| RADIOKONTAKT OPERÁTOR a.s. | Z-17 |
| RCD RADIOKOMUNIKACE s.r.o. | Z-I-120 |
| REFLEX SOFTWARE spol. s r.o. | C-II-228 |
| REPRO INTERNATIONAL s.r.o. | A2-64 |
| RITTAL WERK RUDOLF LOH GmbH & Co. KG | Z-I-104 |
| RKK INFORMATIONSSYSTEME, s.r.o. | E-I-C/116 |
| RKK INFORMATIONSSYSTEME, s.r.o. | P-17 |
| ROBERT BOSCH, ODBYTOVÁ s.r.o. - DIVIZE BOSCH TELECOM | Z-48 |
| ROCC COMPUTERS spol. s r.o. | B-3 |
| ROHDE & SCHWARZ - PRAHA, s.r.o. | Z-18 |
| RON SOFTWARE spol. s r.o. | E-I-B/109 |
| ROYAL OFFICE & TELECOM s.r.o. | D-I-104 |
| RWTÜV PRAHA, spol. s r.o. | K-kanc. 29-32 |
| SAMSUNG ELECTRONICS Co. Ltd. | B-36 |
| SAP2000 spol. s r.o. PÍSEK | F-014b |