| 38.99.71.0/24 | FIVE9-CGNT-NET-3 | |
| 38.107.71.0/24 | FIVE9-CGNT-NET-2 | |
| 50.220.235.0/24 | CCCH3-4 | |
| 58.69.253.0/24 | IPG | |
| 74.114.192.0/24 | FIVE9 | |
| 74.114.193.0/24 | FIVE9 | |
| 103.169.228.0/24 | FIVE9INC-AP | |
| 103.169.229.0/24 | FIVE9INC-AP | |
| 139.138.108.0/24 | | |
| 147.124.176.0/22 | FIVE9 | |
| 147.124.180.0/22 | FIVE9 | |
| 147.124.184.0/24 | FIVE9 | |
| 147.124.185.0/24 | FIVE9 | |
| 147.124.186.0/24 | FIVE9 | |
| 147.124.187.0/24 | FIVE9 | |
| 147.189.21.0/24 | | |
| 147.189.22.0/23 | | |
| 162.213.152.0/24 | FIVE9 | |
| 162.213.153.0/24 | FIVE9 | |
| 162.213.155.0/24 | FIVE9 | |
| 185.49.234.0/24 | G3NS-CLIENT-FIVE9-INC-UK-LIMITED | |
| 185.111.40.0/24 | UK-FIVE9-20150728 | |
| 185.111.41.0/24 | UK-FIVE9-20150728 | |
| 185.111.42.0/24 | UK-FIVE9-20150728 | |
| 185.111.43.0/24 | UK-FIVE9-20150728 | |
| 198.105.200.0/23 | FIVE9-US | |
| 198.105.200.0/24 | FIVE9-US | |
| 198.105.201.0/24 | FIVE9-US | |
| 198.105.202.0/23 | FIVE9-US | |
| 198.105.202.0/24 | FIVE9-US | |
| 198.105.203.0/24 | FIVE9-US | |
| 198.105.204.0/24 | FIVE9-US | |
| 198.105.205.0/24 | FIVE9-US | |
| 198.105.206.0/24 | FIVE9-US | |
| 198.105.207.0/24 | FIVE9-US | |
| 202.92.194.0/24 | GASTRA-NETWORK | |
| 202.92.195.0/24 | GASTRA-NETWORK | |
| 205.196.0.0/24 | FIVE9 | Five9 Inc., US |
| 208.69.28.0/24 | FIVE9 | |
| 208.69.29.0/24 | FIVE9 | |
| 208.69.31.0/24 | FIVE9 | |
| 209.14.129.0/24 | FIVE9-CGNT-NET-1 | |
| 209.119.33.0/24 | XOXO-209-119-33-0 | |
| 209.119.42.0/24 | XOXO-209-119-42-0 | |
| 212.187.211.0/24 | FIVE-NINE | |