The AirPort 4.2 for Mac OS X software supports all models of Apple AirPort base stations including the AirPort Extreme and AirPort Express models.
Internet service provider (ISP) compatibility:
Internet access requires a compatible ISP; fees may apply.
For more information on using AirPort Extreme or AirPort Express with your Internet account, contact your ISP or go to the AppleCare Knowledge Base at: http://www.apple.com/support
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