Colleges and universities in New York State: http://www.nysed.gov/heds/IRPSL1.html.
Colleges and universities outside New York State: http://www.chea.org or http://www.ope.ed.gov/accreditation/. Make sure that the college is a degree-granting institution; some institutions listed on these sites are not.
Distance learning courses at institutions approved by the New York State Education Department: http://www.highered.nysed.gov/ocue/ded/home.html. Distance learning courses at institutions outside New York State: http://www.highered.nysed.gov/tcert/certificate/distance.html.