The ITRS Combination Centres are responsible for providing ITRF products by combining inputs from the Technique Centres and other contributors. These products are provided to the ITRS Center.

The ITRS Combination Centres are currently maintained by the following institutions:

• Deutsches Geodätisches Forschungsinstitut (DGFI-TUM)
• Institut National de l’Information Géographique et Forestière (IGN)
• Jet Propulsion Laboratory (JPL)