diff --git a/libraries-6/pom.xml b/libraries-6/pom.xml
index 2f8cc385cb..7bb6028f17 100644
--- a/libraries-6/pom.xml
+++ b/libraries-6/pom.xml
@@ -107,6 +107,12 @@
             <artifactId>renjin-script-engine</artifactId>
             <version>${renjin.version}</version>
         </dependency>
+        <!-- libphonenumber  -->
+        <dependency>
+            <groupId>com.googlecode.libphonenumber</groupId>
+            <artifactId>libphonenumber</artifactId>
+            <version>${libphonenumber.version}</version>
+        </dependency>        
     </dependencies>
 
     <repositories>
@@ -150,6 +156,7 @@
         <renjin.version>RELEASE</renjin.version>
         <rcaller.version>3.0</rcaller.version>
         <rserve.version>1.8.1</rserve.version>
+        <libphonenumber.version>8.12.9</libphonenumber.version>
     </properties>
 
 
diff --git a/libraries-6/src/test/java/com/baeldung/libphonenumber/LibPhoneNumberUnitTest.java b/libraries-6/src/test/java/com/baeldung/libphonenumber/LibPhoneNumberUnitTest.java
new file mode 100644
index 0000000000..39b96b3e38
--- /dev/null
+++ b/libraries-6/src/test/java/com/baeldung/libphonenumber/LibPhoneNumberUnitTest.java
@@ -0,0 +1,79 @@
+package com.baeldung.libphonenumber;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+import com.google.i18n.phonenumbers.NumberParseException;
+import com.google.i18n.phonenumbers.PhoneNumberUtil;
+import com.google.i18n.phonenumbers.PhoneNumberUtil.PhoneNumberType;
+import com.google.i18n.phonenumbers.Phonenumber.PhoneNumber;
+import com.google.i18n.phonenumbers.Phonenumber.PhoneNumber.CountryCodeSource;
+
+public class LibPhoneNumberUnitTest {
+
+    private static final PhoneNumberUtil phoneNumberUtil = PhoneNumberUtil.getInstance();
+
+    @Test
+    public void givenPhoneNumber_whenValid_thenOK() throws Exception {
+
+        PhoneNumber phone = phoneNumberUtil.parse("+911234567890", CountryCodeSource.UNSPECIFIED.name());
+
+        assertTrue(phoneNumberUtil.isValidNumber(phone));
+        assertTrue(phoneNumberUtil.isValidNumberForRegion(phone, "IN"));
+        assertFalse(phoneNumberUtil.isValidNumberForRegion(phone, "US"));
+        assertTrue(phoneNumberUtil.isValidNumber(phoneNumberUtil.getExampleNumber("IN")));
+    }
+
+    @Test
+    public void givenPhoneNumber_whenAlphaNumber_thenValid() {
+        assertTrue(phoneNumberUtil.isAlphaNumber("325-CARS"));
+        assertTrue(phoneNumberUtil.isAlphaNumber("0800 REPAIR"));
+        assertTrue(phoneNumberUtil.isAlphaNumber("1-800-MY-APPLE"));
+        assertTrue(phoneNumberUtil.isAlphaNumber("1-800-MY-APPLE.."));
+        assertFalse(phoneNumberUtil.isAlphaNumber("+876 1234-1234"));
+    }
+
+    @Test
+    public void givenPhoneNumber_whenPossibleForType_thenValid() {
+        PhoneNumber number = new PhoneNumber();
+        number.setCountryCode(54);
+
+        number.setNationalNumber(123456);
+        assertTrue(phoneNumberUtil.isPossibleNumberForType(number, PhoneNumberType.FIXED_LINE));
+        assertFalse(phoneNumberUtil.isPossibleNumberForType(number, PhoneNumberType.TOLL_FREE));
+
+        number.setNationalNumber(12345678901L);
+        assertFalse(phoneNumberUtil.isPossibleNumberForType(number, PhoneNumberType.FIXED_LINE));
+        assertTrue(phoneNumberUtil.isPossibleNumberForType(number, PhoneNumberType.MOBILE));
+        assertFalse(phoneNumberUtil.isPossibleNumberForType(number, PhoneNumberType.TOLL_FREE));
+    }
+
+    @Test
+    public void givenPhoneNumber_whenPossible_thenValid() {
+        PhoneNumber number = new PhoneNumber();
+        number.setCountryCode(1)
+            .setNationalNumber(123000L);
+        assertFalse(phoneNumberUtil.isPossibleNumber(number));
+        assertFalse(phoneNumberUtil.isPossibleNumber("+1 343 253 00000", "US"));
+        assertFalse(phoneNumberUtil.isPossibleNumber("(343) 253-00000", "US"));
+        assertFalse(phoneNumberUtil.isPossibleNumber("dial p for pizza", "US"));
+        assertFalse(phoneNumberUtil.isPossibleNumber("123-000", "US"));
+    }
+
+    @Test
+    public void givenPhoneNumber_whenNumberGeographical_thenValid() throws NumberParseException {
+
+        PhoneNumber phone = phoneNumberUtil.parse("+911234567890", "IN");
+        assertTrue(phoneNumberUtil.isNumberGeographical(phone));
+
+        phone = new PhoneNumber().setCountryCode(1)
+            .setNationalNumber(2530000L);
+        assertFalse(phoneNumberUtil.isNumberGeographical(phone));
+
+        phone = new PhoneNumber().setCountryCode(800)
+            .setNationalNumber(12345678L);
+        assertFalse(phoneNumberUtil.isNumberGeographical(phone));
+    }
+}