There are cases when mobile network codes are occupied not by mobile carriers, but government structures (military, railway, landline phone authorities), fixed and broadband internet providers, scientific organisations, etc. Some MCCMNCs belong to obsolete legal entities, acquired by other market players or went to bankruptcy, but codes are kept for a certain period for legacy purposes.
| Brand name | CSL |
|---|---|
| Other names | 1O1O, One2Free, New World Mobility, PCCW, SUNDAY, SUNMobile, HKT, Hong Kong Telecom |
| Mobile users | 4 324 000 000 mobile users (report dated 23/11/2024) |
| MCCMNC code | 45400 |
| Mobile network code (MNC) | 00 |
| Mobile country code (MCC) | 454 |
| Other MCCMNCs | 45402, 45416, 45418, 45419, 45420, 45429 |
| Mobile Number Portability (MNP) | Yes |
| Web |
