Call Centers in South Korea
| Nr | Company name | Location | Employees | Turnover |
| 1 | Ktcs | Daejeon, South Korea | 5,001 – 10,000 | $781.9M |
| 2 | Hyosung ITX | Yeongdeungpo-gu, South Korea | 5,001 – 10,000 | $365M |
| 3 | Sejong Telecom | Seoul, South Korea | 201 – 500 | $219M |
| 4 | Sk Telecom | 51 – 200 | $69.5M | |
| 5 | ECS Telecom | Seoul, South Korea | 51 – 200 | $65.2M |
| 6 | eGios | Seoul, South Korea | 11 – 50 | $7.9M |
| 7 | Hanil Telecom | Daegu, South Korea | 11 – 50 | $5.7M |
| 8 | SUNGHWA TELECOMMUNICATIONS | 11 – 50 | $5.2M | |
| 9 | CPS Telecom | Seoul, South Korea | 11 – 50 | $4.5M |
| 10 | Seoul Electronics & Telecom | 11 – 50 | $3.5M | |
| 11 | Telcom | 11 – 50 | $2.8M | |
| 12 | C&B Solution | 11 – 50 | $2.7M | |
| 13 | Woo Joo Telecom | Seoul, South Korea | 1 – 10 | $1.4M |
| 14 | Telecoms Korea | 1 – 10 | $1.3M | |
| 15 | Daesung Telecom | Seoul, South Korea | 1 – 10 | $1M |
| 16 | Samhwa Telecom | Seoul, South Korea | 1 – 10 | $202,000 |
| 17 | Naray Telecom | Seoul, South Korea | 1 – 10 | $200,000 |
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Geographic relevance: United States and international markets.