X0101 EFFECT 33 LIVE 2007-12-28 15:00:00

S-4

0001372041 PAETEC Holding Corp. 333-148271 0001307324 US LEC of Florida Inc. 333-148271-18 0001307327 US LEC of Maryland Inc. 333-148271-17 0001307328 US LEC of North Carolina Inc. 333-148271-16 0001307330 US LEC of South Carolina Inc. 333-148271-15 0001307331 US LEC of Tennessee Inc. 333-148271-14 0001307321 US LEC Communications Inc. 333-148271-13 0001307325 US LEC of Georgia Inc. 333-148271-12 0001307329 US LEC of Pennsylvania Inc. 333-148271-11 0001307335 US LEC of Virginia L.L.C. 333-148271-10 0001421861 US LEC of New York Inc. 333-148271-09 0001421862 PAETEC Software Corp. 333-148271-08 0001069588 PAETEC CORP 333-148271-07 0001421859 PaeTec Communications of Virginia, Inc. 333-148271-06 0001421860 PaeTec Communications, Inc. 333-148271-05 0001421863 PAETEC Integrated Solutions Group, Inc. 333-148271-04 0001421919 PAETEC iTel, L.L.C. 333-148271-03 0001054290 US LEC CORP 333-148271-02 0001307319 US LEC of Alabama Inc. 333-148271-01