Agents Insurance Marketing USA - Lists major life and health insurance companies, and annuity companies, with links and information on each company..
A.M. Best - Insurance company directory and ratings service..
American Insurance Depot - Directories of company websites and US state insurance commissioners, plus other resources for finding insurance companies that issued old policies or resolving complaints..
Insurance Information Institute - Offers mailing address, phone numbers, email and URL links to major risk and property insurance web sites. Other insurance information on the site is quite useful..
Insurance Professional - List of USA property and casualty, life and health insurance companies..