Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
CLIFFORD PATRICIA A
   2. Issuer Name and Ticker or Trading Symbol
DUN & BRADSTREET CORP/NW [DNB] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP Human Resources
(Last)
(First)
(Middle)
103 JFK PARKWAY		 3. Date of Earliest Transaction (Month/Day/Year)
03/08/2007
(Street)

SHORT HILLS, NJ 07078		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 03/08/2007   M   12,100 A $ 23.7188 25,900 D  
Common Stock 03/08/2007   M   2,667 A $ 36.16 28,567 D  
Common Stock 03/08/2007   S   200 D $ 88.3 28,367 D  
Common Stock 03/08/2007   S   1,100 D $ 88.28 27,267 D  
Common Stock 03/08/2007   S   1,000 D $ 88.24 26,267 D  
Common Stock 03/08/2007   S   400 D $ 88.2 25,867 D  
Common Stock 03/08/2007   S   700 D $ 88.19 25,167 D  
Common Stock 03/08/2007   S   378 D $ 88.17 24,789 D  
Common Stock 03/08/2007   S   200 D $ 88.16 24,589 D  
Common Stock 03/08/2007   S   300 D $ 88.15 24,289 D  
Common Stock 03/08/2007   S   100 D $ 88.1 24,189 D  
Common Stock 03/08/2007   S   500 D $ 88.05 23,689 D  
Common Stock 03/08/2007   S   100 D $ 88 23,589 D  
Common Stock 03/08/2007   S   300 D $ 87.98 23,289 D  
Common Stock 03/08/2007   S   300 D $ 87.94 22,989 D  
Common Stock 03/08/2007   S   100 D $ 87.93 22,889 D  
Common Stock 03/08/2007   S   500 D $ 87.91 22,389 D  
Common Stock 03/08/2007   S   100 D $ 87.9 22,289 D  
Common Stock 03/08/2007   S   100 D $ 87.89 22,189 D  
Common Stock 03/08/2007   S   100 D $ 87.87 22,089 D  
Common Stock 03/08/2007   S   600 D $ 87.8 21,489 D  
Common Stock 03/08/2007   S   1,700 D $ 87.79 19,789 D  
Common Stock 03/08/2007   S   1,600 D $ 87.78 18,189 D  
Common Stock 03/08/2007   S   1,600 D $ 87.77 16,589 D  
Common Stock               1,205.157 (1) I Held in 401(k)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option - right to buy $ 23.7188 03/08/2007   M     12,100 12/04/2003(2) 12/04/2010 Common Stock 12,100 $ 0 0 D  
Non-Qualified Stock Option - right to buy $ 36.16 03/08/2007   M     2,667 12/19/2004(2) 12/19/2011 Common Stock 2,667 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
CLIFFORD PATRICIA A
103 JFK PARKWAY
SHORT HILLS, NJ 07078		       SVP Human Resources  

Signatures

 /s/ Patricia A. Clifford   03/12/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Held in the Company's 401(k) plan as of 2/28/07.
(2) One-third of the option vested each year beginning on the date indicated.

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