**Exhibit12.1**

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

I, Ad Scheepbouwer,certify that:

1.                           I havereviewed this annual report on Form 20-F of Koninklijke KPN N.V.;

2.                           Based on my knowledge, this report does not containany untrue statement of a material fact or omit to state a material factnecessary to make the statements made, in light of the circumstances underwhich such statements were made, not misleading with respect to the periodcovered by this report;

3.                           Based on my knowledge, the financial statements, andother financial information included in this report, fairly present in allmaterial respects the financial condition, results of operations and cash flowsof the company as of, and for, the periods presented in this report;

4.                           The company’s other certifying officer(s) and I areresponsible for establishing and maintaining disclosure controls and procedures(as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal controlover financial reporting (as defined in Exchange Act Rules 13a-15(f) and15d-15(f)) for the company and have:

(a)                          Designed such disclosure controls and procedures, or caused suchdisclosure controls and procedures to be designed under our supervision, toensure that material information relating to the company, including itsconsolidated subsidiaries, is made known to us by others within those entities,particularly during the period in which this report is being prepared;

(b)                         Designed such internal control over financial reporting, or caused suchinternal control over financial reporting to be designed under our supervision,to provide reasonable assurance regarding the reliability of financialreporting and the preparation of financial statements for external purposes inaccordance with generally accepted accounting principles;

(c)                          Evaluated the effectiveness of the company’s disclosure controls andprocedures and presented in this report our conclusions about the effectivenessof the disclosure controls and procedures, as of the end of the period coveredby this report based on such evaluation; and

(d)                     Disclosed in this report any change in the company’sinternal control over financial reporting that occurred during the periodcovered by the annual report that has materially affected, or is reasonablylikely to materially affect, the company’s internal control over financialreporting; and

5.                           Thecompany’s other certifying officer(s) and I have disclosed, based on our mostrecent evaluation of internal control over financial reporting, to the company’sauditors and the audit committee of the company’s board of directors (orpersons performing the equivalent functions):

(a)                          All significant deficiencies and material weaknesses in the design oroperation of internal control over financial reporting which are reasonablylikely to adversely affect the company’s ability to record, process, summarizeand report financial information; and

(b)                         Any fraud, whether or not material, that involves management or otheremployees who have a significant role in the company’s internal control overfinancial reporting.

Date: March 1, 2007

Ad Scheepbouwer

Chairman of the Board ofManagement and Chief Executive Officer

----