The Ubiquiti airOS v5.5.6 firmware for XW hardware is a legacy release primarily used for older airMAX devices like the Rocket M5, NanoStation M5, and NanoBeam. Because it is an older version, it is no longer prominently featured on the official Ubiquiti downloads page. Download and Official Sources
Official Downloads Page: You can search for legacy versions on the Ubiquiti Software Downloads portal by selecting the specific product and looking for "See past firmware".
Release Announcement: The original release was documented on the Ubiquiti Community Forum. Ubnt Firmware Xw.v5.5.6 Download
Legacy Mirrors: Some third-party repositories and community members maintain mirrors of older files, such as PilsFree's UBNT Mirror, though official sources are always recommended for security. Key Technical Considerations
Firmware 5.6.4 Download request [Solved] - Ubiquiti Community The Ubiquiti airOS v5
Ubiquiti’s Direct EU/US CDN (still active)
https://dl.ui.com/firmwares/
However, direct navigation is restricted. Use the exact path:
https://dl.ui.com/firmwares/XW/XW.v5.5.6.bin Official Sources (Recommended)
Always verify MD5 checksum after download.
Ubiquiti Community Firmware Archive
community.ui.comUbiquiti has removed many legacy firmware files from its main download portal to encourage upgrades to newer OS versions. However, the company still hosts historical images on its community archives.