NCID may refer to:
- Network Caller ID, an open-source client/server network Caller ID package
- NCID (book identifier), an identifier for books, used by CiNii, a bibliographic database maintained by the Japanese National Institute of Informatics
- National Centre for Infectious Diseases, a quarantine and management centre for contagious diseases in Singapore
This disambiguation page lists articles associated with the title NCID.
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