Exhibit 21.1
QUANTA SERVICES, INC. — SUBSIDIARIES LIST
The following is a list of the significant subsidiaries of Quanta Services, Inc. showing the place of incorporation or organization and the names under which each subsidiary does business. The names of certain subsidiaries are omitted as such subsidiaries, considered as a single subsidiary, would not constitute a significant subsidiary.
| State of | ||
| Subsidiary/Doing Business As | Incorporation/Organization | |
| Advanced Technologies and Installation Corporation | Washington | |
| Allteck Line Contractors (USA), Inc. | Washington | |
| Allteck Line Contractors, Inc. | British Columbia | |
| Arby Construction, Inc. | Delaware | |
| Austin Trencher, Inc. | Delaware | |
| Bradford Brothers, Inc. | North Carolina | |
| Quanta Underground Services | ||
| CCLC, Inc. | Delaware | |
| CMI Services, Inc. | Florida | |
| Conti Communications, Inc. | Delaware | |
| DE Conti Communications, Inc. | ||
| Croce Electric Company, Inc. | Delaware | |
| Crown Fiber Communications, Inc. | Virginia | |
| Myers Cable, Inc. | ||
| World Fiber | ||
| Digco Utility Construction, L.P. | Texas | |
| Brown Engineering | ||
| Ranger Field Services | ||
| Dillard Smith Construction Company | Delaware | |
| Driftwood Electrical Contractors, Inc. | Delaware | |
| Maddux Communications | ||
| Environmental Professional Associates, Limited | California | |
| Provco | ||
| Five Points Construction Co. | Texas | |
| Global Enercom Management, Inc. | Delaware | |
| Golden State Utility Co. | Delaware | |
| H.L. Chapman Pipeline Construction, Inc. | Delaware | |
| DB Utilities | ||
| Sullivan Welding | ||
| Intermountain Electric, Inc. | Colorado | |
| Colorado IM Electric | ||
| Grand Electric | ||
| Irby Construction Company | Mississippi | |
| Lindsey Electric, L.P. | Texas | |
| Manuel Bros., Inc. | Delaware | |
| Renaissance Construction | ||
| Western Directional |
| State of | ||
| Subsidiary/Doing Business As | Incorporation/Organization | |
| Mears Canada Corp. | Nova Scotia | |
| Mears Engineering/LLC | Michigan | |
| Mears Group, Inc. | Delaware | |
| Mears Services LLC | Michigan | |
| Mears/CPG LLC | Michigan | |
| Mears/HDD LLC | Michigan | |
| Mearsmex S. de R.L. de C.V. | Mexico | |
| Mejia Personnel Services, Inc. | Texas | |
| Metro Underground Services, Inc. of Illinois | Illinois | |
| Network Electric Company | Delaware | |
| DE Network Electric Company | ||
| North Houston Pole Line, L.P. | Delaware | |
| North Houston Pole Line Corp. | ||
| North Sky Communications, Inc. | Delaware | |
| Sky Communications | ||
| Okay Construction Company, LLC | Delaware | |
| PAR Electrical Contractors, Inc. | Missouri | |
| Par Infrared Consultants | ||
| Riggin & Diggin Line Construction | ||
| Seaward | ||
| Seaward Corporation | ||
| Par Internacional, S. de R.L. de C.V. | Mexico | |
| Parkside Site & Utility Company Corporation | Delaware | |
| Parkside Utility Construction Corp. | Delaware | |
| Potelco, Inc. | Washington | |
| Kingston Constructors DBA Talking Sign Services | ||
| Kuenzi Constructors | ||
| Potelco Incorporated | ||
| Professional Teleconcepts, Inc. | Illinois | |
| JT Communications | ||
| Professional Teleconcepts, Inc. | New York | |
| PWR Financial Company | Delaware | |
| PWR Network, LLC | Delaware | |
| QDE LLC | Delaware | |
| QPC, Inc. | Delaware | |
| QSI, Inc. | Delaware | |
| Quanta Asset Management LLC | Delaware | |
| Quanta Associates, L.P. | Texas | |
| Quanta Delaware, Inc. | Delaware | |
| Quanta Government Services, Inc. | Delaware | |
| Quanta Government Solutions, Inc. | Delaware | |
| Quanta International Limited | British Virgin Islands | |
| Quanta Receivables, L.P. | Delaware |
| State of | ||
| Subsidiary/Doing Business As | Incorporation/Organization | |
| Quanta Services Management Partnership, L.P. | Texas | |
| Quanta Energized Services | ||
| Quanta Services of Canada Ltd. | British Columbia | |
| Quanta Utility Installation Co., Inc. | Delaware | |
| Quanta Utility Services, LLC | Delaware | |
| R.A. Waffensmith & Co., Inc. | Delaware | |
| S.K.S. Pipeliners, LLC | Delaware | |
| Servicios Par Electric, S. de R.L. de C.V. | Mexico | |
| Southeast Pipeline Construction, Inc. | Delaware | |
| Southwest Trenching Company, Inc. | Texas | |
| Spalj Construction Company | Delaware | |
| Dot 05 Optical Communications | ||
| Delaware Spaj Construction Company | ||
| Smith Contracting | ||
| Span-Con of Deerwood | ||
| Tjader & Highstrom | ||
| Throstad Brother Tiling | ||
| Wilson Roadbores | ||
| Sumter Utilities, Inc. | Delaware | |
| Sumter Builders Construction Contracting | ||
| The Ryan Company, Inc. | Massachusetts | |
| Eastern Communications | ||
| The Ryan Company Inc. of Massachusetts | ||
| The Ryan Company of Massachusetts | ||
| The Ryan Company Incorporated of Massachusetts | ||
| The Ryan Company, Incorporated Electrical Contractors | ||
| Ryan Company Inc. (The) | ||
| Tjader, L.L.C. | Delaware | |
| TNS-VA, LLC | Delaware | |
| Tom Allen Construction Company | Delaware | |
| TA Construction | ||
| Total Quality Management Services, LLC | Delaware | |
| Trans Tech Electric, L.P. | Texas | |
| Trans Tech Electric, Limited Partnership | ||
| Trawick Construction Co. | Florida | |
| TTGP, Inc. | Delaware | |
| TTLP, Inc. | Delaware | |
| TTM, Inc. | North Carolina | |
| Underground Construction Co., Inc. | Delaware | |
| Delaware Underground Construction Co. | ||
| Maryland Underground Construction Co., Inc. | ||
| Underground Construction Co., Inc. (Delaware) | ||
| Utility Line Management Services, Inc. | Delaware |
| State of | ||
| Subsidiary/Doing Business As | Incorporation/Organization | |
| VCI Telcom, Inc. | Delaware | |
| VCI Construction | ||
| W.C. Communications, Inc. | Delaware | |
| West Coast Communications |