diff --git a/enabler/src/de/schildbach/pte/AbstractHafasClientInterfaceProvider.java b/enabler/src/de/schildbach/pte/AbstractHafasClientInterfaceProvider.java
index 20fee7ca..1359c09b 100644
--- a/enabler/src/de/schildbach/pte/AbstractHafasClientInterfaceProvider.java
+++ b/enabler/src/de/schildbach/pte/AbstractHafasClientInterfaceProvider.java
@@ -87,6 +87,8 @@ public abstract class AbstractHafasClientInterfaceProvider extends AbstractHafas
     @Nullable
     private String apiVersion;
     @Nullable
+    private String apiExt;
+    @Nullable
     private String apiAuthorization;
     @Nullable
     private String apiClient;
@@ -117,6 +119,11 @@ public abstract class AbstractHafasClientInterfaceProvider extends AbstractHafas
         return this;
     }
 
+    protected AbstractHafasClientInterfaceProvider setApiExt(final String apiExt) {
+        this.apiExt = checkNotNull(apiExt);
+        return this;
+    }
+
     protected AbstractHafasClientInterfaceProvider setApiAuthorization(final String apiAuthorization) {
         this.apiAuthorization = apiAuthorization;
         return this;
@@ -704,6 +711,7 @@ public abstract class AbstractHafasClientInterfaceProvider extends AbstractHafas
         return "{" //
                 + (apiAuthorization != null ? "\"auth\":" + apiAuthorization + "," : "") //
                 + "\"client\":" + checkNotNull(apiClient) + "," //
+                + (apiExt != null ? "\"ext\":\"" + apiExt + "\"," : "") //
                 + "\"ver\":\"" + checkNotNull(apiVersion) + "\",\"lang\":\"eng\"," //
                 + "\"svcReqL\":[" //
                 + "{\"meth\":\"ServerInfo\",\"req\":{\"getServerDateTime\":true,\"getTimeTablePeriod\":false}}," //
diff --git a/enabler/src/de/schildbach/pte/DbProvider.java b/enabler/src/de/schildbach/pte/DbProvider.java
index cbb2b54e..c858de7d 100644
--- a/enabler/src/de/schildbach/pte/DbProvider.java
+++ b/enabler/src/de/schildbach/pte/DbProvider.java
@@ -41,6 +41,7 @@ public final class DbProvider extends AbstractHafasClientInterfaceProvider {
     public DbProvider(final String apiAuthorization) {
         super(NetworkId.DB, API_BASE, PRODUCTS_MAP);
         setApiVersion("1.14");
+        setApiExt("DB.R15.12.a");
         setApiClient("{\"id\":\"DB\",\"v\":\"16040000\",\"type\":\"AND\",\"name\":\"DB Navigator\"}");
         setApiAuthorization(apiAuthorization);
         setRequestChecksumSalt("bdI8UVj40K5fvxwf".getBytes(Charsets.UTF_8));
diff --git a/enabler/test/de/schildbach/pte/live/DbProviderLiveTest.java b/enabler/test/de/schildbach/pte/live/DbProviderLiveTest.java
index 53fda95b..f7895f5f 100644
--- a/enabler/test/de/schildbach/pte/live/DbProviderLiveTest.java
+++ b/enabler/test/de/schildbach/pte/live/DbProviderLiveTest.java
@@ -190,4 +190,12 @@ public class DbProviderLiveTest extends AbstractProviderLiveTest {
         print(result);
         assertEquals(QueryTripsResult.Status.INVALID_DATE, result.status);
     }
+
+    @Test
+    public void tripBetweenAreas() throws Exception {
+        final Location from = new Location(LocationType.STATION, "8096021"); // FRANKFURT(MAIN)
+        final Location to = new Location(LocationType.STATION, "8096022"); // KÖLN
+        final QueryTripsResult result = queryTrips(from, null, to, new Date(), true, null);
+        print(result);
+    }
 }