diff --git a/display.F90 b/display.F90
index 1a4f08be9..9f0cd99fa 100644
--- a/display.F90
+++ b/display.F90
@@ -1,4 +1,4 @@
-subroutine display(nkeep)
+subroutine display(nkeep,ncsmin)
 
 #ifdef Win32
   use dfport
@@ -133,9 +133,13 @@ subroutine display(nkeep)
         i2=index(callsign,' ')
         if(i2.gt.1) callsign(i2:)='      '
         if(callsign.ne.'      ' .and. callsign.ne.callsign0) then
-           nc=nc+1
-           freqcall(nc)=cfreq0//' '//callsign//line3(k)(80:81)
-           callsign0=callsign
+           len=i2-1
+           if(len.lt.0) len=6
+           if(len.ge.ncsmin) then                        !Omit short "callsigns"
+              nc=nc+1
+              freqcall(nc)=cfreq0//' '//callsign//line3(k)(80:81)
+              callsign0=callsign
+           endif
         endif
         if(callsign.ne.'      ' .and. callsign.eq.callsign0) then
            freqcall(nc)=cfreq0//' '//callsign//line3(k)(80:81)
diff --git a/gcom2.f90 b/gcom2.f90
index cca48f663..cb936fc28 100644
--- a/gcom2.f90
+++ b/gcom2.f90
@@ -34,6 +34,7 @@ integer minsigdb       !Decoder threshold setting               GUI
 integer nclearave      !Set to 1 to clear JT65 avg         GUI,Decoder
 integer nfreeze        !Is Freeze checked?                      GUI
 integer nafc           !Is AFC checked?                         GUI
+integer ncsmin         !Minimum length of callsign in bandmap   GUI
 integer newspec        !New spectra in ss(4,322,NSMAX)     GUI,Decoder
 integer nfa            !Low end of map65 search (def 100 kHz)   GUI
 integer nfb            !High end of map65 search (def 160 kHz)  GUI
@@ -101,7 +102,7 @@ common/gcom2/ps0(431),psavg(450),s2(64,3100),ccf(-5:540),                   &
      ndecoding,ndecoding0,mousebutton,                                      &
      ndecdone,npingtime,ierr,lauto,mantx,nrestart,ntr,nmsg,nsave,nadd5,     &
      dftolerance,LDecoded,rxdone,monitoring,nzap,minsigdb,                  &
-     nclearave,nfreeze,nafc,newspec,nfa,nfb,nfcal,idphi,nkeep,              &
+     nclearave,nfreeze,nafc,ncsmin,newspec,nfa,nfb,nfcal,idphi,nkeep,       &
      nmode,mode65,nclip,ndebug,ndphi,                                       &
      nblank,nport,mousedf,mousefqso,neme,nrw26,naggressive,ntx2,nagain,     &
      shok,sendingsh,d2a(661500),d2b(661500),b(60000),jza,jzb,ntime,         &
diff --git a/map65.py b/map65.py
index f32dc53cb..1c06eb2d0 100644
--- a/map65.py
+++ b/map65.py
@@ -1760,7 +1760,7 @@ Audio.ftn_init()
 GenStdMsgs()
 Audio.gcom4.addpfx=(options.addpfx.get().lstrip()+'        ')[:8]
 Audio.gcom2.mousefqso=125
-# stopmon()
+Audio.gcom2.ncsmin=4
 monitor()
 first=1
 if g.Win32: root.iconbitmap("wsjt.ico")
diff --git a/map65a.F90 b/map65a.F90
index f4d81fbfe..e817cdebf 100644
--- a/map65a.F90
+++ b/map65a.F90
@@ -336,7 +336,7 @@ subroutine map65a(newdat)
   write(26,1015) nutc
 1015 format(39x,i4.4)
   call flushqqq(26)
-  call display(nkeep)
+  call display(nkeep,ncsmin)
   ndecdone=2
 
   if(nsave.gt.0 .and. ndiskdat.eq.0) call savetf2(id(1,1,kbuf),nsave,   &