- REAL ESTATE PROPERTIES IN NORTHERN MAINE WELCOME! INSURANCE QUOTES NORTHERN MAINE RESIDENTS ONLY Welcome to our website, www.kieffer.net, which is our home on the information superhighway. Kieffer Insurance and Real Estate is a family owned and operated business and has been serving the needs of individuals, families and businesses since 1926. We hope that you will stop by our office located at ...www.kieffer.net