diff --git a/CHANGELOG.md b/CHANGELOG.md
index a9a737d0..90f18255 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Change Log
 
+## [5.31.0](https://github.com/plivo/plivo-dotnet/tree/v5.31.0) (2023-06-27)
+**Feature - CNAM**
+- Added New Param `cnam` in to the response of the [list all numbers API], [list single number API]
+- Added `cnam` parameter to buy number[Buy a Phone Number]  to configure CNAM while buying a US number
+- Added `callback_url` parameter to buy number[Buy a Phone Number]  to configure CNAM callback url while buying a US number
+- Added `callback_method` parameter to buy number[Buy a Phone Number]  to configure CNAM callback method while buying a US number
+- Added `cnam` parameter to update number[Update an account phone number] to configure CNAM while updating a US number
+- Added `callback_url` parameter to update number[Update an account phone number] to configure CNAM callback url while updating a US number
+- Added `callback_method` parameter to update number[Update an account phone number] to configure CNAM callback method while updating a US number
+
 ## [5.30.0](https://github.com/plivo/plivo-dotnet/tree/v5.30.0) (2023-05-02)
 **Feature - CNAM Lookup**
 - Added New Param `cnam_lookup` in to the response of the [list all numbers API], [list single number API]
diff --git a/src/Plivo/Plivo.csproj b/src/Plivo/Plivo.csproj
index e14a6d5e..356e002a 100644
--- a/src/Plivo/Plivo.csproj
+++ b/src/Plivo/Plivo.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;netstandard1.3</TargetFrameworks>
-    <ReleaseVersion>5.30.0</ReleaseVersion>
+    <ReleaseVersion>5.31.0</ReleaseVersion>
     <Version />
     <Authors>Plivo SDKs Team</Authors>
     <Owners>Plivo Inc.</Owners>
diff --git a/src/Plivo/Plivo.nuspec b/src/Plivo/Plivo.nuspec
index 1b875070..8c972c57 100644
--- a/src/Plivo/Plivo.nuspec
+++ b/src/Plivo/Plivo.nuspec
@@ -4,7 +4,7 @@
     <summary>A .NET SDK to make voice calls and send SMS using Plivo and to generate Plivo XML</summary>
     <description>A .NET SDK to make voice calls and send SMS using Plivo and to generate Plivo XML</description>
     <id>Plivo</id>
-    <version>5.30.0</version>
+    <version>5.31.0</version>
     <title>Plivo</title>
     <authors>Plivo SDKs Team</authors>
     <owners>Plivo, Inc.</owners>
@@ -12,6 +12,7 @@
     <projectUrl>http://github.com/plivo/plivo-dotnet</projectUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <releaseNotes>
+      * 5.31.0 Added New Param 'cnam' in to the response of the [list all numbers API], [list single number API]
       * 5.30.0 Added New Param 'cnam_lookup' in to the response of the [list all numbers API], [list single number API]
       * 5.29.0 Added New Param 'cnam_lookup_number_config' in GetCall and ListCalls 
       * 5.28.0 Added new Params 'MonthlyRecordingStorageAmount', 'RecordingStorageRate', 'RecordingStorageDuration' and 'RoundedRecordingDuration' to List Recordings and Get Recording APIs
diff --git a/src/Plivo/Resource/NumberUpdateResponse.cs b/src/Plivo/Resource/NumberUpdateResponse.cs
new file mode 100644
index 00000000..0b33a230
--- /dev/null
+++ b/src/Plivo/Resource/NumberUpdateResponse.cs
@@ -0,0 +1,15 @@
+namespace Plivo.Resource
+{
+    public class NumberUpdateResponse<T> : UpdateResponse<T>
+    {
+        public string NewCnam { get; set; }
+        public string CnamUpdateStatus { get; set; }
+
+        public override string ToString()
+        {
+            return base.ToString() +
+                   "NewCnam: " + NewCnam + "\n" +
+                   "CnamUpdateStatus: " + CnamUpdateStatus + "\n";
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Plivo/Resource/PhoneNumber/PhoneNumber.cs b/src/Plivo/Resource/PhoneNumber/PhoneNumber.cs
index f906d0c0..f33fb26d 100755
--- a/src/Plivo/Resource/PhoneNumber/PhoneNumber.cs
+++ b/src/Plivo/Resource/PhoneNumber/PhoneNumber.cs
@@ -65,9 +65,12 @@ public override string ToString()
         /// <returns>The buy.</returns>
         /// <param name="appId">App identifier.</param>
         /// <param name="cnamLookup">CnamLookup.</param>
-        public PhoneNumberBuyResponse Buy(string appId = null, string cnamLookup = null)
+        /// <param name="cnam">Cnam.</param>
+        /// <param name="callbackUrl">CallbackUrl.</param>
+        /// <param name="callbackMethod">CallbackMethod.</param>
+        public PhoneNumberBuyResponse Buy(string appId = null, string cnamLookup = null, string cnam = null, string callbackUrl = null, string callbackMethod = null)
         {
-            return ((PhoneNumberInterface) Interface).Buy(Id, appId, cnamLookup);
+            return ((PhoneNumberInterface) Interface).Buy(Id, appId, cnamLookup, cnam, callbackUrl, callbackMethod);
         }
         /// <summary>
         /// Asynchronously buy PhoneNumber and associate it with
@@ -76,9 +79,12 @@ public PhoneNumberBuyResponse Buy(string appId = null, string cnamLookup = null)
         /// <returns>The buy.</returns>
         /// <param name="appId">App identifier.</param>
         /// <param name="cnamLookup">Cnam Lookup</param>
-        public async Task<PhoneNumberBuyResponse> BuyAsync(string appId = null, string cnamLookup = null)
+        /// <param name="cnam">Cnam.</param>
+        /// <param name="callbackUrl">CallbackUrl.</param>
+        /// <param name="callbackMethod">CallbackMethod.</param>
+        public async Task<PhoneNumberBuyResponse> BuyAsync(string appId = null, string cnamLookup = null, string cnam = null, string callbackUrl = null, string callbackMethod = null)
         {
-            return await ((PhoneNumberInterface)Interface).BuyAsync(Id, appId, cnamLookup);
+            return await ((PhoneNumberInterface)Interface).BuyAsync(Id, appId, cnamLookup, cnam, callbackUrl, callbackMethod);
         }
         #endregion
     }
diff --git a/src/Plivo/Resource/PhoneNumber/PhoneNumberBuyResponse.cs b/src/Plivo/Resource/PhoneNumber/PhoneNumberBuyResponse.cs
index 91541231..e27f5f8e 100755
--- a/src/Plivo/Resource/PhoneNumber/PhoneNumberBuyResponse.cs
+++ b/src/Plivo/Resource/PhoneNumber/PhoneNumberBuyResponse.cs
@@ -9,7 +9,7 @@ public class PhoneNumberBuyResponse : BaseResponse
 
         public override string ToString()
         {
-            return "StatusCode:" + Status +"\n"+"[Numbers]\n" + string.Join("\n", Numbers)+"\n"+"StatusCode:" + StatusCode + "\n";
+            return "Status:" + Status +"\n"+"[Numbers]\n" + string.Join("\n", Numbers)+"\n"+"StatusCode:" + StatusCode + "\n";
         }
 
     }
@@ -18,10 +18,15 @@ public class Phone
     {
         public string Number { get; set; }
         public string Status { get; set; }
+        public string NewCnam { get; set; }
+        public string CnamUpdateStatus { get; set; }
 
         public override string ToString()
         {
-            return "Number:" + Number + "\n";
+            if (NewCnam != "") {
+               return "Number:" + Number + "\n" + "Status:" + Status + "\n" + "NewCnam:" + NewCnam + "\n" +"CnamUpdateStatus:" + CnamUpdateStatus + "\n";
+            }
+            return "Number:" + Number + "\n" + "Status:" + Status + "\n";
         }
                 
     }
diff --git a/src/Plivo/Resource/PhoneNumber/PhoneNumberInterface.cs b/src/Plivo/Resource/PhoneNumber/PhoneNumberInterface.cs
index 14ca5a9b..0dcc221c 100755
--- a/src/Plivo/Resource/PhoneNumber/PhoneNumberInterface.cs
+++ b/src/Plivo/Resource/PhoneNumber/PhoneNumberInterface.cs
@@ -130,15 +130,18 @@ public async Task<ListResponse<PhoneNumber>> ListAsync(
         /// </summary>
         /// <returns>The buy.</returns>
         /// <param name="number">Number.</param>
-        /// <param name="appId">App identifier.</param>
+        /// <param name="app_id">App identifier.</param>
         /// <param name="verificationInfo">Verification information. address_id and identity_id are the keys</param>
         /// <param name="cnamLookup">Cnam Lookup</param>
-        public PhoneNumberBuyResponse Buy(string number, string appId = null, string cnamLookup = null,
+        /// <param name="cnam">Cnam</param>
+        /// <param name="callbackUrl">callbackUrl</param>
+        /// <param name="callbackMethod">callbackMethod</param>
+        public PhoneNumberBuyResponse Buy(string number, string app_id = null, string cnamLookup = null, string cnam = null, string callbackUrl = null, string callbackMethod = null,
                                           Dictionary<string, string> verificationInfo = null )
         {
             var mandatoryParams = new List<string> {""};
             var data = CreateData(
-                mandatoryParams, new {appId, verificationInfo, cnamLookup});
+                mandatoryParams, new {app_id, verificationInfo, cnamLookup, cnam, callbackUrl, callbackMethod});
 
 			return ExecuteWithExceptionUnwrap(() =>
 			{
@@ -156,15 +159,18 @@ public PhoneNumberBuyResponse Buy(string number, string appId = null, string cna
         /// </summary>
         /// <returns>The buy.</returns>
         /// <param name="number">Number.</param>
-        /// <param name="appId">App identifier.</param>
+        /// <param name="app_id">App identifier.</param>
         /// <param name="verificationInfo">Verification information. address_id and identity_id are the keys</param>
         /// <param name="cnamLookup">Cnam Lookup</param>
-        public async Task<PhoneNumberBuyResponse> BuyAsync(string number, string appId = null, string cnamLookup = null,
+        /// <param name="cnam">Cnam</param>
+        /// <param name="callbackUrl">callbackUrl</param>
+        /// <param name="callbackMethod">callbackMethod</param>
+        public async Task<PhoneNumberBuyResponse> BuyAsync(string number, string app_id = null, string cnamLookup = null, string cnam = null, string callbackUrl = null, string callbackMethod = null,
                                           Dictionary<string, string> verificationInfo = null)
         {
             var mandatoryParams = new List<string> { "" };
             var data = CreateData(
-                mandatoryParams, new { appId, verificationInfo, cnamLookup });
+                mandatoryParams, new { app_id, verificationInfo, cnamLookup, cnam, callbackUrl, callbackMethod});
             var result = await Client.Update<PhoneNumberBuyResponse>(
                   Uri + number + "/",
                   data
diff --git a/src/Plivo/Resource/RentedNumber/RentedNumber.cs b/src/Plivo/Resource/RentedNumber/RentedNumber.cs
index 8a756a8d..5d6fec78 100755
--- a/src/Plivo/Resource/RentedNumber/RentedNumber.cs
+++ b/src/Plivo/Resource/RentedNumber/RentedNumber.cs
@@ -36,7 +36,8 @@ public class RentedNumber : Resource
         public string TollFreeSmsVerification {get; set;}
         public string RenewalDate {get; set;}
         public string CnamLookup {get; set;}
-        
+        public string Cnam{get; set;}
+
         public override string ToString()
         {
             if (string.Compare(Carrier, "Plivo", StringComparison.Ordinal) == 0)
@@ -50,6 +51,7 @@ public override string ToString()
                     "City: " + City + "\n" +
                     "Country: " + Country + "\n" +
                     "CnamLookup: " + CnamLookup + "\n" +
+                    "Cnam: " + Cnam + "\n" +
                     "MmsEnabled: " + MmsEnabled + "\n" +
                     "MmsRate: " + MmsRate + "\n" +
                     "MonthlyRentalRate: " + MonthlyRentalRate + "\n" +
@@ -104,7 +106,7 @@ public override string ToString()
         /// <param name="appId">App identifier.</param>
         /// <param name="subAccount">SubAccount.</param>
         /// <param name="alias">Alias.</param>
-        public UpdateResponse<RentedNumber> Update(
+        public NumberUpdateResponse<RentedNumber> Update(
             string appId = null, string subAccount = null, string alias = null)
         {
             var updateResponse =
@@ -132,7 +134,7 @@ public UpdateResponse<RentedNumber> Update(
         /// <param name="appId">App identifier.</param>
         /// <param name="subAccount">SubAccount.</param>
         /// <param name="alias">Alias.</param>
-        public async Task<UpdateResponse<RentedNumber>> UpdateAsync(
+        public async Task<NumberUpdateResponse<RentedNumber>> UpdateAsync(
             string appId = null, string subAccount = null, string alias = null)
         {
             var updateResponse = await ((RentedNumberInterface) Interface)
diff --git a/src/Plivo/Resource/RentedNumber/RentedNumberInterface.cs b/src/Plivo/Resource/RentedNumber/RentedNumberInterface.cs
index 3d1e235c..05c3b02d 100755
--- a/src/Plivo/Resource/RentedNumber/RentedNumberInterface.cs
+++ b/src/Plivo/Resource/RentedNumber/RentedNumberInterface.cs
@@ -72,6 +72,7 @@ public async Task<RentedNumber> GetAsync(string number)
         /// <param name="renewalDate_Gt">Renewal Date Greater Than</param>
         /// <param name="renewalDate_Gte">Renewal Date Greater Than or Equal</param>
         /// <param name="cnamLookup">Cnam Lookup configuration</param>
+        /// <param name="cnam">Cnam configuration</param>
         public ListResponse<RentedNumber> List(
             string type = null, string numberStartswith = null,
             string subaccount = null, string alias = null,
@@ -82,6 +83,7 @@ public ListResponse<RentedNumber> List(
             string renewalDate_Lt = null, string renewalDate_Lte = null,
             string renewalDate_Gt = null, string renewalDate_Gte = null,
             string cnamLookup = null,
+            string cnam = null,
             uint? limit = null, uint? offset = null)
         {
             var mandatoryParams = new List<string> {""};
@@ -103,6 +105,7 @@ public ListResponse<RentedNumber> List(
                     renewalDate_Gte,
                     renewalDate_Gt,
                     cnamLookup,
+                    cnam,
                     limit,
                     offset
                 });
@@ -187,7 +190,7 @@ public UpdateResponse<RentedNumber> AddNumber(
 
 			return ExecuteWithExceptionUnwrap(() =>
 			{
-				var result = Task.Run(async () => await Client.Update<UpdateResponse<RentedNumber>>(Uri, data).ConfigureAwait(false)).Result;
+				var result = Task.Run(async () => await Client.Update<NumberUpdateResponse<RentedNumber>>(Uri, data).ConfigureAwait(false)).Result;
                 result.Object.StatusCode = result.StatusCode;
 				return result.Object;
 			});
@@ -202,7 +205,7 @@ public UpdateResponse<RentedNumber> AddNumber(
         /// <param name="numberType">Number type.</param>
         /// <param name="appId">App identifier.</param>
         /// <param name="subaccount">Subaccount.</param>
-        public async Task<UpdateResponse<RentedNumber>> AddNumberAsync(
+        public async Task<NumberUpdateResponse<RentedNumber>> AddNumberAsync(
             List<string> numbers, string carrier, string region,
             string numberType = null, string appId = null,
             string subaccount = null)
@@ -220,7 +223,7 @@ public async Task<UpdateResponse<RentedNumber>> AddNumberAsync(
                     appId,
                     subaccount
                 });
-            var result = await Client.Update<UpdateResponse<RentedNumber>>(Uri, data);
+            var result = await Client.Update<NumberUpdateResponse<RentedNumber>>(Uri, data);
             result.Object.StatusCode = result.StatusCode;
             return result.Object;
         }
@@ -228,7 +231,7 @@ public async Task<UpdateResponse<RentedNumber>> AddNumberAsync(
 
         #region Update
         /// <summary>
-        /// Update RentedNumber with the specified number, appId, subaccount and alias.
+        /// Update RentedNumber with the specified number, appId, subaccount, alias, cnamLookup, cnam , callbackUrl and callbackMethod.
         /// </summary>
         /// <returns>The update.</returns>
         /// <param name="number">Number.</param>
@@ -237,9 +240,13 @@ public async Task<UpdateResponse<RentedNumber>> AddNumberAsync(
         /// <param name="alias">Alias.</param>
         /// <param name="verificationInfo">Verification Information.</param>
         /// <param name="cnamLookup">Cnam Lookup.</param>
-        public UpdateResponse<RentedNumber> Update(
+        /// <param name="cnam">Cnam</param>
+        /// <param name="callbackUrl">callbackUrl</param>
+        /// <param name="callbackMethod">callbackMethod</param>
+        public NumberUpdateResponse<RentedNumber> Update(
             string number, string appId = null, string subaccount = null,
-            string alias = null, Dictionary<string, string> verificationInfo = null, string cnamLookup = null)
+            string alias = null, Dictionary<string, string> verificationInfo = null, string cnamLookup = null,
+            string cnam = null, string callbackUrl = null, string callbackMethod = null)
         {
             var mandatoryParams = new List<string> {""};
             var data = CreateData(
@@ -250,13 +257,16 @@ public UpdateResponse<RentedNumber> Update(
                     subaccount,
                     alias,
                     verificationInfo,
-                    cnamLookup
+                    cnamLookup,
+                    cnam,
+                    callbackUrl,
+                    callbackMethod
                 });
             if (appId == "null") data["app_id"] = null;
 
 			return ExecuteWithExceptionUnwrap(() =>
 			{
-				var result = Task.Run(async () => await Client.Update<UpdateResponse<RentedNumber>>(
+				var result = Task.Run(async () => await Client.Update<NumberUpdateResponse<RentedNumber>>(
 					Uri + number + "/",
 					data
 				).ConfigureAwait(false)).Result;
@@ -265,7 +275,7 @@ public UpdateResponse<RentedNumber> Update(
 			});
         }
         /// <summary>
-        /// Asynchronously update RentedNumber with the specified number, appId, subaccount and alias.
+        /// Asynchronously update RentedNumber with the specified number, appId, subaccount cnamLookup, cnam , callbackUrl and callbackMethod.
         /// </summary>
         /// <returns>The update.</returns>
         /// <param name="number">Number.</param>
@@ -274,9 +284,13 @@ public UpdateResponse<RentedNumber> Update(
         /// <param name="alias">Alias.</param>
         /// <param name="verificationInfo">Verification Information.</param>
         /// <param name="cnamLookup">Cnam Lookup.</param>
-        public async Task<UpdateResponse<RentedNumber>> UpdateAsync(
+        /// <param name="cnam">Cnam</param>
+        /// <param name="callbackUrl">callbackUrl</param>
+        /// <param name="callbackMethod">callbackMethod</param>
+        public async Task<NumberUpdateResponse<RentedNumber>> UpdateAsync(
             string number, string appId = null, string subaccount = null,
-            string alias = null, Dictionary<string, string> verificationInfo = null, string cnamLookup = null)
+            string alias = null, Dictionary<string, string> verificationInfo = null, string cnamLookup = null,
+            string cnam = null, string callbackUrl = null, string callbackMethod = null)
         {
             var mandatoryParams = new List<string> { "" };
             var data = CreateData(
@@ -287,10 +301,13 @@ public async Task<UpdateResponse<RentedNumber>> UpdateAsync(
                     subaccount,
                     alias,
                     verificationInfo,
-                    cnamLookup
+                    cnamLookup,
+                    cnam,
+                    callbackUrl,
+                    callbackMethod
                 });
             if (appId == "null") data["app_id"] = null;
-            var result = await Client.Update<UpdateResponse<RentedNumber>>(
+            var result = await Client.Update<NumberUpdateResponse<RentedNumber>>(
         Uri + number + "/",
         data
     );
diff --git a/src/Plivo/Version.cs b/src/Plivo/Version.cs
index 95c2b4aa..ff096991 100644
--- a/src/Plivo/Version.cs
+++ b/src/Plivo/Version.cs
@@ -10,7 +10,7 @@ public class Version
         /// <summary>
         /// DotNet SDK version
         /// </summary>
-        public const string SdkVersion = "5.30.0";
+        public const string SdkVersion = "5.31.0";
         /// <summary>
         /// Plivo API version
         /// </summary>
diff --git a/tests/Plivo.Test/Mocks/numberGetResponse.json b/tests/Plivo.Test/Mocks/numberGetResponse.json
index 2798285a..a5c1a06f 100755
--- a/tests/Plivo.Test/Mocks/numberGetResponse.json
+++ b/tests/Plivo.Test/Mocks/numberGetResponse.json
@@ -18,5 +18,6 @@
   "tendlc_registration_status": "COMPLETED",
   "toll_free_sms_verification": "verified",
   "renewal_date": "2023-05-01",
-  "cnam_lookup": "enabled"
+  "cnam_lookup": "enabled",
+  "cnam": "test1"
 }
diff --git a/tests/Plivo.Test/Mocks/numberListResponse.json b/tests/Plivo.Test/Mocks/numberListResponse.json
index 4d3bbc29..dcc4cf1f 100755
--- a/tests/Plivo.Test/Mocks/numberListResponse.json
+++ b/tests/Plivo.Test/Mocks/numberListResponse.json
@@ -27,7 +27,8 @@
       "tendlc_registration_status": "COMPLETED",
       "toll_free_sms_verification": "verified",
       "renewal_date": "2023-05-01",
-      "cnam_lookup": "enabled"
+      "cnam_lookup": "enabled",
+      "cnam": "test1"
     },
     {
       "added_on": "2013-01-01",
@@ -48,7 +49,8 @@
       "tendlc_registration_status": "COMPLETED",
       "toll_free_sms_verification": "verified",
       "renewal_date": "2023-05-01",
-      "cnam_lookup": "enabled"
+      "cnam_lookup": "enabled",
+      "cnam": "test1"
     },
     {
       "added_on": "2013-03-25",
@@ -69,7 +71,8 @@
       "tendlc_registration_status": "COMPLETED",
       "toll_free_sms_verification": "verified",
       "renewal_date": "2023-05-01",
-      "cnam_lookup": "enabled"
+      "cnam_lookup": "enabled",
+      "cnam": "test1"
     }
   ]
 }
diff --git a/version.json b/version.json
index 128391ac..53269aac 100644
--- a/version.json
+++ b/version.json
@@ -1,5 +1,5 @@
 {
-  "version": "5.30.0",
+  "version": "5.31.0",
   "publicReleaseRefSpec": [
     "^refs/heads/master$",
     "^refs/heads/v\\d+(?:\\.\\d+)?$"