| Form: | S-4 |
| CIK: | 0001372041 | | Company Name: | PAETEC Holding Corp. | | File Number: | 333-167138 |
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| CIK: | 0001307329 | | Company Name: | US LEC of Pennsylvania LLC | | File Number: | 333-167138-25 |
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| CIK: | 0001307330 | | Company Name: | US LEC of South Carolina LLC | | File Number: | 333-167138-24 |
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| CIK: | 0001307331 | | Company Name: | US LEC of Tennessee LLC | | File Number: | 333-167138-23 |
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| CIK: | 0001307335 | | Company Name: | US LEC of Virginia L.L.C. | | File Number: | 333-167138-22 |
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| CIK: | 0001472232 | | Company Name: | Allworx Corp. | | File Number: | 333-167138-21 |
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| CIK: | 0001472231 | | Company Name: | Technology Resource Solutions, Inc. | | File Number: | 333-167138-20 |
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| CIK: | 0001492547 | | Company Name: | U.S. Energy Partners LLC | | File Number: | 333-167138-18 |
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| CIK: | 0001492537 | | Company Name: | PAETEC Realty LLC | | File Number: | 333-167138-17 |
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| CIK: | 0001307328 | | Company Name: | US LEC of North Carolina LLC | | File Number: | 333-167138-16 |
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| CIK: | 0001307321 | | Company Name: | US LEC Communications LLC | | File Number: | 333-167138-15 |
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| CIK: | 0000919943 | | Company Name: | McLeodUSA LLC | | File Number: | 333-167138-14 |
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| CIK: | 0001388938 | | Company Name: | McLeodUSA Telecommunications Services, L.L.C. | | File Number: | 333-167138-13 |
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| CIK: | 0001388935 | | Company Name: | McLeodUSA Information Services LLC | | File Number: | 333-167138-12 |
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| CIK: | 0001388937 | | Company Name: | McLeodUSA Purchasing, L.L.C. | | File Number: | 333-167138-11 |
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| CIK: | 0001421863 | | Company Name: | PAETEC Integrated Solutions Group, Inc. | | File Number: | 333-167138-09 |
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| CIK: | 0001421919 | | Company Name: | PAETEC iTel, L.L.C. | | File Number: | 333-167138-08 |
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| CIK: | 0001421862 | | Company Name: | PaeTec Software Corp. | | File Number: | 333-167138-07 |
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| CIK: | 0001421860 | | Company Name: | PaeTec Communications, Inc. | | File Number: | 333-167138-06 |
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| CIK: | 0001421859 | | Company Name: | PaeTec Communications of Virginia, Inc. | | File Number: | 333-167138-05 |
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| CIK: | 0001307319 | | Company Name: | US LEC of Alabama LLC | | File Number: | 333-167138-04 |
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| CIK: | 0001307324 | | Company Name: | US LEC of Florida LLC | | File Number: | 333-167138-03 |
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| CIK: | 0001307325 | | Company Name: | US LEC of Georgia LLC | | File Number: | 333-167138-02 |
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| CIK: | 0001307327 | | Company Name: | US LEC of Maryland LLC | | File Number: | 333-167138-01 |
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