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