| Range From | Range To | Organisation |
|---|---|---|
| 81.72.0.0 | 81.72.12.255 |  Telecom Italia SMART-SPEEDWAY |
| 81.72.13.0 | 81.72.18.242 | Telecom Italia S.p.A. E@sy.ip service Wholesale .. |
| 81.72.18.243 | 81.72.18.250 | ITALBULLONI SAS DI C |
| 81.72.18.251 | 81.72.23.255 | Telecom Italia S.p.A. E@sy.ip service Wholesale .. |
| 81.72.24.0 | 81.72.35.255 | Telecom Italia SMART-SPEEDWAY |
| 81.72.36.0 | 81.72.46.255 | Telecom Italia S.p.A. E@sy.ip service Wholesale .. |
| 81.72.47.0 | 81.72.47.7 | PAYTRON SPA |
| 81.72.47.8 | 81.72.47.255 | Telecom Italia S.p.A. E@sy.ip service Wholesale .. |
| 81.72.48.0 | 81.72.53.255 | Telecom Italia SMART-SPEEDWAY |
| 81.72.54.0 | 81.72.54.71 | Telecom Italia S.p.A. |
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