diff --git a/lib/77bit/g2 b/lib/77bit/g2
index d0f2027ee..1e2a4334f 100644
--- a/lib/77bit/g2
+++ b/lib/77bit/g2
@@ -2,4 +2,5 @@ gfortran -c ../packjt.f90
 gfortran -o encode77 -fbounds-check -Wall -Wno-conversion -Wno-real-q-constant \
 	 encode77.f90 ../deg2grid.f90 ../grid2deg.f90 ../fix_contest_msg.f90 \
 	 ../to_contest_msg.f90 ../fmtmsg.f90 ../azdist.f90 ../geodist.f90 \
-	 ihashcall.f90 hash10.f90 hash12.f90 hash22.f90 packjt.o
+	 ihashcall.f90 hash10.f90 hash12.f90 hash22.f90 save_hash_call.f90 \
+	 packjt.o
diff --git a/lib/77bit/g8 b/lib/77bit/g8
index 2161c2bfb..2258817d3 100644
--- a/lib/77bit/g8
+++ b/lib/77bit/g8
@@ -1,2 +1,2 @@
 gfortran -o test28 -fbounds-check -Wall -Wno-conversion test28.f90 pack28.f90 \
-	 unpack28.f90 ihashcall.f90 hash22.f90
+	 unpack28.f90 ihashcall.f90 hash22.f90 save_hash_call.f90
diff --git a/lib/77bit/hash10.f90 b/lib/77bit/hash10.f90
index 916e777c5..1b6f03930 100644
--- a/lib/77bit/hash10.f90
+++ b/lib/77bit/hash10.f90
@@ -1,34 +1,18 @@
-subroutine hash10(n10,c13,isave)
+subroutine hash10(n10,c13)
 
-  parameter (NMAX=20)
-  character*13 c13,callsign(NMAX)
-  integer ihash(NMAX)
-  logical first
-  data first/.true./
-  save first,ihash,callsign
-
-  if(first) then
-     ihash=-1
-     callsign='             '
-     first=.false.
-  endif
-
-  if(isave.ge.0) then
-     do i=1,NMAX
-        if(ihash(i).eq.n10) go to 900             !This one is already in the list
-     enddo
-     ihash(NMAX:2:-1)=ihash(NMAX-1:1:-1)
-     callsign(NMAX:2:-1)=callsign(NMAX-1:1:-1)
-     ihash(1)=n10
-     callsign(1)=c13
-  else
-     do i=1,NMAX
-        if(ihash(i).eq.n10) then
-           c13=callsign(i)
-           go to 900
-        endif
-     enddo
-  endif
+  parameter (MAXHASH=20)
+  character*13 c13,callsign(MAXHASH)
+  integer ihash10(MAXHASH),ihash12(MAXHASH),ihash22(MAXHASH)
+  common/hashcom/ihash10,ihash12,ihash22,callsign
+  save /hashcom/
+  
+  c13='<...>'
+  do i=1,MAXHASH
+     if(ihash10(i).eq.n10) then
+        c13=callsign(i)
+        go to 900
+     endif
+  enddo
 
 900 return
 end subroutine hash10
diff --git a/lib/77bit/hash12.f90 b/lib/77bit/hash12.f90
index cd20b8485..1c474424a 100644
--- a/lib/77bit/hash12.f90
+++ b/lib/77bit/hash12.f90
@@ -1,34 +1,19 @@
-subroutine hash12(n12,c13,isave)
+subroutine hash12(n12,c13)
 
-  parameter (NMAX=20)
-  character*13 c13,callsign(NMAX)
-  integer ihash(NMAX)
-  logical first
-  data first/.true./
-  save first,ihash,callsign
+  parameter (MAXHASH=20)
+  character*13 c13,callsign(MAXHASH)
+  integer ihash10(MAXHASH),ihash12(MAXHASH),ihash22(MAXHASH)
+  common/hashcom/ihash10,ihash12,ihash22,callsign
+  save /hashcom/
+  
+  c13='<...>'
+  do i=1,MAXHASH
+     if(ihash12(i).eq.n12) then
+        c13=callsign(i)
+        go to 900
+     endif
+  enddo
 
-  if(first) then
-     ihash=-1
-     callsign='             '
-     first=.false.
-  endif
-
-  if(isave.ge.0) then
-     do i=1,NMAX
-        if(ihash(i).eq.n12) go to 900             !This one is already in the list
-     enddo
-     ihash(NMAX:2:-1)=ihash(NMAX-1:1:-1)
-     callsign(NMAX:2:-1)=callsign(NMAX-1:1:-1)
-     ihash(1)=n12
-     callsign(1)=c13
-  else
-     do i=1,NMAX
-        if(ihash(i).eq.n12) then
-           c13=callsign(i)
-           go to 900
-        endif
-     enddo
-  endif
 
 900 return
 end subroutine hash12
diff --git a/lib/77bit/hash22.f90 b/lib/77bit/hash22.f90
index 596572439..b1fdbc5c4 100644
--- a/lib/77bit/hash22.f90
+++ b/lib/77bit/hash22.f90
@@ -1,35 +1,18 @@
-subroutine hash22(n22,c13,isave)
+subroutine hash22(n22,c13)
 
-  parameter (NMAX=22)
-  character*13 c13,callsign(NMAX)
-  integer ihash(NMAX)
-  logical first
-  data first/.true./
-  save first,ihash,callsign
-
-  if(first) then
-     ihash=-1
-     callsign='             '
-     first=.false.
-  endif
-
-  if(isave.ge.0) then
-     do i=1,NMAX
-        if(ihash(i).eq.n22) go to 900         !This one is already in the list
-     enddo
-     ihash(NMAX:2:-1)=ihash(NMAX-1:1:-1)
-     callsign(NMAX:2:-1)=callsign(NMAX-1:1:-1)
-     ihash(1)=n22
-     callsign(1)=c13
-  else
-     c13='<...>'
-     do i=1,NMAX
-        if(ihash(i).eq.n22) then
-           c13=callsign(i)
-           go to 900
-        endif
-     enddo
-  endif
+  parameter (MAXHASH=20)
+  character*13 c13,callsign(MAXHASH)
+  integer ihash10(MAXHASH),ihash12(MAXHASH),ihash22(MAXHASH)
+  common/hashcom/ihash10,ihash12,ihash22,callsign
+  save /hashcom/
+  
+  c13='<...>'
+  do i=1,MAXHASH
+     if(ihash22(i).eq.n22) then
+        c13=callsign(i)
+        go to 900
+     endif
+  enddo
 
 900 return
 end subroutine hash22
diff --git a/lib/77bit/pack28.f90 b/lib/77bit/pack28.f90
index 7a87fea1d..2184ba5f4 100644
--- a/lib/77bit/pack28.f90
+++ b/lib/77bit/pack28.f90
@@ -78,8 +78,7 @@ subroutine pack28(c13,n28)
   endif
 ! Check for <...> callsign
   if(c13(1:1).eq.'<')then
-     n22=ihashcall(c13,22)
-     call hash22(n22,c13,1)     !Save (key,value) in hash table
+     call save_hash_call(c13,n10,n12,n22)   !Save callsign in hash table
      n28=NTOKENS + n22
      go to 900
   endif
@@ -104,8 +103,7 @@ subroutine pack28(c13,n28)
   if(iarea.lt.2 .or. iarea.gt.3 .or. nplet.eq.0 .or.       &
        npdig.ge.iarea-1 .or. nslet.gt.3) then
 ! Treat this as a nonstandard callsign: compute its 22-bit hash
-     n22=ihashcall(c13,22)
-     call hash22(n22,c13,1)     !Save (key,value) in hash table
+     call save_hash_call(c13,n10,n12,n22)   !Save callsign in hash table
      n28=NTOKENS + n22
      go to 900
   endif
diff --git a/lib/77bit/pack77_01.f90 b/lib/77bit/pack77_01.f90
index 334f80f65..0a90d5c73 100644
--- a/lib/77bit/pack77_01.f90
+++ b/lib/77bit/pack77_01.f90
@@ -3,11 +3,10 @@ subroutine pack77_01(nwords,w,i3,n3,c77)
 ! Pack a Type 0.1 message: DXpedition mode
 ! Example message:  "K1ABC RR73; W9XYZ <KH1/KH7Z> -11"   28 28 10 5
 
-  character*13 w(19),chash(20)
+  character*13 w(19)
   character*77 c77
   character*6 bcall_1,bcall_2
   logical ok1,ok2
-  common/hashcom/ihash10(20),chash
 
   if(nwords.ne.5) go to 900                !Must have 5 words
   if(trim(w(2)).ne.'RR73;') go to 900      !2nd word must be "RR73;"
@@ -29,8 +28,7 @@ subroutine pack77_01(nwords,w,i3,n3,c77)
   n3=1
   call pack28(w(1),n28a)
   call pack28(w(3),n28b)
-  n10=ihashcall(w(4),10)                !Get the 10-bit hash code
-  call hash10(n10,w(4),0)               !Save this hash and its callsign
+  call save_hash_call(w(4),n10,n12,n22)
   write(c77,1010) n28a,n28b,n10,n5,n3,i3
 1010 format(2b28.28,b10.10,b5.5,2b3.3)
   
diff --git a/lib/77bit/pack77_4.f90 b/lib/77bit/pack77_4.f90
index 0f8833bd8..62d3d1d2b 100644
--- a/lib/77bit/pack77_4.f90
+++ b/lib/77bit/pack77_4.f90
@@ -30,19 +30,14 @@ subroutine pack77_4(nwords,w,i3,n3,c77)
         iflip=0
         n12=0
         c11=adjustr(call_2(1:11))
-        n10=ihashcall(w(2),10)
-        call hash10(n10,w(2),0)             !Save this hash10 and its callsign
-        n12=ihashcall(w(2),12)
-        call hash12(n12,w(2),0)             !Save this hash12 and its callsign
+        call save_hash_call(w(2),n10,n12,n22)
      else if(w(1)(1:1).eq.'<') then
         iflip=0
-        n12=ihashcall(w(1),12)
-        call hash12(n12,w(1),0)               !Save this hash and its callsign
+        call save_hash_call(w(1),n10,n12,n22)
         c11=adjustr(call_2(1:11))
      else if(w(2)(1:1).eq.'<') then
         iflip=1
-        n12=ihashcall(w(2),12)
-        call hash12(n12,w(2),0)               !Save this hash and its callsign
+        call save_hash_call(w(2),n10,n12,n22)
         c11=adjustr(call_1(1:11))
      endif
      n58=0
diff --git a/lib/77bit/packjt77.f90 b/lib/77bit/packjt77.f90
index 839d0d7b8..9f1f7c84a 100644
--- a/lib/77bit/packjt77.f90
+++ b/lib/77bit/packjt77.f90
@@ -2,6 +2,7 @@ include 'hash10.f90'
 include 'hash12.f90'
 include 'hash22.f90'
 include 'ihashcall.f90'
+include 'save_hash_call.f90'
 include 'pack77.f90'
 include 'unpack77.f90'
 include 'pack28.f90'
diff --git a/lib/77bit/save_hash_call.f90 b/lib/77bit/save_hash_call.f90
new file mode 100644
index 000000000..c8250faf6
--- /dev/null
+++ b/lib/77bit/save_hash_call.f90
@@ -0,0 +1,39 @@
+subroutine save_hash_call(c13,n10,n12,n22)
+
+  parameter (MAXHASH=20)
+  character*13 c13,callsign(MAXHASH)
+  integer ihash10(MAXHASH),ihash12(MAXHASH),ihash22(MAXHASH)
+  logical first
+  common/hashcom/ihash10,ihash12,ihash22,callsign
+  save first,/hashcom/
+
+  
+  if(first) then
+     ihash10=-1
+     ihash12=-1
+     ihash22=-1
+     callsign='             '
+     first=.false.
+  endif
+
+  n10=ihashcall(c13,10)
+  n12=ihashcall(c13,12)
+  n22=ihashcall(c13,22)
+  do i=1,MAXHASH
+     if(ihash22(i).eq.n22) go to 900     !This one is already in the table
+  enddo
+
+! New entry: move table down, making room for new one at the top
+  ihash10(MAXHASH:2:-1)=ihash10(MAXHASH-1:1:-1)
+  ihash12(MAXHASH:2:-1)=ihash12(MAXHASH-1:1:-1)
+  ihash22(MAXHASH:2:-1)=ihash22(MAXHASH-1:1:-1)
+
+! Add the new entry
+  callsign(MAXHASH:2:-1)=callsign(MAXHASH-1:1:-1)
+  ihash10(1)=n10
+  ihash12(1)=n12
+  ihash22(1)=n22
+  callsign(1)=c13
+
+900 return
+end subroutine save_hash_call
diff --git a/lib/77bit/unpack77.f90 b/lib/77bit/unpack77.f90
index f6c4386a8..cd905ba8c 100644
--- a/lib/77bit/unpack77.f90
+++ b/lib/77bit/unpack77.f90
@@ -54,7 +54,7 @@ subroutine unpack77(c77,msg)
      if(irpt.ge.0) crpt(1:1)='+'
      call unpack28(n28a,call_1)
      call unpack28(n28b,call_2)
-     call hash10(n10,call_3,-1)
+     call hash10(n10,call_3)
      if(call_3(1:1).eq.'<') then
         msg=trim(call_1)//' RR73; '//trim(call_2)//' '//trim(call_3)//  &
              ' '//crpt
@@ -213,7 +213,7 @@ subroutine unpack77(c77,msg)
         c11(i:i)=c(j:j)
         n58=n58/38
      enddo
-     call hash12(n12,call_3,-1)
+     call hash12(n12,call_3)
      if(iflip.eq.0) then
         call_1=call_3
         call_2=adjustl(c11)//'  '