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Exhibit 12.1. Certification pursuant to Section 302 of the 2002 Sarbanes-Oxley Act

I, Ad Scheepbouwer, certify
  that:

|1. | I have
      reviewed this annual report on Form 20-F of Koninklijke KPN N.V.;                                                                                                                                                                                                                                                    
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|2. | Based
      on my knowledge, this report does not contain any untrue statement of a
      material fact or omit to state a material fact necessary to make the statements
      made, in light of the circumstances under which such statements were made,
      not misleading with respect to the period covered by this report;
|   |                                                                                                                                                                                                                                                                                                                                   
|3. | Based
      on my knowledge, the financial statements, and other financial information
      included in this report, fairly present in all material respects the financial
      condition, results of operations and cash flows of the company as of, and
      for, the periods presented in this report;                      
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|4. | The
      companys other certifying officer(s) and I are responsible for establishing
      and maintaining disclosure controls and procedures (as defined in Exchange
      Act Rules 13a-15(e) and 15d-15(e)) for the company and have:                                                                                        
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|   | (a)                                                                                                                                                                                                                                                                                                                               
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|   | (b)                                                                                                                                                                                                                                                                                                                               
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|   | (c)                                                                                                                                                                                                                                                                                                                               
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|5. | The
      companys other certifying officer(s) and I have disclosed, based on
      our most recent evaluation of internal control over financial reporting,
      to the companys auditors and the audit committee of the companys
      board of directors (or persons performing the equivalent functions):                 
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|   | (a)                                                                                                                                                                                                                                                                                                                               
|   |                                                                                                                                                                                                                                                                                                                                   
|   | (b)                                                                                                                                                                                                                                                                                                                               

Date: March 7, 2005

/s/ Ad Scheepbouwer 
  Chairman of the Board of Management and CEO

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