http://www.techtimes.com/articles/49360/20150428/nasa-may-have-accidentally-discovered-faster-than-light-travel.htm
There are three cases obvious from my research work.
Case1
Virtual mass part of dark matter can be accelerated to faster than speed of light upto 500000km/s. Spacetime expansion rate, Quantum entanglement communication speed and the speed of the wave propounded by Nikola Tesla belong to this category.
Case2
Particles of mass greater than 1kg,cosmic speed is one-third the speed of light. This is the real world scenario.The fastest spinning object in the Universe,which is 50 billion times massive than the sun,does at a rate exactly one-third the speed of light.
Case3
Particles less than 1kg,subatomic particles like protons can be accelerated upto almost c m/s. For instance,protons in CERN achieved this speed.
http://www.techtimes.com/articles/49360/20150428/nasa-may-have-accidentally-discovered-faster-than-light-travel.htm