Telefónica O2 Slovakia
- Rank in Country: 06
- Operator: Telefónica O2 Slovakia
- Type: National
- Technology: GSM 900 / GSM 1800 / UMTS 2100 / LTE 800 / LTE 1800 / TD-LTE 3500 / TD-LTE 3700
- Ownership: O2
- MCC:231
- MNC: 06
- Status: Operational
- Description:
| Name | O2 |
|---|---|
| Company | Telefonica O2 Slovakia |
| Country |  Slovakia |
| Country ISO | SK |
| Country code | + 421 |
| Carrier website | https://www.o2.sk/ |
| Carrier codes |
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| Mobile prefix | 940, 944, 948, 949 |
| Size of NSN | 9 |
| Number format | +421 940 xxx xxx +421 944 xxx xxx +421 948 xxx xxx +421 949 xxx xxx more... |
| Coverage map | Check O2 Coverage |
| Subscribers | 1 986 000 (June 2018) |
| GSM bands |
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| GSM protocols |
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| UMTS bands |
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| UMTS protocols |
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| LTE bands |
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| LTE protocols |
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