/------------------------------/ / OMB APPROVAL / /------------------------------/ / OMB Number: 3235-0287 / / Expires: December 31, 2001 / / Estimated average burden / / hours per response...... 0.5 / /------------------------------/ +--------+ | FORM 4 | U.S. SECURITIES AND EXCHANGE COMMISSION +--------+ WASHINGTON, D.C. 20549 [_] Check this box if no longer subject STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP to Section 16. Form 4 or Form 5 Filed pursuant to Section 16(a) of the Securities obligations may Exchange Act of 1934, Section 17(a) of the continue. See Public Utility Holding Company Act of 1935 or Instruction 1(b). Section 30(f) of the Investment Company Act of 1940 (Print or Type Responses) -------------------------------------------------------------------------------- 1. Name and Address of Reporting Person* GILES ROBERT -------------------------------------------------------------------------------- (Last) (First) (Middle) c/o Crown Castle International Corp. 510 Bering, Suite 500 -------------------------------------------------------------------------------- (Street) Houston Texas 77057 -------------------------------------------------------------------------------- (City) (State) (Zip) 2. Issuer Name and Ticker or Trading Symbol CROWN CASTLE INTERNATIONAL CORP. (CCI) ----------------------------------- 3. I.R.S. Identification Number of Reporting Person, if an entity (voluntary) -------------- 4. Statement for Month/Year August 2001 --------------------------------------------------- 5. If Amendment, Date of Original (Month/Year) --------------------------------- 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) ___ Director X Officer ___ 10% Owner ___ Other (give title below) (specify below) President and Chief Operating Officer, Crown Castle UK Limited ---------------------------------------------------------------- 7. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person ____ Form filed by More than One Reporting Person Table I--Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

SEC 1474 (3-99) Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. * If the form is filed by more than one person, see Instruction 4(b)(v) Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. Table II--Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

Table II--Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

SEC 1474 (3-99) Explanation of Responses: /S/ ROBERT GILES 8/21/01 ------------------------------- ----------------- **Signature of Reporting Person Date ROBERT GILES ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). Note: File three copies of this Form, one of which must be manually signed. If space provided is insufficient, see Instruction 6 for procedure. Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

GILES ROBERT E 4