diff --git a/src/main/java/com/redislabs/redistimeseries/MultiRangeParams.java b/src/main/java/com/redislabs/redistimeseries/MultiRangeParams.java
index 0ec0f60..62f8a61 100644
--- a/src/main/java/com/redislabs/redistimeseries/MultiRangeParams.java
+++ b/src/main/java/com/redislabs/redistimeseries/MultiRangeParams.java
@@ -54,10 +54,20 @@ public MultiRangeParams withLabels(boolean withLabels) {
     return this;
   }
 
-  public byte[][] getByteParams(long from, long to, String... filters) {
+  public byte[][] getByteParams(Long from, Long to, String... filters) {
     List<byte[]> params = new ArrayList<>();
-    params.add(Protocol.toByteArray(from));
-    params.add(Protocol.toByteArray(to));
+
+    if (from == null) {
+      params.add("-".getBytes());
+    } else {
+      params.add(Protocol.toByteArray(from));
+    }
+
+    if (to == null) {
+      params.add("+".getBytes());
+    } else {
+      params.add(Protocol.toByteArray(to));
+    }
 
     if (filterByTimestamps != null) {
       params.add(Keyword.FILTER_BY_TS.getRaw());
diff --git a/src/main/java/com/redislabs/redistimeseries/RangeParams.java b/src/main/java/com/redislabs/redistimeseries/RangeParams.java
index 0c353e1..ac9af79 100644
--- a/src/main/java/com/redislabs/redistimeseries/RangeParams.java
+++ b/src/main/java/com/redislabs/redistimeseries/RangeParams.java
@@ -40,11 +40,21 @@ public RangeParams aggregation(Aggregation aggregation, long timeBucket) {
     return this;
   }
 
-  public byte[][] getByteParams(String key, long from, long to) {
+  public byte[][] getByteParams(String key, Long from, Long to) {
     List<byte[]> params = new ArrayList<>();
     params.add(SafeEncoder.encode(key));
-    params.add(Protocol.toByteArray(from));
-    params.add(Protocol.toByteArray(to));
+
+    if (from == null) {
+      params.add("-".getBytes());
+    } else {
+      params.add(Protocol.toByteArray(from));
+    }
+
+    if (to == null) {
+      params.add("+".getBytes());
+    } else {
+      params.add(Protocol.toByteArray(to));
+    }
 
     if (filterByTimestamps != null) {
       params.add(Keyword.FILTER_BY_TS.getRaw());
diff --git a/src/main/java/com/redislabs/redistimeseries/RedisTimeSeries.java b/src/main/java/com/redislabs/redistimeseries/RedisTimeSeries.java
index 4581176..7a06c70 100644
--- a/src/main/java/com/redislabs/redistimeseries/RedisTimeSeries.java
+++ b/src/main/java/com/redislabs/redistimeseries/RedisTimeSeries.java
@@ -692,12 +692,12 @@ public Value[] range(
    * TS.RANGE key fromTimestamp toTimestamp [COUNT count] [AGGREGATION aggregationType timeBucket]
    *
    * @param key
-   * @param from
-   * @param to
+   * @param from timestamp. {@code null} represents {@code "-"}
+   * @param to timestamp. {@code null} represents {@code "+"}
    * @param rangeParams
    * @return
    */
-  public Value[] range(String key, long from, long to, RangeParams rangeParams) {
+  public Value[] range(String key, Long from, Long to, RangeParams rangeParams) {
     try (Jedis conn = getConnection()) {
       Object obj =
           sendCommand(conn, Command.RANGE, rangeParams.getByteParams(key, from, to)).getOne();
@@ -793,12 +793,12 @@ public Value[] revrange(
    * timeBucket]
    *
    * @param key
-   * @param from
-   * @param to
+   * @param from timestamp. {@code null} represents {@code "-"}
+   * @param to timestamp. {@code null} represents {@code "+"}
    * @param rangeParams
    * @return
    */
-  public Value[] revrange(String key, long from, long to, RangeParams rangeParams) {
+  public Value[] revrange(String key, Long from, Long to, RangeParams rangeParams) {
     try (Jedis conn = getConnection()) {
       Object obj =
           sendCommand(conn, Command.REVRANGE, rangeParams.getByteParams(key, from, to)).getOne();
@@ -948,13 +948,13 @@ private Range[] multiRange(
    * TS.MRANGE fromTimestamp toTimestamp [COUNT count] [AGGREGATION aggregationType timeBucket]
    * [WITHLABELS] FILTER filter...
    *
-   * @param from
-   * @param to
+   * @param from timestamp. {@code null} represents {@code "-"}
+   * @param to timestamp. {@code null} represents {@code "+"}
    * @param multiRangeParams
    * @param filters
    * @return
    */
-  public Range[] mrange(long from, long to, MultiRangeParams multiRangeParams, String... filters) {
+  public Range[] mrange(Long from, Long to, MultiRangeParams multiRangeParams, String... filters) {
     try (Jedis conn = getConnection()) {
       Object obj =
           sendCommand(conn, Command.MRANGE, multiRangeParams.getByteParams(from, to, filters))
@@ -1060,14 +1060,14 @@ public Range[] mrevrange(
    * TS.MREVRANGE fromTimestamp toTimestamp [COUNT count] [AGGREGATION aggregationType timeBucket]
    * [WITHLABELS] FILTER filter...
    *
-   * @param from
-   * @param to
+   * @param from timestamp. {@code null} represents {@code "-"}
+   * @param to timestamp. {@code null} represents {@code "+"}
    * @param multiRangeParams
    * @param filters
    * @return
    */
   public Range[] mrevrange(
-      long from, long to, MultiRangeParams multiRangeParams, String... filters) {
+      Long from, Long to, MultiRangeParams multiRangeParams, String... filters) {
     try (Jedis conn = getConnection()) {
       Object obj =
           sendCommand(conn, Command.MREVRANGE, multiRangeParams.getByteParams(from, to, filters))
diff --git a/src/test/java/com/redislabs/redistimeseries/RedisTimeSeriesTest.java b/src/test/java/com/redislabs/redistimeseries/RedisTimeSeriesTest.java
index 6f736de..d6920cc 100644
--- a/src/test/java/com/redislabs/redistimeseries/RedisTimeSeriesTest.java
+++ b/src/test/java/com/redislabs/redistimeseries/RedisTimeSeriesTest.java
@@ -142,6 +142,8 @@ public void testAdd() {
     labels.put("l1", "v1");
     labels.put("l2", "v2");
     Assert.assertTrue(client.create("seriesAdd", 10000L /*retentionTime*/, labels));
+    assertArrayEquals(
+        new Value[0], client.range("seriesAdd", null, null, RangeParams.rangeParams()));
 
     Assert.assertEquals(1000L, client.add("seriesAdd", 1000L, 1.1, 10000, null));
     Assert.assertEquals(2000L, client.add("seriesAdd", 2000L, 0.9, (Map<String, String>) null));
@@ -161,6 +163,7 @@ public void testAdd() {
     values = client.range("seriesAdd", 800L, 5000L);
     Assert.assertEquals(4, values.length);
     Assert.assertArrayEquals(rawValues, values);
+    assertArrayEquals(rawValues, client.range("seriesAdd", null, null, RangeParams.rangeParams()));
 
     Value[] expectedCountValues =
         new Value[] {new Value(2000L, 1), new Value(3200L, 1), new Value(4500L, 1)};
@@ -194,6 +197,9 @@ public void testAdd() {
     Assert.assertEquals(1, values.length);
     Assert.assertArrayEquals(expectedOverallMaxValues, values);
 
+    // MRANGE
+    assertArrayEquals(
+        new Range[0], client.mrange(null, null, MultiRangeParams.multiRangeParams(), "l=v"));
     try {
       client.mrange(500L, 4600L, Aggregation.COUNT, 1);
       Assert.fail();
@@ -690,6 +696,8 @@ public void testRevRange() {
     labels.put("l1", "v1");
     labels.put("l2", "v2");
     Assert.assertTrue(client.create("seriesAdd", 10000L /*retentionTime*/, labels));
+    assertArrayEquals(
+        new Value[0], client.revrange("seriesAdd", null, null, RangeParams.rangeParams()));
 
     Assert.assertEquals(1000L, client.add("seriesRevRange", 1000L, 1.1, 10000, null));
     Assert.assertEquals(
@@ -710,6 +718,8 @@ public void testRevRange() {
     values = client.revrange("seriesRevRange", 800L, 5000L);
     Assert.assertEquals(4, values.length);
     Assert.assertArrayEquals(rawValues, values);
+    assertArrayEquals(
+        rawValues, client.revrange("seriesRevRange", null, null, RangeParams.rangeParams()));
 
     Value[] expectedCountValues =
         new Value[] {new Value(4500L, 1), new Value(3200L, 1), new Value(2000L, 1)};
@@ -727,6 +737,8 @@ public void testRevRange() {
   @Test
   public void testMRevRange() {
     if (moduleVersion < 10300) return;
+    assertArrayEquals(
+        new Range[0], client.mrevrange(null, null, MultiRangeParams.multiRangeParams(), "l=v"));
 
     Map<String, String> labels1 = new HashMap<>();
     labels1.put("l3", "v3");