Exhibit 21 UNITED RENTALS, INC. & SUBSIDIARIES Those corporations which are indented represent subsidiaries of the corporation under which they are indented. - ---------------------------------------------------------------------------------------------------- State of Name of Subsidiary Incorporation - ---------------------------------------------------------------------------------------------------- United Rentals, Inc. Delaware - ---------------------------------------------------------------------------------------------------- United Rentals Trust I Delaware - ---------------------------------------------------------------------------------------------------- United Rentals (North America), Inc. Delaware - ---------------------------------------------------------------------------------------------------- All Cities Trailer Exchange, Inc. California - ---------------------------------------------------------------------------------------------------- Rentals Unlimited, Incorporated Rhode Island - ---------------------------------------------------------------------------------------------------- United Rentals Gulf, Inc. Delaware - ---------------------------------------------------------------------------------------------------- United Rentals (Delaware), Inc. Delaware - ---------------------------------------------------------------------------------------------------- Provisto, S. de R.L. de C.V. (United Rentals (Delaware), Mexico Inc. owns 99.99%, United Rentals Northwest, Inc. owns .01% ) - ---------------------------------------------------------------------------------------------------- United Rentals, S. de R.L. de C.V. (United Rentals Mexico (Delaware), Inc. owns 99.99%, United Rentals Northwest, Inc. owns .01% ) - ---------------------------------------------------------------------------------------------------- United Rentals of Nova Scotia (No.1), ULC Nova Scotia - ---------------------------------------------------------------------------------------------------- United Rentals of Nova Scotia (No.2), ULC Nova Scotia - ---------------------------------------------------------------------------------------------------- UR Canadian Financing Partnership (United Nova Scotia Rentals Nova Scotia (No.1), ULC is 99% Managing Partner, United Rentals Nova Scotia (No.2), ULC is 1% Non-Managing Partner) - ---------------------------------------------------------------------------------------------------- United Equipment Rentals Gulf, L.P. Texas (United Rentals Gulf, Inc. is 99% L.P., United Rentals (North America), Inc. is 1% G.P.) - ---------------------------------------------------------------------------------------------------- United Rentals of Canada, Inc. Canada - ---------------------------------------------------------------------------------------------------- Hickman Rent-Alls (1999)Ltd. Newfoundland - ---------------------------------------------------------------------------------------------------- 794815 Alberta Inc. Alberta - ---------------------------------------------------------------------------------------------------- United Rentals Highway Technologies, Inc. (f/k/a Liddell Bros., Inc.) Massachusetts - ---------------------------------------------------------------------------------------------------- Highway Rentals, Inc. Nevada - ---------------------------------------------------------------------------------------------------- United Rentals Highway Technologies Gulf, Inc. Delaware - ---------------------------------------------------------------------------------------------------- United Rentals Highway Technologies, L.P. Texas (United Rentals Highway Technologies Gulf, Inc. is 6.75% L.P.,United Rentals Gulf, Inc. is 92.25% L.P. and United Rentals (North America), Inc. is 1% G.P.) - ---------------------------------------------------------------------------------------------------- United Rentals Northwest, Inc. (f/k/a High Reach, Inc.) Oregon - ---------------------------------------------------------------------------------------------------- United Rentals Receivables LLC I ("SPV I") Delaware - ---------------------------------------------------------------------------------------------------- United Rentals Receivables LLC II ("SPV II") Delaware - ---------------------------------------------------------------------------------------------------- United Rentals Southeast, Inc. Delaware - ---------------------------------------------------------------------------------------------------- United Rentals Southeast Holding LLC (United Rentals Georgia Southeast, Inc. is 99% Non-Managing Member, United Rentals (North America),Inc. is 1% Managing Member) - ---------------------------------------------------------------------------------------------------- United Rentals Southeast, L.P. (United Rentals Georgia Southeast Holding LLC. is 99% L.P., United Rentals (North America), Inc. is 1% G.P.) - ---------------------------------------------------------------------------------------------------- Wanamaker Rents, Incorporated California - ---------------------------------------------------------------------------------------------------- Wynne Systems, Inc. California - ----------------------------------------------------------------------------------------------------