BlackBerry Internet Service IP Ranges

If you have BlackBerry users and your not using the BlackBerry Enterprise Server (BES or BES Express) to keep those devices synchronized with your Microsoft Exchange, IBM Lotus Domino or Novell GroupWise servers then your users are likely using BlackBerry Internet Service (BIS) and opening up your internal mail system to Research In Motion IP network you’ll need the following IP information from RIM, as of today the following IP networks are assigned to RIM for BIS:

206.51.26.0/24, 193.109.81.0/24, 204.187.87.0/24, 206.53.144.0/20, 216.9.240.0/20, 67.223.64.0/19, 93.186.16.0/20, 68.171.224.0/19

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