To provide proper communication between the BlackBerry® Internet Service and the email messaging environment, the following Internet Protocol (IP) ranges must be allowed to communicate with the BlackBerry Infrastructure.
Note: The IP ranges listed in the table are in classless interdomain routing (CIDR) notation.
| IP Address | Netmask | CIDR Notation | Range | |
| Start | End | |||
| 206.51.26.0 | 255.255.255.0 | 206.51.26.0/24 | 206.51.26.0 | 206.51.26.255 |
| 193.109.81.0 | 255.255.255.0 | 193.109.81.0/24 | 193.109.81.0 | 193.109.81.255 |
| 204.187.87.0 | 255.255.255.0 | 204.187.87.0/24 | 204.187.87.0 | 204.187.87.255 |
| 206.53.144.0 | 255.255.240.0 | 206.53.144.0/20 | 206.53.144.0 | 206.53.159.255 |
| 216.9.240.0 | 255.255.240.0 | 216.9.240.0/20 | 216.9.240.0 | 216.9.255.255 |
| 67.223.64.0 | 255.255.224.0 | 67.223.64.0/19 | 67.223.64.0 | 67.223.95.255 |
| 93.186.16.0 | 255.255.240.0 | 93.186.16.0/20 | 93.186.16.0 | 93.186.31.255 |
| 68.171.224.0 | 255.255.224.0 | 68.171.224.0/19 | 68.171.224.0 | 68.171.255.255 |
| 74.82.64.0 | 255.255.224.0 | 74.82.64.0/19 | 74.82.64.0 | 74.82.95.255 |
| 173.247.32.0 | 255.255.224.0 | 173.247.32.0/19 | 173.247.32.0 | 173.247.63.255 |
| 178.239.80.0 | 255.255.240.0 | 178.239.80.0/20 | 178.239.80.0 | 178.239.95.255 |
| 180.149.148.0 | 255.255.252.0 | 180.149.148.0/22 | 180.149.148.0 | 180.149.151.255 |
| 180.168.204.0 | 255.255.252.0 | 180.168.204.0/22 | 180.168.204.0 | 180.168.207.255 |
- BlackBerry® Internet Service
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