IP5

IP5 may refer to:

Internet Stream Protocol, a derivative of IPv5 and intended successor to IPv4, currently being replaced by IPv6
Inositol pentakisphosphate, a molecule derived from inositol tetrakisphosphate
Itinerários Principais (Principal Routes) 5, a road in Portugal
"Intersection Point IP5", co-located with TOTEM at the Large Hadron Collider at CERN
IP5 (intellectual property offices), the five largest intellectual property offices in the world
Fifth-order intercept point, a measure of linearity in amplifiers and mixers