Int 21H, AH=44H, AL=0AH

3.1 and higher

CHECK IF HANDLE IS REMOTE

AX = 440Ah
BX = handle

CF clear if successful
    DX = attribute word (as stored in SFT)
	bit 15: set if remote
	bit 14: date/time not set on close
CF set on error
    AX = error code (01h,06h) (see #01680 at AH=59h/BX=0000h)

if file is remote, Novell Advanced NetWare 2.0 returns the number of
  the file server on which the handle is located in CX
DR DOS 3.41 and 5.0 clear all bits of DX except bit 15; Novell DOS 7
  fully supports this function
this function was not supported by Digital Research's DOS Plus

 AX=4400h,AX=4409h,AH=52h,INT 2F/AX=122Bh

Text based on Ralf Brown Interrupt List Release 61