diff --git a/src/main/java/org/opentripplanner/middleware/models/Device.java b/src/main/java/org/opentripplanner/middleware/models/Device.java
new file mode 100644
index 000000000..7ff94435f
--- /dev/null
+++ b/src/main/java/org/opentripplanner/middleware/models/Device.java
@@ -0,0 +1,14 @@
+package org.opentripplanner.middleware.models;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class Device {
+    @JsonProperty("DeviceName")
+    public String deviceName;
+
+    public String getDeviceName() {
+        return deviceName;
+    }
+}
diff --git a/src/main/java/org/opentripplanner/middleware/utils/NotificationUtils.java b/src/main/java/org/opentripplanner/middleware/utils/NotificationUtils.java
index 0cae5f69f..0c88b2fad 100644
--- a/src/main/java/org/opentripplanner/middleware/utils/NotificationUtils.java
+++ b/src/main/java/org/opentripplanner/middleware/utils/NotificationUtils.java
@@ -14,6 +14,7 @@
 import org.eclipse.jetty.util.StringUtil;
 import org.opentripplanner.middleware.bugsnag.BugsnagReporter;
 import org.opentripplanner.middleware.models.AdminUser;
+import org.opentripplanner.middleware.models.Device;
 import org.opentripplanner.middleware.models.OtpUser;
 import org.opentripplanner.middleware.persistence.Persistence;
 import org.slf4j.Logger;
@@ -22,7 +23,10 @@
 import java.io.IOException;
 import java.net.URI;
 import java.net.URLEncoder;
+import java.util.List;
 import java.util.Map;
+import java.util.Objects;
+import java.util.stream.Collectors;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static org.opentripplanner.middleware.utils.ConfigUtils.getConfigPropertyAsText;
@@ -352,9 +356,9 @@ public static int getPushInfo(String toUser) {
                 null
             );
             if (httpResponse.status == 200) {
-                // We don't use any of this information, we only care how many devices are registered.
-                var devices = JsonUtils.getPOJOFromHttpBodyAsList(httpResponse, Object.class);
-                return devices.size();
+                return getNumberOfUniqueDevices(
+                    Objects.requireNonNull(JsonUtils.getPOJOFromHttpBodyAsList(httpResponse, Device.class))
+                );
             } else {
                 LOG.error("Error {} while getting info on push notification devices", httpResponse.status);
             }
@@ -364,6 +368,18 @@ public static int getPushInfo(String toUser) {
         return 0;
     }
 
+    /**
+     * Return the number of unique, non null, device names.
+     */
+    public static int getNumberOfUniqueDevices(List<Device> devices) {
+        return devices
+            .stream()
+            .map(Device::getDeviceName)
+            .filter(Objects::nonNull)
+            .collect(Collectors.toSet())
+            .size();
+    }
+
     static String getPushDevicesUrl(String baseUrl, String toUser) {
         return baseUrl + URLEncoder.encode(toUser, UTF_8);
     }
diff --git a/src/test/java/org/opentripplanner/middleware/utils/NotificationUtilsTest.java b/src/test/java/org/opentripplanner/middleware/utils/NotificationUtilsTest.java
index a691c8a93..ec3a48b2a 100644
--- a/src/test/java/org/opentripplanner/middleware/utils/NotificationUtilsTest.java
+++ b/src/test/java/org/opentripplanner/middleware/utils/NotificationUtilsTest.java
@@ -7,7 +7,9 @@
 import org.junit.jupiter.params.provider.MethodSource;
 import org.junit.jupiter.params.provider.NullSource;
 import org.junit.jupiter.params.provider.ValueSource;
+import org.opentripplanner.middleware.models.Device;
 
+import java.util.List;
 import java.util.stream.Stream;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -54,6 +56,32 @@ void testGetPushDevicesUrl() {
         );
     }
 
+    @Test
+    void testNumberOfUniqueDevices() {
+        String payload =
+            "[" +
+            "  {" +
+            "    \"DeviceName\": null" +
+            "  }," +
+            "  {" +
+            "    \"DeviceName\": null" +
+            "  }," +
+            "  {" +
+            "    \"DeviceName\": \"iPhone\"" +
+            "  }," +
+            "  {" +
+            "    \"DeviceName\": null" +
+            "  }," +
+            "  {" +
+            "    \"DeviceName\": \"Android\"" +
+            "  }" +
+            "]";
+
+        List<Device> devices = JsonUtils.getPOJOFromJSONAsList(payload, Device.class);
+        assertEquals(5, devices.size());
+        assertEquals(2, NotificationUtils.getNumberOfUniqueDevices(devices));
+    }
+
     @ParameterizedTest
     @MethodSource("createNotificationInfoCases")
     void testTruncateNotificationPayload(String originalTitle, String expectedTitle, String originalMessage, String expectedMessage, String message) {