Steps to do:
1) Go to the code pane: ALT+F11
2) Add new module
3) Copy and paste below code:
Option Explicit
Sub test()
MsgBox GetNamedRange(Workbooks("YourWorkbookName.xls").Worksheets("YourWorksheetName").Range("A2"))
MsgBox GetNamedRange(ActiveCell)
End Sub
Function GetNamedRange(rng As Range) As String
Dim r As Range, n As Name
Dim wsh As Worksheet, wbk As Workbook
Dim sRetVal As String
On Error Resume Next
Set wsh = rng.Parent
Set wbk = wsh.Parent
For Each n In wbk.Names
r = n.RefersTo
If r.Address = rng.CurrentRegion.Address Then
sRetVal = n.NameLocal
Exit For
End If
Next
GetNamedRange = sRetVal
End Function
4) Test it