EXHIBIT 21
In Effect as of February 1, 2018
Legal Entity |
| Jurisdiction |
COGENT COMMUNICATIONS HOLDINGS, INC. |
| (Delaware) |
subsidiaries: |
|
|
COGENT COMMUNICATIONS GROUP, INC. |
| (Delaware) |
COGENT COMMUNICATIONS, INC. |
| (Delaware) |
COGENT COMMUNICATIONS OF CALIFORNIA, INC. |
| (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 CANADA, INC. |
| (Nova Scotia) |
CCM COMMUNICATIONS S. de R.L. de C.V. |
| (Mexico) |
COGENT COMMUNICATIONS HONG KONG LIMITED |
| (Hong Kong) |
COGENT BRASIL HOLDINGS LTDA. |
| (Brazil) |
COGENT BRASIL TELECOMUNICAÇÕES LTDA. |
| (Brazil) |
COGENT COMMUNICATIONS AUSTRALIA PTY LTD |
| (Australia) |
COGENT JAPAN G.K. |
| (Japan) |
COGENT INTERNET SINGAPORE PTE. LTD. |
| (Singapore) |
|
|
|
COGENT EUROPE, S.À.R.L. |
| (Luxembourg) |
COGENT ALBANIA SH.P.K. |
| (Albania) |
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 HELLAS INTERNET SERVICES SOLE MEMBER LLC |
| (Greece) |
COGENT COMMUNICATIONS HUNGARY, KFT. |
| (Hungary) |
CCE COGENT INTERNET SERVICES LIMITED |
| (Ireland) |
COGENT COMMUNICATIONS ITALIA S.R.L. |
| (Italy) |
COGENT LATVIA SIA |
| (Latvia) |
COGENT LITHUANIA UAB |
| (Lithuania) |
COMPANY FOR INTERNET SERVICES COGENT MACEDONIA DOOEL SKOPJE |
| (Macedonia) |
Î.C.S. COGENT INTERNET MLD S.R.L. |
| (Moldova) |
COGENT COMMUNICATIONS MONTENEGRO d.o.o. |
| (Montenegro) |
COGENT COMMUNICATIONS NETHERLANDS B.V. |
| (The Netherlands) |
COGENT MANAGEMENT BV |
| (The Netherlands) |
COGENT NORWAY AS |
| (Norway) |
COGENT COMMUNICATIONS POLAND Sp. zo. o. |
| (Poland) |
COGENT COMMUNICATIONS PORTUGAL, LDA. |
| (Portugal) |
COGENT COMMUNICATIONS ROMANIA SRL |
| (Romania) |
COGENT SERB d.o.o. BEOGRAD |
| (Serbia) |
COGENT COMMUNICATIONS SLOVAKIA s.r.o. |
| (Slovak Republic) |
COGENT ADRIA, KOMUNIKACIJE , d.o.o. |
| (Slovenia) |
COGENT COMMUNICATIONS ESPAÑA S.L. |
| (Spain) |
COGENT INTERNET SWITZERLAND LLC |
| (Switzerland) |
COGENT COMMUNICATIONS INTERNET SERVICES LLC |
| (Turkey) |
TOV COGENT COMMUNICATIONS UKRAINE |
| (Ukraine) |
COGENT COMMUNICATIONS UK LTD |
| (United Kingdom) |