| Uk-Personal Numbers | 4470 | 0.40 |
| Us, Ak-907 (Alaska) | 1907 | 0.09 |
| Us, Virginislands | 1340 | 0.09 |
| Us-Hi-808 (Hawaii) | 1808 | 0.13 |
| Usa | 1 | 0.09 |
| Uganda | 256 | 0.85 |
| Ukraina Cellular | 3809 | 0.28 |
| Ukraine | 380 | 0.18 |
| Ukraine | 38039 | 0.18 |
| Ukraine Mobile "Astelit" | 38093 | 0.28 |
| Ukraine Mobile "Astelit" | 38073 | 0.28 |
| Ukraine Mobile "Astelit" | 38063 | 0.28 |
| Ukraine Mobile "Beeline" | 38068 | 0.28 |
| Ukraine Mobile "Intertelecom" | 38094 | 0.28 |
| Ukraine Mobile "Kiyvstar" | 38096 | 0.28 |
| Ukraine Mobile "Kiyvstar" | 38097 | 0.28 |
| Ukraine Mobile "Kiyvstar" | 38098 | 0.28 |
| Ukraine Mobile "Kiyvstar" | 38067 | 0.28 |
| Ukraine Mobile 3Mob | 38091 | 0.28 |
| Ukraine Mobile Vodafone | 38099 | 0.28 |
| Ukraine Mobile Vodafone | 38066 | 0.28 |
| Ukraine Mobile Vodafone | 38095 | 0.28 |
| Ukraine Mobile Vodafone | 38050 | 0.28 |
| Ukraine-Cellular "Telesystems " | 38092 | 0.28 |
| United Arab Emirates | 971 | 0.30 |
| United Arab Emirates-Cellular | 97150 | 0.30 |
| United Kingdom | 44 | 0.09 |
| United Kingdom-Cellular | 447 | 0.20 |
| United Kingdom-Other Specialized | 448 | 0.40 |
| United Kingdom-Premium | 449 | 0.31 |
| Uruguay | 598 | 0.25 |
| Uruguay-Cellular | 5989 | 0.40 |
| Uzbekistan | 998 | 0.16 |