| Capital Online Yang Qiao Datacenter | CDS Global Cloud Co., LTD | Beijing | China | 1 | 0 |
| Capital Online Zhao Wei Datacenter | CDS Global Cloud Co., LTD | Beijing | China | 2 | 0 |
| Capital Outsourcing Beirut | CAPITAL OUTSOURCING SAL | Beirut | Lebanon | 0 | 0 |
| CapitaLand 9 Tai Seng | CapitaLand Digital Holdings Pte Ltd. | Singapore | Singapore | 0 | 0 |
| Carolina Internet / CaroNet | CaroNet | Charlotte | United States | 0 | 0 |
| Carolina Internet / CaroNet XB | CaroNet | Charlotte | United States | 1 | 0 |
| Carrier Core - Tampa | Carrier Core, LLC | Tampa | United States | 5 | 0 |
| CarrierColo Berlin Kitzing (I/P/B/ site K) | IPB Internet Provider in Berlin GmbH | Berlin | Germany | 15 | 2 |
| CarrierColo Berlin Luetzow (I/P/B/ site B) | IPB Internet Provider in Berlin GmbH | Berlin | Germany | 104 | 5 |
| Carrierswitchraum Jena | Thüringer Netkom GmbH | Jena | Germany | 4 | 0 |
| Casablanca INT s.r.o. | ACTIVE 24, s.r.o. | Prague | Czechia | 5 | 0 |
| Cassin1 | Datacampus SAS | Chasseneuil-du-Poitou | France | 2 | 0 |
| Castle-IT Tours | Caste-IT SAS | Larcay | France | 1 | 0 |
| Caucasus Online Datacenter - Tbilisi | Caucasus Online | Tbilisi | Georgia | 3 | 0 |
| CC IN2P3 | Centre de Calcul de l'Institut National de Physique Nucléaire et de Physique des Particules | Villeurbanne | France | 11 | 1 |
| CCLiberia - Cable landing point Monrovia | Cable Consortium of Liberia | Monrovia | Liberia | 2 | 1 |
| CDC Auckland HV1 | CDC Data Centres | Hobsonville, Auckland | New Zealand | 12 | 1 |
| CDC Auckland SD1 | CDC Data Centres | Silverdale, Auckland | New Zealand | 13 | 1 |
| CDC Canberra FY1 | CDC Data Centres | Fyshwick | Australia | 3 | 0 |
| CDC Canberra FY2 | CDC Data Centres | Fyshwick | Australia | 2 | 0 |
| CDC Canberra HU1 | CDC Data Centres | Hume | Australia | 2 | 0 |
| CDC Canberra HU2 | CDC Data Centres | Hume | Australia | 1 | 0 |
| CDC Canberra HU3 | CDC Data Centres | Hume | Australia | 1 | 0 |
| CDC Canberra HU4 | CDC Data Centres | Hume | Australia | 1 | 0 |
| CDC Canberra HU5 | CDC Data Centres | Hume | Australia | 1 | 0 |
| CDC Melbourne BK1 | CDC Data Centres | Brooklyn | Australia | 1 | 0 |
| CDC Sydney EC1 | CDC Data Centres | Eastern Creek | Australia | 3 | 1 |
| CDC Sydney EC2 | CDC Data Centres | Eastern Creek | Australia | 3 | 1 |
| CDC Sydney EC3 | CDC Data Centres | Eastern Creek | Australia | 4 | 1 |
| CDC Sydney EC4 | CDC Data Centres | Eastern Creek | Australia | 4 | 1 |
| CDC1 - 350 E Cermak Rd | Colocation America Corporation | Chicago | United States | 2 | 0 |
| CDC2 - 600 S Federal st | Colocation America Corporation | Chicago | United States | 1 | 0 |
| CDC3 - 800 E Business Center Dr | Colocation America Corporation | Mount Prospect | United States | 0 | 0 |
| CDC4 - 1808 Swift Dr | Colocation America Corporation | Oak Brook | United States | 2 | 0 |
| CDC5 - 2200 Busse Rd | Colocation America Corporation | Elk Grove Village | United States | 0 | 0 |
| CE Colo DC7 Prague | CE Colo Czech s.r.o. | Prague | Czechia | 5 | 2 |
| CE Colo Prague | CE Colo Czech s.r.o. | Prague | Czechia | 151 | 8 |
| Celeste Fil d’Ariane | Celeste SAS | Albi | France | 1 | 0 |
| Celeste Marilyn | Celeste SAS | Champs-sur-Marne | France | 2 | 0 |
| Cellcom Israel Haifa Data center | Cellcom Israel | Haifa | Israel | 4 | 0 |
| Cellcom Israel Netanya Data center | Cellcom Israel | Netanya | Israel | 4 | 0 |
| Cellcom Israel Rosh Ha'ayin Data center | Cellcom Israel | Rosh Ha'Ayin | Israel | 3 | 0 |
| Cellnex Datacenter Alphen aan den Rijn | Cellnex Netherlands B.V. | Alphen aan den Rijn | Netherlands | 3 | 0 |
| Cellnex Datacenter Amsterdam | Cellnex Netherlands B.V. | Amsterdam | Netherlands | 9 | 0 |
| Cellnex Datacenter Den Haag | Cellnex Netherlands B.V. | The Hague | Netherlands | 3 | 0 |
| Cellnex Datacenter Hilversum | Cellnex Netherlands B.V. | Hilversum | Netherlands | 4 | 0 |
| Cellnex Datacenter Rotterdam | Cellnex Netherlands B.V. | Rotterdam | Netherlands | 2 | 0 |
| CEMO DC | CENTRIC MOBILITY (CEMO), S.R.L | Santiago | Dominican Republic | 11 | 1 |
| center3 DMM1 - Dammam | center3 | Dammam | Saudi Arabia | 2 | 0 |
| center3 DMM2 - Dammam | center3 | Dammam | Saudi Arabia | 3 | 0 |