Potus helo is called now "VH-71A"

The VXX version of the EH-101 received its mission design series designator:

Presidential Helo Is Now ‘VH-71A’
Sun, 17 Jul ’05

Providing POTUS With Mobile Command And Control Capability
Marking a major step in the aggressive transition from concept to fielded capability, the next generation presidential helicopter has shed its generic “VXX” placeholder and received its mission design series designator of “VH-71A.”
A popular name for the VH-71A is still under consideration.
Assignment of MDS designators and popular names is done by the deputy chief of staff of the US Air Force (Plans and Policies), the agency responsible for assigning designators for military aerospace vehicles.
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Sources: ANN.net – Presidential Helo Is Now ‘VH-71A’