diff --git a/Tethering/src/android/net/ip/IpServer.java b/Tethering/src/android/net/ip/IpServer.java
index 7a6df88..f60d7a1 100644
--- a/Tethering/src/android/net/ip/IpServer.java
+++ b/Tethering/src/android/net/ip/IpServer.java
@@ -70,13 +70,13 @@
 import com.android.internal.util.State;
 import com.android.modules.utils.build.SdkLevel;
 import com.android.net.module.util.InterfaceParams;
+import com.android.net.module.util.IIpv4PrefixRequest;
 import com.android.net.module.util.NetdUtils;
 import com.android.net.module.util.RoutingCoordinatorManager;
 import com.android.net.module.util.SharedLog;
 import com.android.net.module.util.SyncStateMachine.StateInfo;
 import com.android.net.module.util.ip.InterfaceController;
 import com.android.networkstack.tethering.BpfCoordinator;
-import com.android.networkstack.tethering.PrivateAddressCoordinator;
 import com.android.networkstack.tethering.TetheringConfiguration;
 import com.android.networkstack.tethering.metrics.TetheringMetrics;
 import com.android.networkstack.tethering.util.InterfaceSet;
@@ -242,9 +242,10 @@
     private final BpfCoordinator mBpfCoordinator;
     @NonNull
     private final RoutingCoordinatorManager mRoutingCoordinator;
+    @NonNull
+    private final IIpv4PrefixRequest mIpv4PrefixRequest;
     private final Callback mCallback;
     private final InterfaceController mInterfaceCtrl;
-    private final PrivateAddressCoordinator mPrivateAddressCoordinator;
 
     private final String mIfaceName;
     private final int mInterfaceType;
@@ -301,7 +302,7 @@
             String ifaceName, Handler handler, int interfaceType, SharedLog log,
             INetd netd, @NonNull BpfCoordinator bpfCoordinator,
             RoutingCoordinatorManager routingCoordinatorManager, Callback callback,
-            TetheringConfiguration config, PrivateAddressCoordinator addressCoordinator,
+            TetheringConfiguration config,
             TetheringMetrics tetheringMetrics, Dependencies deps) {
         super(ifaceName, USE_SYNC_SM ? null : handler.getLooper());
         mHandler = handler;
@@ -309,6 +310,12 @@
         mNetd = netd;
         mBpfCoordinator = bpfCoordinator;
         mRoutingCoordinator = routingCoordinatorManager;
+        mIpv4PrefixRequest = new IIpv4PrefixRequest.Stub() {
+            @Override
+            public void onIpv4PrefixConflict(IpPrefix ipPrefix) throws RemoteException {
+                sendMessage(CMD_NOTIFY_PREFIX_CONFLICT);
+            }
+        };
         mCallback = callback;
         mInterfaceCtrl = new InterfaceController(ifaceName, mNetd, mLog);
         mIfaceName = ifaceName;
@@ -317,7 +324,6 @@
         mUsingLegacyDhcp = config.useLegacyDhcpServer();
         mP2pLeasesSubnetPrefixLength = config.getP2pLeasesSubnetPrefixLength();
         mIsWifiP2pDedicatedIpEnabled = config.shouldEnableWifiP2pDedicatedIp();
-        mPrivateAddressCoordinator = addressCoordinator;
         mDeps = deps;
         mTetheringMetrics = tetheringMetrics;
         resetLinkProperties();
@@ -395,6 +401,11 @@
         return mInterfaceParams;
     }
 
+    @VisibleForTesting
+    public IIpv4PrefixRequest getIpv4PrefixRequest() {
+        return mIpv4PrefixRequest;
+    }
+
     /**
      * Get the latest list of DHCP leases that was reported. Must be called on the IpServer looper
      * thread.
@@ -643,7 +654,7 @@
         // NOTE: All of configureIPv4() will be refactored out of existence
         // into calls to InterfaceController, shared with startIPv4().
         mInterfaceCtrl.clearIPv4Address();
-        mPrivateAddressCoordinator.releaseDownstream(this);
+        mRoutingCoordinator.releaseDownstream(mIpv4PrefixRequest);
         mBpfCoordinator.tetherOffloadClientClear(this);
         mIpv4Address = null;
         mStaticIpv4ServerAddr = null;
@@ -714,7 +725,8 @@
 
         if (shouldUseWifiP2pDedicatedIp()) return new LinkAddress(LEGACY_WIFI_P2P_IFACE_ADDRESS);
 
-        return mPrivateAddressCoordinator.requestDownstreamAddress(this, scope, useLastAddress);
+        return mRoutingCoordinator.requestDownstreamAddress(mInterfaceType, scope, useLastAddress,
+                mIpv4PrefixRequest);
     }
 
     private boolean startIPv6() {
diff --git a/Tethering/src/com/android/networkstack/tethering/Tethering.java b/Tethering/src/com/android/networkstack/tethering/Tethering.java
index 13b8004..df255f3 100644
--- a/Tethering/src/com/android/networkstack/tethering/Tethering.java
+++ b/Tethering/src/com/android/networkstack/tethering/Tethering.java
@@ -253,7 +253,6 @@
     private final TetheringNotificationUpdater mNotificationUpdater;
     private final UserManager mUserManager;
     private final BpfCoordinator mBpfCoordinator;
-    private final PrivateAddressCoordinator mPrivateAddressCoordinator;
     private final TetheringMetrics mTetheringMetrics;
     private final WearableConnectionManager mWearableConnectionManager;
     private int mActiveDataSubId = INVALID_SUBSCRIPTION_ID;
@@ -359,7 +358,6 @@
         // Load tethering configuration.
         updateConfiguration();
         mConfig.readEnableSyncSM(mContext);
-        mPrivateAddressCoordinator = mDeps.makePrivateAddressCoordinator(mContext);
 
         // Must be initialized after tethering configuration is loaded because BpfCoordinator
         // constructor needs to use the configuration.
@@ -2001,11 +1999,11 @@
             final UpstreamNetworkState ns = (UpstreamNetworkState) o;
             switch (arg1) {
                 case UpstreamNetworkMonitor.EVENT_ON_LINKPROPERTIES:
-                    mPrivateAddressCoordinator.updateUpstreamPrefix(
+                    mRoutingCoordinator.updateUpstreamPrefix(
                             ns.linkProperties, ns.networkCapabilities, ns.network);
                     break;
                 case UpstreamNetworkMonitor.EVENT_ON_LOST:
-                    mPrivateAddressCoordinator.removeUpstreamPrefix(ns.network);
+                    mRoutingCoordinator.removeUpstreamPrefix(ns.network);
                     break;
             }
 
@@ -2075,7 +2073,7 @@
                     return;
                 }
 
-                mPrivateAddressCoordinator.maybeRemoveDeprecatedUpstreams();
+                mRoutingCoordinator.maybeRemoveDeprecatedUpstreams();
                 mUpstreamNetworkMonitor.startObserveAllNetworks();
 
                 // TODO: De-duplicate with updateUpstreamWanted() below.
@@ -2663,11 +2661,6 @@
 
         dumpBpf(pw);
 
-        pw.println("Private address coordinator:");
-        pw.increaseIndent();
-        mPrivateAddressCoordinator.dump(pw);
-        pw.decreaseIndent();
-
         if (mWearableConnectionManager != null) {
             pw.println("WearableConnectionManager:");
             pw.increaseIndent();
@@ -2821,8 +2814,7 @@
         mLog.i("adding IpServer for: " + iface);
         final TetherState tetherState = new TetherState(
                 new IpServer(iface, mHandler, interfaceType, mLog, mNetd, mBpfCoordinator,
-                        mRoutingCoordinator, new ControlCallback(), mConfig,
-                        mPrivateAddressCoordinator, mTetheringMetrics,
+                        mRoutingCoordinator, new ControlCallback(), mConfig, mTetheringMetrics,
                         mDeps.makeIpServerDependencies()), isNcm);
         mTetherStates.put(iface, tetherState);
         tetherState.ipServer.start();