**Exhibit** **21.1**

 
| **Subsidiary**                           |   | **State  of****Incorporation****or Organization** |
|------------------------------------------|--------|---------------------------------------------------|
| 2 PARAGON REALTY L.L.C                   |   | DE                                                |
| 3 ODELL REALTY L.L.C.                    |   | NY                                                |
| 3 PARAGON REALTY L.L.C.                  |   | DE                                                |
| 4 GATEHALL REALTY L.L.C.                 |   | NJ                                                |
| 4 SENTRY HOLDING L.L.C.                  |   | DE                                                |
| 4 SENTRY REALTY L.L.C.                   |   | DE                                                |
| 5 WOOD HOLLOW REALTY,  L.L.C.            |   | NJ                                                |
| 5/6 SKYLINE REALTY L.L.C.                |   | NY                                                |
| 6 PARSIPPANY L.L.C.                      |   | NJ                                                |
| 9 CAMPUS REALTY L.L.C.                   |   | NJ                                                |
| 11 COMMERCE DRIVE  ASSOCIATES L.L.C.     |   | NJ                                                |
| 12 SKYLINE ASSOCIATES  L.L.C.            |   | NY                                                |
| 14/16 SKYLINE REALTY L.L.C.              |   | NY                                                |
| 14 COMMERCE REALTY L.L.C.                |   | NJ                                                |
| 20 COMMERCE DRIVE ASSOCIATES  L.L.C.     |   | NJ                                                |
| 25 COMMERCE REALTY, L.L.C.               |   | NJ                                                |
| 78/PINSON PARTNERS L.L.C.                |   | NJ                                                |
| 100 WILLOWBROOK REALTY  L.L.C.           |   | DE                                                |
| 120  PASSAIC STREET L.L.C.               |   | NJ                                                |
| 201 WILLOWBROOK FUNDING  L.L.C.          |   | NJ                                                |
| 225 CORPORATE REALTY L.L.C.              |   | NY                                                |
| 232 STRAWBRIDGE REALTY  L.L.C.           |   | NJ                                                |
| 300 HORIZON REALTY L.L.C.                |   | NJ                                                |
| 300 TICE REALTY ASSOCIATES  L.L.C.       |   | NJ                                                |
| 400 CHESTNUT REALTY L.L.C.               |   | NJ                                                |
| 400 RELLA REALTY ASSOCIATES  L.L.C.      |   | NY                                                |
| 461 FROM REALTY L.L.C.                   |   | NJ                                                |
| 500 COLUMBIA TURNPIKE  ASSOCIATES L.L.C. |   | NJ                                                |
| 500 WEST PUTNAM L.L.C.                   |   | CT                                                |
| 600 HORIZON CENTER L.L.C.                |   | NJ                                                |
| 600 PARSIPPANY ASSOCIATES  L.L.C.        |   | NJ                                                |

 

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| 795 FOLSOM REALTY  ASSOCIATES L.P.                          |   | CA |
|-------------------------------------------------------------|--------|----|
| 1000 BRIDGEPORT REALTY  L.L.C.                              |   | CT |
| 1266 SOUNDVIEW REALTY  L.L.C.                               |   | CT |
| 1717 REALTY ASSOCIATES  L.L.C.                              |   | NJ |
| AIRPORT PROPERTIES  ASSOCIATES L.L.C.                       |   | NJ |
| BMP MOORESTOWN REALTY  L.L.C.                               |   | NJ |
| BMP SOUTH REALTY L.L.C.                                     |   | NJ |
| BRIDGE PLAZA REALTY  ASSOCIATES L.L.C.                      |   | NJ |
| C.W. ASSOCIATES L.L.C.                                      |   | NJ |
| CAL-HARBOR II &  III URBAN RENEWAL ASSOCIATES L.P. |   | NJ |
| CAL-HARBOR IV URBAN RENEWAL  ASSOCIATES L.P.                |   | NJ |
| CAL-HARBOR V LEASING  ASSOCIATES L.L.C.                     |   | NJ |
| CAL-HARBOR V URBAN RENEWAL  ASSOCIATES L.P.                 |   | NJ |
| CAL-HARBOR VI URBAN RENEWAL  ASSOCIATES L.P.                |   | NJ |
| CAL-HARBOR VII LEASING  ASSOCIATES L.L.C.                   |   | NJ |
| CAL-HARBOR VII URBAN  RENEWAL ASSOCIATES L.P.               |   | NJ |
| CAL-HARBOR SO. PIER URBAN  RENEWAL ASSOCIATES L.P.          |   | NJ |
| CAL-TREE REALTY ASSOCIATES  L.P.                            |   | PA |
| CALI HARBORSIDE PLAZA I  (FEE) ASSOCIATES L.P.              |   | NJ |
| CENTURY PLAZA ASSOCIATES  L.L.C.                            |   | NJ |
| CLEARBROOK ROAD ASSOCIATES  L.L.C.                          |   | NY |
| COLLEGE ROAD REALTY L.L.C.                                  |   | NJ |
| COMMERCENTER REALTY  ASSOCIATES L.L.C.                      |   | NJ |
| CROSS WESTCHESTER REALTY  ASSOCIATES L.L.C.                 |   | NY |
| CWLT ROSELAND EXCHANGE  L.L.C.                              |   | NJ |
| D.B.C. REALTY L.L.C.                                        |   | NJ |
| ELMSFORD REALTY ASSOCIATES  L.L.C.                          |   | NY |

 

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| EMPIRE STATE VEHICLE  LEASING L.L.C.              |   | NY |
|---------------------------------------------------|--------|----|
| FIVE SENTRY REALTY  ASSOCIATES L.P.               |   | PA |
| GARDEN STATE VEHICLE  LEASING L.L.C.              |   | NJ |
| HARBORSIDE HOSPITALITY  CORP.                     |   | NJ |
| HORIZON CENTER REALTY  ASSOCIATES L.L.C.          |   | NJ |
| JUMPING BROOK REALTY  ASSOCIATES L.L.C.           |   | NJ |
| KEMBLE PLAZA II REALTY  L.L.C.                    |   | NJ |
| KEYSTONE VEHICLE LEASING  L.L.C.                  |   | PA |
| KNIGHTSBRIDGE REALTY L.L.C.                       |   | NJ |
| LINWOOD REALTY L.L.C.                             |   | NJ |
| LITTLETON REALTY ASSOCIATES  L.L.C.               |   | NJ |
| M-C  CALIFORNIA SERVICES, INC.                    |   | DE |
| M-C CAPITOL ASSOCIATES  L.L.C.                    |   | DE |
| M-C HARSIMUS PARTNERS  L.L.C.                     |   | NJ |
| M-C PENN MANAGEMENT TRUST                         |   | MD |
| M-C PROPERTIES CO. REALTY  L.L.C.                 |   | NJ |
| M-C RED BANK REALTY L.L.C.                        |   | NJ |
| M-C ROCKLAND PARTNERS L.P.                        |   | NY |
| MACK-CALI ADVANTAGE  SERVICES CORPORATION         |   | DE |
| MACK-CALI AIRPORT REALTY  ASSOCIATES L.P.         |   | PA |
| MACK-CALI B PROPERTIES,  L.L.C.                   |   | NJ |
| MACK-CALI BRIDGEWATER  REALTY L.L.C.              |   | NJ |
| MACK-CALI BUILDING V  ASSOCIATES L.L.C.           |   | NJ |
| MACK-CALI BUSINESS CAMPUS  ASSOCIATES, INC.       |   | NJ |
| MACK-CALI CALIFORNIA  DEVELOPMENT ASSOCIATES L.P. |   | CA |
| MACK-CALI CALIFORNIA  PARTNERS L.P.               |   | CA |
| MACK-CALI CAMPUS REALTY  L.L.C.                   |   | NJ |
| MACK-CALI CHESTNUT RIDGE,  L.L.C.                 |   | NJ |

 

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| MACK-CALI CW REALTY  ASSOCIATES L.L.C.         |   | NY |
|------------------------------------------------|--------|----|
| MACK-CALI D.C. MANAGEMENT  CORP                |   | DE |
| MACK-CALI  E-COMMERCE L.L.C.                   |   | DE |
| MACK-CALI EAST LAKEMONT  L.L.C.                |   | NJ |
| MACK-CALI F PROPERTIES L.P.                    |   | NJ |
| MACK-CALI GLENDALE LIMITED  PARTNERSHIP        |   | AZ |
| MACK-CALI HAMILTON, L.L.C.                     |   | NJ |
| MACK-CALI HOLMDEL L.L.C.                       |   | DE |
| MACK-CALI JOHNSON ROAD  L.L.C.                 |   | NJ |
| MACK-CALI MATAWAN L.L.C.                       |   | NJ |
| MACK-CALI MEADOWLANDS  ENTERTAINMENT L.L.C.    |   | NJ |
| MACK-CALI MEADOWLANDS  SPECIAL L.L.C.          |   | NJ |
| MACK-CALI MID-WEST REALTY  ASSOCIATES L.L.C.   |   | NY |
| MACK-CALI MORRIS REALTY  L.L.C.                |   | NJ |
| MACK-CALI PLAZA I, L.L.C.                      |   | NJ |
| MACK-CALI PENNSYLVANIA  REALTY ASSOCIATES L.P. |   | PA |
| MACK-CALI PROPERTY TRUST                       |   | MD |
| MACK-CALI RIVERSIDE REALTY  L.L.C.             |   | NJ |
| MACK-CALI SERVICES, INC.                       |   | NJ |
| MACK-CALI SHORT HILLS  L.L.C.                  |   | NJ |
| MACK-CALI SPRINGING L.L.C.                     |   | DE |
| MACK-CALI SO. WEST REALTY  ASSOCIATES L.L.C.   |   | NY |
| MACK-CALI SUB XV, TRUST                        |   | MD |
| MACK-CALI TAXTER ASSOCIATES  L.L.C.            |   | NY |
| MACK-CALI TEXAS PROPERTY  L.P.                 |   | TX |
| MACK-CALI TRS HOLDING  CORPORATION             |   | DE |
| MACK-CALI WILLOWBROOK  COMPANY L.L.C.          |   | NJ |
| MACK-CALI WOODBRIDGE L.L.C.                    |   | NJ |
| MACK-CALI WP REALTY  ASSOCIATES L.L.C.         |   | NY |
| MACK-CALI-R COMPANY NO. 1  L.P.                |   | NJ |
| MAPLE 4 CAMPUS REALTY  L.L.C.                  |   | NJ |
| MAPLE 6 CAMPUS REALTY  L.L.C.                  |   | NJ |
| MC HUDSON HOLDING L.L.C.                       |   | NJ |
| MC HUDSON REALTY L.L.C.                        |   | NJ |
| MC ONE RIVER GENERAL L.L.C.                    |   | NJ |
| MC ONE RIVER LIMITED L.L.C.                    |   | NJ |

 

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| MC-SJP  PINSON DEVELOPMENT, L.L.C.                       |   | DE |
|----------------------------------------------------------|--------|----|
| MID-WESTCHESTER REALTY  ASSOCIATES L.L.C.                |   | NY |
| MONMOUTH/ATLANTIC REALTY  ASSOCIATES L.L.C.              |   | NJ |
| MONUMENT 150 REALTY L.L.C.                               |   | DE |
| MONUMENT HOLDING L.L.C.                                  |   | DE |
| MOORESTOWN REALTY  ASSOCIATES L.L.C.                     |   | NJ |
| MOUNT AIRY REALTY  ASSOCIATES L.L.C.                     |   | NJ |
| MOUNTAINVIEW REALTY L.L.C.                               |   | NJ |
| OFFICE ASSOCIATES L.L.C.                                 |   | NJ |
| ONE RIVER ASSOCIATES                                     |   | NJ |
| ONE SYLVAN REALTY, L.L.C.                                |   | NJ |
| PA UTILIPRO SOLUTIONS TRUST                              |   | MD |
| PALLADIUM REALTY L.L.C.                                  |   | NJ |
| PARSIPPANY 4/5 REALTY  L.L.C.                            |   | NJ |
| PARSIPPANY CAMPUS REALTY  ASSOCIATES L.L.C.              |   | NJ |
| PHELAN REALTY ASSOCIATES  L.P.                           |   | CA |
| PLAZA VIII & IX  ASSOCIATES L.L.C.                   |   | NJ |
| PRINCETON CORPORATE CENTER  REALTY ASSOCIATES L.L.C.     |   | NJ |
| PRINCETON JUNCTION METRO  OFFICE CENTER ASSOCIATES, INC. |   | NJ |
| PRINCETON OVERLOOK REALTY  L.L.C.                        |   | NJ |
| RAMLAND REALTY ASSOCIATES  L.L.C.                        |   | NY |
| ROSELAND II L.L.C.                                       |   | NJ |
| ROSELAND OWNERS ASSOCIATES  L.L.C.                       |   | NJ |
| SENTRY PARK WEST L.L.C.                                  |   | PA |
| SIX COMMERCE DRIVE  ASSOCIATES L.L.C.                    |   | NJ |
| SKYLINE REALTY L.L.C.                                    |   | NY |
| SO. WESTCHESTER REALTY  ASSOCIATES L.L.C.                |   | NY |
| STEVENS AIRPORT REALTY ASSOCIATES  L.P.                  |   | PA |
| SYLVAN/CAMPUS REALTY L.L.C.                              |   | NJ |

 

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| TALLEYRAND REALTY  ASSOCIATES L.L.C.                  |   | NY |
|-------------------------------------------------------|--------|----|
| TERRI REALTY ASSOCIATES  L.L.C.                       |   | NJ |
| THE HORIZON CENTER PROPERTY  OWNERS ASSOCIATION, INC. |   | NJ |
| TRIAD REALTY ASSOCIATES  L.L.C.                       |   | DE |
| TRIAD REALTY HOLDINGS L.L.C.                          |   | DE |
| U.S.  UTILIPRO SOLUTIONS L.L.C.                       |   | DE |
| UTILIPRO SOLUTIONS, INC.                              |   | NJ |
| VAUGHN PARTNERS L.L.C.                                |   | NJ |
| VAUGHN PRINCETON ASSOCIATES  L.L.C.                   |   | NJ |
| WEST AVENUE REALTY  ASSOCIATES L.L.C.                 |   | CT |
| WESTAGE REALTY L.L.C.                                 |   | NY |
| WHITE PLAINS REALTY  ASSOCIATES L.L.C.                |   | NY |

 

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