Exhibit 21.1
Subsidiaries of the Registrant |
| State/Country of Incorporation or Organization |
Latisys SPV, Inc. |
| California |
AboveNet Communications, LLC |
| Delaware |
Allstream Fiber U.S., Inc. |
| Delaware |
FiberNet Telecom, Inc. |
| Delaware |
Neo Telecoms LLC |
| Delaware |
USCarrier, LLC |
| Delaware |
Zayo Capital, Inc. |
| Delaware |
Zayo Colocation, LLC |
| Delaware |
Zayo Corelink Acquisition Sub, LLC |
| Delaware |
Zayo Professional Services, LLC |
| Delaware |
Latisys-Chicago Holdings Corp. |
| Delaware |
Latisys Holdings Corp. |
| Delaware |
Latisys-Ashburn Holdings Corp. |
| Delaware |
Latisys Corp. |
| Delaware |
Latisys-Irvine, LLC |
| Delaware |
Latisys-Irvine Properties, LLC |
| Delaware |
Latisys-Denver, LLC |
| Delaware |
Latisys-Chicago, LLC |
| Delaware |
Latisys-Ashburn, LLC |
| Delaware |
Colo Facilities Atlanta, LLC |
| Georgia |
FiberLink, LLC |
| Illinois |
IdeaTek Systems, Inc. |
| Kansas |
Access Communications, Inc. |
| Minnesota |
Local Fiber, LLC |
| New York |
Clearview International, LLC |
| Texas |
CVMS Waco Data Partners, LLC |
| Texas |
Zayo Infrastructure Belgium NV |
| Belgium |
360networks Vancouver Ltd. |
| Canada |
Delphi Solutions Corp. |
| Canada |
Zayo Canada Inc. |
| Canada |
Zayo Group Canada Inc. |
| Canada |
Intexan SARL |
| France |
Neo Telecom Group SAS |
| France |
NeoClyde SAS |
| France |
Serenisys SARL |
| France |
Zayo Enterprise France SAS |
| France |
Zayo France SAS |
| France |
Zayo Infrastructure France SA |
| France |
Viatel Deutschland GmbH |
| Germany |
Viatel Infrastructure Deutschland GmbH |
| Germany |
Emerald Bridge Fibre Limited |
| Ireland |
Zayo Infrastructure Europe Limited |
| Ireland |
Zayo Infrastructure Ireland Limited |
| Ireland |
MFN Japan KK |
| Japan |
Zayo Infrastructure Nederland B.V. |
| Netherlands |
Zayo Nederland B.V. |
| Netherlands |
Zayo Infrastructure Switzerland AG |
| Switzerland |
Ego Acquisition Limited |
| United Kingdom |
Ego Holdings Limited |
| United Kingdom |
Ego Midco Limited |
| United Kingdom |
FibreSpeed Limited |
| United Kingdom |
Geo Metro Limited |
| United Kingdom |
Geo Networks Limited |
| United Kingdom |
Zayo Infrastructure (UK) Limited |
| United Kingdom |
Zayo Group International Limited |
| United Kingdom |
Zayo Group UK Limited |
| United Kingdom |
Zayo Group EU Limited |
| United Kingdom |
Zayo (UK) Limited |
| United Kingdom |