| 197.231.176.0/21 | Frontier Optical Networks Ltd |  |
| 197.231.176.0/24 | Enterprise Clients | |
| 197.231.177.0/24 | FON HOME USE | |
| 197.231.178.0/24 | FON HOME USE | |
| 197.231.179.0/24 | Mombasa Clients | |
| 197.231.180.0/24 | FON SME'es | |
| 197.231.181.0/24 | FON NBI SME's | |
| 197.231.182.0/24 | Frontier Optical Networks Ltd | |
| 197.231.183.0/24 | FON CORPORATE | |
| 41.79.8.0/22 | Frontier Optical Networks Limited | |
| 41.79.8.0/24 | FON Infrastructure | |
| 41.79.9.0/24 | Broadband Business Clients | |
| 41.79.10.0/24 | Broadband Business Clients | |
| 41.79.11.0/24 | Broadband Home Users | |
