Attached files

file filename
EX-32 - EXHIBIT 32 - PAETEC Holding Corp.dex32.htm
EX-23 - EXHIBIT 23 - PAETEC Holding Corp.dex23.htm
EX-31.1 - EXHIBIT 31.1 - PAETEC Holding Corp.dex311.htm
EX-4.5.7 - EXHIBIT 4.5.7 - PAETEC Holding Corp.dex457.htm
EX-4.6.7 - EXHIBIT 4.6.7 - PAETEC Holding Corp.dex467.htm
EX-4.6.8 - EXHIBIT 4.6.8 - PAETEC Holding Corp.dex468.htm
EX-4.5.6 - EXHIBIT 4.5.6 - PAETEC Holding Corp.dex456.htm
EX-31.2 - EXHIBIT 31.2 - PAETEC Holding Corp.dex312.htm
EX-4.5.8 - EXHIBIT 4.5.8 - PAETEC Holding Corp.dex458.htm
EX-12.1 - EXHIBIT 12.1 - PAETEC Holding Corp.dex121.htm
EX-10.15 - EXHIBIT 10.15 - PAETEC Holding Corp.dex1015.htm
EX-10.19 - EXHIBIT 10.19 - PAETEC Holding Corp.dex1019.htm
10-K - FORM 10-K FOR THE FISCAL YEAR ENDED DECEMBER 31, 2010 - PAETEC Holding Corp.d10k.htm

Exhibit 21




State of Incorporation or Organization

PAETEC Corp.    Delaware
PaeTec Communications, Inc.    Delaware
PaeTec Communications of Virginia, Inc.    Virginia
PAETEC Integrated Solutions Group, Inc.    Delaware
PAETEC Software Corp.    New York
PAETEC iTEL, L.L.C.    North Carolina
US LEC LLC    Delaware
US LEC Communications LLC (1)    North Carolina
US LEC of Alabama LLC (1)    North Carolina
US LEC of Florida LLC (1)    North Carolina
US LEC of Georgia LLC (1)    Delaware
US LEC of Maryland LLC (1)    North Carolina
US LEC of North Carolina LLC (1)    North Carolina
US LEC of Pennsylvania LLC (1)    North Carolina
US LEC of South Carolina LLC (1)    Delaware
US LEC of Tennessee LLC (1)    Delaware
US LEC of Virginia L.L.C. (1)    Delaware
Allworx Corp.    Delaware
MPX, Inc.    Delaware
Technology Resource Solutions, Inc. (2)    New York
McLeodUSA LLC    Delaware
McLeodUSA Information Services LLC    Delaware
McLeodUSA Telecommunications Services, L.L.C. (1)    Iowa
McLeodUSA Purchasing, L.L.C.    Iowa
U.S. Energy Partners LLC (3)    New York
PAETEC Realty LLC    New York
Quagga Corporation    California
Cavalier Telephone Corporation    Delaware
CavTel Holdings, LLC    Delaware
Cavalier Telephone LLC    Virginia
Cavalier IP TV, LLC    Delaware
Cavalier Services, LLC    Delaware
Elantic Networks, Inc.    Delaware
SM Holdings, LLC    Delaware
Talk America Holdings, Inc.    Delaware
Access One Communications Corp.    New Jersey
Compco, Inc.    Delaware
Talk America of Virginia, Inc.    Virginia
Talk America Inc. (1)    Pennsylvania
LDMI Telecommunications, Inc.    Michigan
NT Corporation    Delaware
TC Services Holding Co., Inc.    Pennsylvania
Cavalier Telephone Mid-Atlantic, L.L.C.    Delaware
Intellifiber Networks, Inc.    Virginia
Network Telephone Corporation    Florida
OmniCall, Inc.    South Carolina
The Other Phone Company, Inc.    Florida


(1) Doing business as PAETEC Business Services.


(2) Doing business as PAETEC Energy.


(3) Doing business as PAETEC Energy Marketing Corp.