Exhibit 21.1
In Effect as of December 31, 2009
Subsidiaries of:
|
| Jurisdiction |
COGENT COMMUNICATIONS GROUP, INC. |
| (Delaware) |
|
|
|
COGENT COMMUNICATIONS, INC. |
| (Delaware) |
COGENT COMMUNICATIONS OF CALIFORNIA, INC. |
| (Delaware) |
NETWORK EQUIPMENT SOLUTIONS, LLC |
| (Delaware) |
UFO GROUP, INC. |
| (Delaware) |
ALLIED RISER COMMUNICATIONS CORPORATION |
| (Delaware) |
ALLIED RISER OPERATIONS CORPORATION |
| (Delaware) |
COGENT IH, LLC |
| (Delaware) |
COGENT WG, LLC |
| (Delaware) |
COGENT COMMUNICATIONS OF D.C., INC. |
| (Delaware) |
COGENT COMMUNICATIONS OF FLORIDA, INC. |
| (Delaware) |
COGENT COMMUNICATIONS OF MARYLAND, INC. |
| (Delaware) |
COGENT COMMUNICATIONS OF TEXAS, INC. |
| (Delaware) |
SYMPOSIUM GAMMA, INC. |
| (Delaware) |
COGENT CANADA, INC. |
| (Nova Scotia) |
CCM COMMUNICATIONS S. de R.L. de C.V. |
| (Mexico) |
|
|
|
COGENT EUROPE, S.À.R.L. |
| (Luxembourg) |
COGENT BELGIUM SPRL |
| (Belgium) |
COGENT COMMUNICATIONS BULGARIA EOOD |
| (Bulgaria) |
COGENT INTERNET d.o.o. |
| (Croatia) |
COGENT COMMUNICATIONS CZECH REPUBLIC, s.r.o. |
| (Czech Republic) |
COGENT COMMUNICATIONS DENMARK ApS |
| (Denmark) |
COGENT COMMUNICATIONS ESTONIA, OÜ |
| (Estonia) |
COGENT COMMUNICATIONS FINLAND OY |
| (Finland) |
COGENT COMMUNICATIONS FRANCE, SAS |
| (France) |
C.C.D. COGENT COMMUNICATIONS DEUTSCHLAND GMBH |
| (Germany) |
COGENT COMMUNICATIONS HUNGARY, KFT. |
| (Hungary) |
CCE COGENT INTERNET SERVICES LIMITED |
| (Ireland) |
COGENT COMMUNICATIONS ITALIA S.R.L. |
| (Italy) |
COGENT COMMUNICATIONS NETHERLANDS B.V. |
| (The Netherlands) |
COGENT NORWAY AS |
| (Norway) |
COGENT COMMUNICATIONS POLAND Sp. zo. o. |
| (Poland) |
COGENT COMMUNICATIONS PORTUGAL, LDA. |
| (Portugal) |
COGENT COMMUNICATIONS ROMANIA SRL |
| (Romania) |
COGENT COMMUNICATIONS d.o.o. |
| (Serbia) |
COGENT COMMUNICATIONS SLOVAKIA s.r.o. |
| (Slovak Republic) |
COGENT ADRIA, KOMUNIKACIJE, d.o.o. |
| (Slovenia) |
COGENT COMMUNICATIONS ESPAÑA S.A. |
| (Spain) |
COGENT COMMUNICATIONS SWEDEN AB |
| (Sweden) |
COGENT INTERNET SWITZERLAND LLC |
| (Switzerland) |
TOV COGENT COMMUNICATIONS UKRAINE |
| (The Ukraine) |
COGENT COMMUNICATIONS UK LTD |
| (United Kingdom) |