
Corporations https://www.sosnc.gov/online_services/search/by_title/_Business_Registration
UCC https://www.sosnc.gov/online_services/search/by_title/_uniform_commercial_code
NORTH DAKOTA
Corporations https://firststop.sos.nd.gov/search/business
UCC https://apps.nd.gov/sc/busnsrch/busnSearch.htm
OHIO
Corporations https://businesssearch.ohiosos.gov/
UCC https://ucc.ohiosos.gov/search
OKLAHOMA
Corporations https://www.sos.ok.gov/corp/corpInquiryFind.aspx
UCC https://www.oklahomacounty.org/Elected-Offices/County-Clerk
OREGON
Corporations https://sos.oregon.gov/business/pages/find.aspx
UCC https://secure.sos.state.or.us/ucc/searchHome.action
PENNSYLVANIA
Corporations https://www.corporations.pa.gov/search/corpsearch
UCC https://www.corporations.pa.gov/search/uccsearch
RHODE ISLAND
Corporations https://business.sos.ri.gov/CorpWeb/CorpSearch/CorpSearch.aspx
UCC https://business.sos.ri.gov/CorpWeb/UccSearch/UccSearch.aspx
SOUTH CAROLINA
Corporations https://businessfilings.sc.gov/BusinessFiling/Entity/Search
UCC https://ucconline.sc.gov/UCCFiling/UCCMainPage.aspx (fee service)
SOUTH DAKOTA
Corporations https://sosenterprise.sd.gov/BusinessServices/Business/FilingSearch.aspx
UCC https://sdsos.gov/Business-Services/uniform-commercial-code/uccdefault.aspx (requires payment)
TENNESSEE
Corporations https://tnbear.tn.gov/Ecommerce/FilingSearch.aspx
UCC https://tnbear.tn.gov/UCC/Ecommerce/UCCSearch.aspx
TEXAS
Corporations https://mycpa.cpa.state.tx.us/coa/
UCC https://direct.sos.state.tx.us/acct/acct-login.asp (fee service)
UTAH
Corporations https://secure.utah.gov/bes/
UCC https://ucc.utah.gov/(fee service)
VERMONT
Corporations https://search-sos.org/vermont-vt-business-entity-corporation-search/
UCC https://sos.vermont.gov/corporations/ucc-lien-services/#search
VIRGINIA
Corporations https://cis.scc.virginia.gov/
UCC https://cis.scc.virginia.gov/
WASHINGTON
Corporations https://ccfs.sos.wa.gov/#/
UCC https://fortress.wa.gov/dol/ucc/search.aspx
WEST VIRGINIA
Corporations https://apps.wv.gov/SOS/BusinessEntitySearch/
UCC https://apps.wv.gov/SOS/UCC/Search
WISCONSIN
Corporations https://www.wdfi.org/apps/corpsearch/search.aspx
UCC https://dccs.wdfi.org/ (fee service)
WYOMING
Corporations https://wyobiz.wyo.gov/Business/FilingSearch.aspx
UCC https://ucc.wyo.gov/Account/Login.aspx (need account)
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