mozilla/MozStumbler — pull request #1172 by mishari (2014-10-31 12:37:01+00:00)
Title: Added Sierra Wireless OUI to blocklist

It was available in my transport today, looked up the BSSID and found out that it belonged to Sierra Wireless http://www.adminsubnet.net/mac-address-finder/84db2f searches on Google seems to confirm that it's for portable routers.