diff --git a/anki/consts.py b/anki/consts.py
index f77ef872f..642686c4c 100644
--- a/anki/consts.py
+++ b/anki/consts.py
@@ -50,8 +50,7 @@ STARTING_FACTOR = 2500
 SCHEMA_VERSION = 11
 SYNC_ZIP_SIZE = int(2.5*1024*1024)
 SYNC_ZIP_COUNT = 25
-SYNC_BASE = "https://sync.ankiweb.net/"
-SYNC_MEDIA_BASE = "https://sync.ankiweb.net/msync/"
+SYNC_BASE = "https://sync%s.ankiweb.net/"
 SYNC_VER = 9
 
 HELP_SITE="http://ankisrs.net/docs/manual.html"
diff --git a/anki/sync.py b/anki/sync.py
index 9c92b0b59..b585f5bc2 100644
--- a/anki/sync.py
+++ b/anki/sync.py
@@ -55,6 +55,7 @@ class Syncer:
         self.rmod = meta['mod']
         self.maxUsn = meta['usn']
         self.uname = meta.get("uname", "")
+        self.hostNum = meta.get("hostNum")
         meta = self.meta()
         self.col.log("lmeta", meta)
         self.lmod = meta['mod']
@@ -472,11 +473,20 @@ class _MonitoringFile(io.BufferedReader):
 
 class HttpSyncer:
 
-    def __init__(self, hkey=None, client=None):
+    def __init__(self, hkey=None, client=None, hostNum=None):
         self.hkey = hkey
         self.skey = checksum(str(random.random()))[:8]
         self.client = client or AnkiRequestsClient()
         self.postVars = {}
+        self.hostNum = hostNum
+        self.prefix = "sync/"
+
+    def syncURL(self):
+        if devMode:
+            url = "https://l1sync.ankiweb.net/"
+        else:
+            url = SYNC_BASE % (self.hostNum or "")
+        return url + self.prefix
 
     def assertOk(self, resp):
         # not using raise_for_status() as aqt expects this error msg
@@ -552,13 +562,8 @@ Content-Type: application/octet-stream\r\n\r\n""")
 
 class RemoteServer(HttpSyncer):
 
-    def __init__(self, hkey):
-        HttpSyncer.__init__(self, hkey)
-
-    def syncURL(self):
-        if devMode:
-            return "https://l1sync.ankiweb.net/sync/"
-        return SYNC_BASE + "sync/"
+    def __init__(self, hkey, hostNum):
+        HttpSyncer.__init__(self, hkey, hostNum=hostNum)
 
     def hostKey(self, user, pw):
         "Returns hkey or none if user/pw incorrect."
@@ -619,19 +624,14 @@ class RemoteServer(HttpSyncer):
 
 class FullSyncer(HttpSyncer):
 
-    def __init__(self, col, hkey, client):
-        HttpSyncer.__init__(self, hkey, client)
+    def __init__(self, col, hkey, client, hostNum):
+        HttpSyncer.__init__(self, hkey, client, hostNum=hostNum)
         self.postVars = dict(
             k=self.hkey,
             v="ankidesktop,%s,%s"%(anki.version, platDesc()),
         )
         self.col = col
 
-    def syncURL(self):
-        if devMode:
-            return "https://l1.ankiweb.net/sync/"
-        return SYNC_BASE + "sync/"
-
     def download(self):
         runHook("sync", "download")
         self.col.close()
@@ -810,14 +810,10 @@ class MediaSyncer:
 
 class RemoteMediaServer(HttpSyncer):
 
-    def __init__(self, col, hkey, client):
+    def __init__(self, col, hkey, client, hostNum):
         self.col = col
-        HttpSyncer.__init__(self, hkey, client)
-
-    def syncURL(self):
-        if devMode:
-            return "https://l1.ankiweb.net/msync/"
-        return SYNC_MEDIA_BASE
+        HttpSyncer.__init__(self, hkey, client, hostNum=hostNum)
+        self.prefix = "msync/"
 
     def begin(self):
         self.postVars = dict(
diff --git a/aqt/sync.py b/aqt/sync.py
index 91f527f88..28dde3225 100644
--- a/aqt/sync.py
+++ b/aqt/sync.py
@@ -43,7 +43,9 @@ class SyncManager(QObject):
         # create the thread, setup signals and start running
         t = self.thread = SyncThread(
             self.pm.collectionPath(), self.pm.profile['syncKey'],
-            auth=auth, media=self.pm.profile['syncMedia'])
+            auth=auth, media=self.pm.profile['syncMedia'],
+            hostNum=self.pm.profile.get("hostNum"),
+        )
         t.event.connect(self.onEvent)
         self.label = _("Connecting...")
         prog = self.mw.progress.start(immediate=True, label=self.label)
@@ -64,6 +66,7 @@ class SyncManager(QObject):
             showText(self.thread.syncMsg)
         if self.thread.uname:
             self.pm.profile['syncUser'] = self.thread.uname
+        self.pm.profile['hostNum'] = self.thread.hostNum
         def delayedInfo():
             if self._didFullUp and not self._didError:
                 showInfo(_("""\
@@ -290,12 +293,13 @@ class SyncThread(QThread):
 
     event = pyqtSignal(str, str)
 
-    def __init__(self, path, hkey, auth=None, media=True):
+    def __init__(self, path, hkey, auth=None, media=True, hostNum=None):
         QThread.__init__(self)
         self.path = path
         self.hkey = hkey
         self.auth = auth
         self.media = media
+        self.hostNum = hostNum
         self._abort = 0 # 1=flagged, 2=aborting
 
     def flagAbort(self):
@@ -311,7 +315,7 @@ class SyncThread(QThread):
         except:
             self.fireEvent("corrupt")
             return
-        self.server = RemoteServer(self.hkey)
+        self.server = RemoteServer(self.hkey, hostNum=self.hostNum)
         self.client = Syncer(self.col, self.server)
         self.sentTotal = 0
         self.recvTotal = 0
@@ -405,6 +409,7 @@ class SyncThread(QThread):
             self.fireEvent("error", "Unknown sync return code.")
         self.syncMsg = self.client.syncMsg
         self.uname = self.client.uname
+        self.hostNum = self.client.hostNum
         # then move on to media sync
         self._syncMedia()
 
@@ -419,7 +424,8 @@ class SyncThread(QThread):
         f = self.fullSyncChoice
         if f == "cancel":
             return
-        self.client = FullSyncer(self.col, self.hkey, self.server.client)
+        self.client = FullSyncer(self.col, self.hkey, self.server.client,
+                                 hostNum=self.hostNum)
         try:
             if f == "upload":
                 if not self.client.upload():
@@ -437,7 +443,8 @@ class SyncThread(QThread):
     def _syncMedia(self):
         if not self.media:
             return
-        self.server = RemoteMediaServer(self.col, self.hkey, self.server.client)
+        self.server = RemoteMediaServer(self.col, self.hkey, self.server.client,
+                                        hostNum=self.hostNum)
         self.client = MediaSyncer(self.col, self.server)
         try:
             ret = self.client.sync()