EX-21.1 6 a07-5604_1ex21d1.htm EX-21.1

Exhibit 21.1

In Effect as of December 31, 2006

Subsidiaries of:

 

 

 

Jurisdiction

COGENT COMMUNICATIONS GROUP, INC.

 

(Delaware Corporation)

 

 

 

COGENT COMMUNICATIONS, INC.

 

(Delaware Corporation)

COGENT COMMUNICATIONS OF CALIFORNIA, INC.

 

(Delaware Corporation)

NETWORK EQUIPMENT SOLUTIONS, LLC

 

(Delaware LLC)

UFO GROUP, INC.

 

(Delaware Corporation)

ALLIED RISER COMMUNICATIONS CORPORATION

 

(Delaware Corporation)

ALLIED RISER OPERATIONS CORPORATION

 

(Delaware Corporation)

COGENT CANADA, INC.

 

(Nova Scotia Corporation)

COGENT COMMUNICATIONS OF D.C., INC.

 

(Delaware Corporation)

COGENT COMMUNICATIONS OF FLORIDA, INC.

 

(Delaware Corporation)

COGENT COMMUNICATIONS OF MARYLAND, INC.

 

(Delaware Corporation)

COGENT COMMUNICATIONS OF TEXAS, INC.

 

(Delaware Corporation)

COGENT COMMUNICATIONS OF VIRGINIA, INC.

 

(Virginia Corporation)

SYMPOSIUM GAMMA, INC.

 

(Delaware Corporation)

COGENT EUROPE, SARL

 

(Luxembourg)

COGENT COMMUNICATIONS FRANCE, SAS

 

(France)

COGENT COMMUNICATIONS ESPANA S.A.

 

(Spain)

COGENT COMMUNICATIONS UK LTD.

 

(England)

COGENT COMMUNICATIONS BELGIUM SPRL

 

(Belgium)

COGENT COMMUNICATIONS NETHERLANDS B.V.

 

(The Netherlands)

C.C.D. COGENT COMMUNICATIONS DEUTSCHLAND, GMBH

 

(Germany)