Exhibit 21
In Effect as of December 31, 2008
Subsidiaries of: |
| Jurisdiction |
COGENT COMMUNICATIONS GROUP, INC. |
| (Delaware corporation) |
|
|
|
COGENT COMMUNICATIONS, INC. |
| (Delaware corporation) |
COGENT COMMUNICATIONS OF CALIFORNIA, INC. |
| (Delaware corporation) |
NETWORK EQUIPMENT SOLUTIONS, LLC |
| (Delaware LLC) |
UFO GROUP, INC. |
| (Delaware corporation) |
ALLIED RISER COMMUNICATIONS CORPORATION |
| (Delaware corporation) |
ALLIED RISER OPERATIONS CORPORATION |
| (Delaware corporation) |
COGENT IH, LLC |
| (Delaware LLC) |
COGENT WG, LLC |
| (Delaware LLC) |
COGENT COMMUNICATIONS OF D.C., INC. |
| (Delaware corporation) |
COGENT COMMUNICATIONS OF FLORIDA, INC. |
| (Delaware corporation) |
COGENT COMMUNICATIONS OF MARYLAND, INC. |
| (Delaware corporation) |
COGENT COMMUNICATIONS OF TEXAS, INC. |
| (Delaware corporation) |
SYMPOSIUM GAMMA, INC. |
| (Delaware corporation) |
COGENT CANADA, INC. |
| (Nova Scotia corporation) |
CCM COMMUNICATIONS S. de R.L. de C.V. |
| (Mexican corporation) |
COGENT EUROPE, S.À.R.L. |
| (Luxembourg corporation) |
COGENT BELGIUM SPRL |
| (Belgian corporation) |
COGENT COMMUNICATIONS BULGARIA EOOD |
| (Bulgarian corporation) |
COGENT INTERNET d.o.o. |
| (Croatian corporation) |
COGENT COMMUNICATIONS CZECH REPUBLIC, s.r.o. |
| (Czech corporation) |
COGENT COMMUNICATIONS DENMARK ApS |
| (Danish corporation) |
COGENT COMMUNICATIONS ESTONIA, OÜ |
| (Estonian corporation) |
COGENT COMMUNICATIONS FINLAND OY |
| (Finnish corporation) |
COGENT COMMUNICATIONS FRANCE, SAS |
| (French corporation) |
C.C.D. COGENT COMMUNICATIONS DEUTSCHLAND GMBH |
| (German corporation) |
(with a branch office in Austria and Sweden) |
|
|
COGENT COMMUNICATIONS HUNGARY, KFT. |
| (Hungarian corporation) |
CCE COGENT INTERNET SERVICES LIMITED |
| (Irish corporation) |
COGENT COMMUNICATIONS ITALIA S.R.L. |
| (Italian corporation) |
COGENT COMMUNICATIONS NETHERLANDS B.V. |
| (Dutch corporation) |
COGENT NORWAY AS |
| (Norwegian corporation) |
COGENT COMMUNICATIONS POLAND Sp. zo. o. |
| (Polish corporation) |
COGENT COMMUNICATIONS PORTUGAL, LDA. |
| (Portuguese corporation) |
COGENT COMMUNICATIONS ROMANIA SRL |
| (Romanian corporation) |
COGENT COMMUNICATIONS d.o.o. |
| (Serbian corporation) |
COGENT COMMUNICATIONS SLOVAKIA s.r.o. |
| (Slovak corporation) |
COGENT ADRIA, KOMUNIKACIJE, d.o.o. |
| (Slovenian corporation) |
COGENT COMMUNICATIONS ESPAÑA S.A. | (Spanish corporation) | |
COGENT COMMUNICATIONS SWEDEN AB |
| (Swedish corporation) |
COGENT INTERNET SWITZERLAND LLC |
| (Swiss corporation) |
TOV COGENT COMMUNICATIONS UKRAINE |
| (Ukraine corporation) |
COGENT COMMUNICATIONS UK LTD |
| (English / UK corporation) |