Exhibit 1

JOINT FILING AGREEMENT

     In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with all other Reporting Persons (as such term is defined in the Schedule 13D referred to below) on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the common stock, par value $1.00 per share, of R.H. Donnelley Corporation, a Delaware corporation, and that this Agreement may be included as an Exhibit to such joint filing. This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

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SIGNATURE

     IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as of the 10th day of February, 2006.

TCG HOLDINGS, L.L.C.
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director
TC GROUP, L.L.C.
	By:	TCG Holdings, L.L.C.
		its Managing Member
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director
TC GROUP III, L.L.C.
	By:	TC Group, L.L.C.
		its Managing Member
	By:	TCG Holdings, L.L.C.
		its Managing Member
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director
TC GROUP III, L.P.
	By:	TC Group III, L.L.C.
		its General Partner
	By:	TC Group, L.L.C.
		its Managing Member
	By:	TCG Holdings, L.L.C.
		its Managing Member
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director

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TCG HIGH YIELD HOLDINGS, L.L.C.
	By:	TC Group, L.L.C.
		its Managing Member
	By:	TCG Holdings, L.L.C.
		its Managing Member
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director
TCG HIGH YIELD, L.L.C.
	By:	TCG High Yield Holdings, L.L.C.
		its Managing Member
	By:	TC Group, L.L.C.
		its Managing Member
	By:	TCG Holdings, L.L.C.
		its Managing Member
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director
CARLYLE PARTNERS III, L.P.
	By:	TC Group III, L.P.,
		its General Partner
	By:	TC Group III, L.L.C.,
		its General Partner
	By:	TC Group, L.L.C.,
		its Managing Member
	By:	TCG Holdings, L.L.C.,
		its Managing Member
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director

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CP III COINVESTMENT, L.P.
	By:	TC Group III, L.P.,
		its General Partner
	By:	TC Group III, L.L.C.,
		its General Partner
	By:	TC Group, L.L.C.,
		its Managing Member
	By:	TCG Holdings, L.L.C.,
		its Managing Member
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director
CARLYLE-DEX PARTNERS L.P.
	By:	TC Group III, L.P.,
		its General Partner
	By:	TC Group III, L.L.C.,
		its General Partner
	By:	TC Group, L.L.C.,
		its Managing Member
	By:	TCG Holdings, L.L.C.,
		its Managing Member
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director
CARLYLE-DEX PARTNERS II L.P.
	By:	TC Group III, L.P.,
		its General Partner
	By:	TC Group III, L.L.C.,
		its General Partner
	By:	TC Group, L.L.C.,
		its Managing Member

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	By:	TCG Holdings, L.L.C.,
		its Managing Member
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director
CARLYLE HIGH YIELD PARTNERS, L.P.
	By:	TCG High Yield, L.L.C.,
		its General Partner
	By:	TCG High Yield Holdings, L.L.C.,
		its Managing Member
	By:	TC Group, L.L.C.,
		its Sole Member
	By:	TCG Holdings, L.L.C.,
		its Managing Member
	By:	/s/ John Harris
		Name:	John Harris
		Title:	Managing Director

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