You may search the National Registry of appraisers at the ASC (Appraisal SubCommittee) website. The ASC provides many ways to search for appraisers: all within a state, a city, a county, by name, even by license number.
NOTE: Some licensed appraisers may not appear on the list obtainable from the above pages. Because of processing by the Federal Registry, there can be a time lag of up to 2 weeks after TALCB processes renewals or original licenses. TALCB encourages licensees to renew early in the 90 day renewal window.