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Classifications Hotline (CHL)

What is the Classifications Hotline?

The Classifications Hotline (CHL) serves as a central reference service for international economic and social classifications. Established in response to a request to the United Nations Statistical Commission, the Hotline provides classifications information in reply to queries from the public. It promotes common approaches, principles and conventions in the development and use of classifications.

The Hotline provides technical assistance to users of the International Standard Industrial Classification (ISIC), the Central Product Classification (CPC) and the Classifications of Expenditure according to Purpose (COFOG, COICOP, COPNI and COPP). Upon request, the Hotline disseminates publications and databases containing the above classifications and relevant tools such as correspondence tables and indexes in English, and, subject to availability, in other official UN languages. It provides assistance in the interpretation and coding of the above classifications. It refers queries about other economic and social classifications to the source or organization where such information can be obtained.

The Hotline welcomes comments, problems and requests relating to the content, structure or implementation of the above classifications, with a view to future improvement, update and revision of the classifications.

Contact Information

The Classifications Hotline can be reached by e-mail, fax or regular mail:

by e-mail:   CHL@un.org
by fax:+1 (212) 963-1374
by mail:Director
Statistics Division
Attn: Economic Statistics and Classifications Section
United Nations
New York, NY 10017