| Carolina Internet / CaroNet | CaroNet |  Charlotte | — | — | — | PeeringDB |
| Carrier Services Group | — | Boardman | — | — | — | OSM |
| Cellnex | — |  Netherlands | — | — | — | OSM |
| Center for Computation & Technology (CCT) | — | United States | — | — | — | OSM |
| Centeris | Centeris | United States | — | — | — | OSM |
| Centeris SH1 Colocation | — | Puyallup | — | — | — | OSM |
| Centeris SH2 Build-to-Suit | — | Puyallup | — | — | — | OSM |
| Centerprise International (Distribution) | Centerprise International |  Ystrad Mynach | — | — | — | OSM |
| Centerprise International Newport | Centerprise Cloud | Newport | — | — | — | OSM |
| Centersquare Lynnwood SE1 | Csquare | Lynnwood | — | — | — | OSM |
| Centersquare Silicon Valley (SFO4-A) | Csquare | Santa Clara | — | — | — | PeeringDB |
| Central CANTV | CANTV |  Barcelona | — | — | — | OSM |
| Central CANTV | CANTV | Venezuela | — | — | — | OSM |
| Central Computer Lab | Malda College |  India | — | — | — | OSM |
| Central de Digitel | Digitel | Venezuela | — | — | — | OSM |
| Central de Transmisiones | — |  Providencia | — | — | — | OSM |
| Central de internet - Claro/NET | Claro S/A |  Brazil | — | — | — | OSM |
| Central telefônica da Vivo | VIVO SA | Itapetininga | — | — | — | OSM |
| Central telefônica de Itapetininga | Vivo | Brazil | — | — | — | OSM |
| Centrale TIM Trento Nord | TIM |  Italy | — | — | — | OSM |
| Centre Régional de Ressources Informatiques (CRRI) | Université Clermont Auvergne |  France | — | — | — | OSM |
| Centre de Calcul de l’Université de Bourgogne | Centre de Calcul de l’Université de Bourgogne | Dijon | — | — | — | OSM |
| Centre de Processament de Dades IBM | — |  Spain | — | — | — | OSM |
| Centre de données d'Hydro-Québec | Hydro-Québec |  Drummondville | — | — | — | OSM |
| CentriLogic Arlington (ARL) | Centrilogic | Bracknell | — | — | — | PeeringDB |
| Centrinuity Toulouse | Centrinuity Toulouse | Toulouse Balma | — | — | — | PeeringDB |
| Centro Control de Energía | — |  Mexico | — | — | — | OSM |
| Centro Elab. Dati Catocci Bianciardi | Bari Bianciardi Vanni | Siena | — | — | — | OSM |
| Centro Nacional de Registros | — |  El Salvador | — | — | — | OSM |
| Centro de Computación | university | Venezuela | — | — | — | OSM |
| Centro de Cómputo | — |  Costa Rica | — | — | — | OSM |
| Centro de Datos - Banco Nacional | Banco Nacional | Costa Rica | — | — | — | OSM |
| Centro de Datos - CNT | — |  Ecuador | — | — | — | OSM |
| Centro de Datos Modular REFSA Telecomunicaciones | — |  Argentina | — | — | — | OSM |
| Centro de Datos UPSTI | — | Argentina | — | — | — | OSM |
| Centro de Datos Win Santa Catalina | Win |  Lima | — | — | — | OSM |
| Centro de Dirigentes Lojistas de Campos dos Goytacazes - CDL | CDL | Brazil | — | — | — | OSM |
| Centro de Entrenamiento Tecnológico | UNMSM - Huawei | Peru | — | — | — | OSM |
| Centro de Gestão do Conhecimento Organizacional | UFJF | Brazil | — | — | — | OSM |
| Centro de Informática (CPD) | — | Brazil | — | — | — | OSM |
| Centro de Procesamiento de Datos Norte | Banco Santander | Spain | — | — | — | OSM |
| Centro de Procesamiento de Datos Sur | Banco Santander | Spain | — | — | — | OSM |
| Centro de Procesamiento de Datos del Gobierno de Cantabria | Gobienro de Cantabria | Santander | — | — | — | OSM |
| Centro de Processamento de Dados - UEFS | Universidade Estadual de Feira de Santana | Brazil | — | — | — | OSM |
| Centro de datos Ascenty Querétaro 1 | Ascenty | Mexico | — | — | — | OSM |
| Centro de datos Ascenty Querétaro 2 | Ascenty | Mexico | — | — | — | OSM |
| Centro de datos Bleeding Edge QRO1 | Bleeding Edge | Mexico | — | — | — | OSM |
| Centro de datos Equinix MO1 | Equinix | Mexico | — | — | — | OSM |
| Centro de datos KIO MEX1 | — | Mexico | — | — | — | OSM |
| Centro de datos KIO MEX5 | KIO | Mexico | — | — | — | OSM |
| Centro de datos KIO MEX6 | KIO | Mexico | — | — | — | OSM |
| Centro de datos KIO QRO1 y QRO2 | KIO | Mexico | — | — | — | OSM |
| Centro de datos NextStream MEXIX01 | Nextstream | Mexico | — | — | — | OSM |
| Centro de datos Scala SMEXTP01 | Scala | Mexico | — | — | — | OSM |
| Centro de datos Terranova | — | Mexico | — | — | — | OSM |
| Centrum Przetwarzania Danych T‑Mobile Polska | T‑Mobile Polska |  Poland | — | — | — | OSM |
| Centrum Technologii ICM UW | Centrum Technologii ICM UW | Warszawa | — | — | — | OSM |
| Centrum výpočtovej techniky FHPV PU | — |  Slovakia | — | — | — | OSM |
| CenturyLink | Lumen Technologies | United States | — | — | — | OSM |
| CenturyLink | — | United States | — | — | — | OSM |
| CenturyLink | CenturyLink | United States | — | — | — | OSM |
| CenturyLink | — | United States | — | — | — | OSM |
| CenturyLink | CenturyLink | United States | — | — | — | OSM |
| Centurylink | Centurylink | United States | — | — | — | OSM |
| Cenuta Denizli | cenuta.com |  Denizli | — | — | — | PeeringDB |
| Charles Schwab Data Center | — | United States | — | — | — | OSM |
| Chayora Tianjin China(CN) | 朝亚 Chayora |  Tianjin | — | — | — | PeeringDB |
| Chayya computers works | — | India | — | — | — | OSM |
| Cherokee Data Center | — | Tulsa | — | — | — | OSM |
| Chick-fil-A Hiring Center | Dennis Sampier | United States | — | — | — | OSM |
| China Mobile International - Data Zone Data Center (Thailand) | CMI China Mobile International Limited |  Chonburi | — | — | — | PeeringDB |
| Chittagong Online Limited (COLBD) | Chittagong Online |  Chittagong | — | — | — | PeeringDB |
| Choctaw Nation of Oklahoma Data Center | Choctaw Nation of oklahoma | Durant | — | — | — | OSM |
| Choice2mobile Technology Ltd | De Choicetech Integrated Ltd |  Lagos | — | — | — | PeeringDB |
| Chorus | Chorus |  New Zealand | — | — | — | OSM |
| Chorus Johnsonville Exchange (JV) | Chorus | Wellington | — | — | — | PeeringDB |
| Chorus Linwood Exchange (LIN) | Chorus | Christchurch | — | — | — | PeeringDB |
| Chorus Lynmore Exchange (LYE) | Chorus | Rotorua District | — | — | — | PeeringDB |
| Chorus Mangere Exchange (MRE) | Chorus | Manukau City | — | — | — | PeeringDB |
| Chorus Marewa Exchange (MAW) | Chorus | Napier City | — | — | — | PeeringDB |
| Chorus Massey Exchange (MSY) | Chorus | Waitakere City | — | — | — | PeeringDB |
| Chorus North East Valley Exchange (NVY) | Chorus | Dunedin City | — | — | — | PeeringDB |
| Chorus Porirua Exchange (PRO) | Chorus | Porirua City | — | — | — | PeeringDB |
| Chorus Spotswood Exchange (SWO) | Chorus | New Plymouth District | — | — | — | PeeringDB |
| Chorus Stoke Exchange (STK) | Chorus | Nelson City | — | — | — | PeeringDB |
| Chorus Waikiwi Exchange (WKW) | Chorus | Invercargill City | — | — | — | PeeringDB |
| Chorus Whangarei Exchange (WR) | Chorus | Whangarei District | — | — | — | PeeringDB |
| Cibicom Datacenter Aarhus North | Cibicom A/S |  Hinnerup | — | — | — | PeeringDB |
| Cibicom Taulov | Cibicom A/S | Fredericia | — | — | — | PeeringDB |
| Cincinnatti Bell - West 7th Street | Cincinnatti Bell | Cincinnati | — | — | — | PeeringDB |
| Cirion Centro de Datos LIM2 | — | Peru | — | — | — | OSM |
| Cirion Mendoza - MEN1 | Cirion Technologies | Godoy Cruz | — | — | 1 | PeeringDB |
| Cirion Technologies | Cirion Technologies | Argentina | — | — | — | OSM |
| Cisco Allen | — | United States | — | — | — | OSM |
| Citibank Riverdale Data Centre | — | London | — | — | — | OSM |
| City Online Servces Ltd , Visakhapatnam | City Online Services | Viskhapatnam | — | — | — | PeeringDB |
| CityFibre Cabinets | CityFibre | United Kingdom | — | — | — | OSM |
| Citynet Facility | Citynet Marcin Sobala, Piotr Misiuda | Rzeszów | — | — | — | PeeringDB |
| Civicos Networking - IAAS (MADRID) | Civicos Networking | Madrid | — | — | — | PeeringDB |
| Civicos Networking DCROUBAIX | Civicos Networking | Roubaix | — | — | — | PeeringDB |