diff --git a/staticlibs/device/com/android/net/module/util/DeviceConfigUtils.java b/staticlibs/device/com/android/net/module/util/DeviceConfigUtils.java
index e646f37..1714f28 100644
--- a/staticlibs/device/com/android/net/module/util/DeviceConfigUtils.java
+++ b/staticlibs/device/com/android/net/module/util/DeviceConfigUtils.java
@@ -63,6 +63,9 @@
     @VisibleForTesting
     public static final long DEFAULT_PACKAGE_VERSION = 1000;
 
+    private static final String CORE_NETWORKING_TRUNK_STABLE_NAMESPACE = "android_core_networking";
+    private static final String CORE_NETWORKING_TRUNK_STABLE_FLAG_PACKAGE = "com.android.net.flags";
+
     @VisibleForTesting
     public static void resetPackageVersionCacheForTest() {
         sPackageVersion = -1;
@@ -414,4 +417,31 @@
 
         return pkgs.get(0).activityInfo.applicationInfo.packageName;
     }
+
+    /**
+     * Check whether one specific trunk stable flag in android_core_networking namespace is enabled.
+     * This method reads trunk stable feature flag value from DeviceConfig directly since
+     * java_aconfig_library soong module is not available in the mainline branch.
+     * After the mainline branch support the aconfig soong module, this function must be removed and
+     * java_aconfig_library must be used instead to check if the feature is enabled.
+     *
+     * @param flagName The name of the trunk stable flag
+     * @return true if this feature is enabled, or false if disabled.
+     */
+    public static boolean isTrunkStableFeatureEnabled(final String flagName) {
+        return isTrunkStableFeatureEnabled(
+                CORE_NETWORKING_TRUNK_STABLE_NAMESPACE,
+                CORE_NETWORKING_TRUNK_STABLE_FLAG_PACKAGE,
+                flagName
+        );
+    }
+
+    private static boolean isTrunkStableFeatureEnabled(final String namespace,
+            final String packageName, final String flagName) {
+        return DeviceConfig.getBoolean(
+                namespace,
+                packageName + "." + flagName,
+                false /* defaultValue */
+        );
+    }
 }
diff --git a/staticlibs/tests/unit/src/com/android/net/module/util/DeviceConfigUtilsTest.java b/staticlibs/tests/unit/src/com/android/net/module/util/DeviceConfigUtilsTest.java
index 5a96bcb..befd751 100644
--- a/staticlibs/tests/unit/src/com/android/net/module/util/DeviceConfigUtilsTest.java
+++ b/staticlibs/tests/unit/src/com/android/net/module/util/DeviceConfigUtilsTest.java
@@ -71,6 +71,10 @@
 public class DeviceConfigUtilsTest {
     private static final String TEST_NAME_SPACE = "connectivity";
     private static final String TEST_EXPERIMENT_FLAG = "experiment_flag";
+    private static final String CORE_NETWORKING_TRUNK_STABLE_NAMESPACE = "android_core_networking";
+    private static final String TEST_TRUNK_STABLE_FLAG = "trunk_stable_feature";
+    private static final String TEST_CORE_NETWORKING_TRUNK_STABLE_FLAG_PROPERTY =
+            "com.android.net.flags.trunk_stable_feature";
     private static final int TEST_FLAG_VALUE = 28;
     private static final String TEST_FLAG_VALUE_STRING = "28";
     private static final int TEST_DEFAULT_FLAG_VALUE = 0;
@@ -436,4 +440,25 @@
                                                eq(TEST_EXPERIMENT_FLAG)));
         assertFalse(DeviceConfigUtils.isNetworkStackFeatureNotChickenedOut(TEST_EXPERIMENT_FLAG));
     }
+
+    @Test
+    public void testIsCoreNetworkingTrunkStableFeatureEnabled() {
+        doReturn(null).when(() -> DeviceConfig.getProperty(
+                CORE_NETWORKING_TRUNK_STABLE_NAMESPACE,
+                TEST_CORE_NETWORKING_TRUNK_STABLE_FLAG_PROPERTY));
+        assertFalse(DeviceConfigUtils.isTrunkStableFeatureEnabled(
+                TEST_TRUNK_STABLE_FLAG));
+
+        doReturn("false").when(() -> DeviceConfig.getProperty(
+                CORE_NETWORKING_TRUNK_STABLE_NAMESPACE,
+                TEST_CORE_NETWORKING_TRUNK_STABLE_FLAG_PROPERTY));
+        assertFalse(DeviceConfigUtils.isTrunkStableFeatureEnabled(
+                TEST_TRUNK_STABLE_FLAG));
+
+        doReturn("true").when(() -> DeviceConfig.getProperty(
+                CORE_NETWORKING_TRUNK_STABLE_NAMESPACE,
+                TEST_CORE_NETWORKING_TRUNK_STABLE_FLAG_PROPERTY));
+        assertTrue(DeviceConfigUtils.isTrunkStableFeatureEnabled(
+                TEST_TRUNK_STABLE_FLAG));
+    }
 }