How to check CMM level of an IT company. Is there any website to check the CMMI level of an IT company?

Software Engineering Institute at Carnegie Mellon University publishes appraisal results regularly.
To view the list go to below link where it provides all the CMM companies in the world.
http://sas.sei.cmu.edu/pars/pars.aspx

To download it in excel

http://www.mediafire.com/file/kiuk75sm13k3jq5/CMM.xlsx