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                                                                    EXHIBIT 23.3
 
                         INDEPENDENT AUDITORS' CONSENT
 
     We consent to the use in this Registration Statement of Corsair
Communications, Inc. on Form S-4 of our report dated January 7, 1998 relating to
Subscriber Computing, Inc. appearing in the Prospectus, which is part of this
Registration Statement. We also consent to the reference to us under the
headings "Selected Financial Data" and "Experts" in such Prospectus.
 
DELOITTE & TOUCHE LLP
 
Costa Mesa, California
May 6 1998