diff --git a/lib/resources/numbers.js b/lib/resources/numbers.js
index 0d613efc..1b78290b 100644
--- a/lib/resources/numbers.js
+++ b/lib/resources/numbers.js
@@ -21,6 +21,12 @@ export class BuyNumberResponse {
         this.status = params.status;
         this.message = params.message;
         this.statusCode = statusCode;
+        if (params.newCnam) {
+          this.new_cnam = params.newCnam;
+        }
+        if (params.cnamUpdateStatus) {
+          this.cnam_update_status = params.cnamUpdateStatus;
+        }
     }
 }
 
@@ -53,6 +59,12 @@ export class UpdateNumberResponse {
         params = params || {};
         this.apiId = params.apiId;
         this.message = params.message;
+        if (params.newCnam) {
+          this.new_cnam = params.newCnam;
+        }
+        if (params.cnamUpdateStatus) {
+          this.cnam_update_status = params.cnamUpdateStatus;
+        }
     }
 }
 
@@ -79,13 +91,16 @@ export class PhoneNumber extends PlivoResource {
      * @method
      * @param {string} appId - app id
      * @param {string} cnamLookup - cnam lookup
+     * @param {string} cnam - cnam attached to number
+     * @param {string} callback_method - callback_method Method to call the url for attaching cnam
+     * @param {string} callback_url - callback_url url to attach the cnam
      * @promise {@link PlivoGenericResponse} return PlivoGenericResponse Object if success
      * @fail {Error} return Error
      */
-    buy(number,appId,cnamLookup) {
+    buy(number,appId,cnamLookup,cnam,callback_method,callback_url) {
         return new PhoneNumberInterface(this[clientKey], {
             id: this.id
-        }).buy(number,appId,cnamLookup);
+        }).buy(number,appId,cnamLookup,cnam,callback_method,callback_url);
     }
 }
 
@@ -109,10 +124,12 @@ export class PhoneNumberInterface extends PlivoResourceInterface {
      * @method
      * @param {string} appId - app id
      * @param {string} cnamLookup - cnam lookup
-     * @promise {@link PlivoGenericResponse} return PlivoGenericResponse Object if success
+     * @param {string} cnam - cnam attached to number
+     * @param {string} callback_method - callback_method Method to call the url for attaching cnam
+     * @param {string} callback_url - callback_url url to attach the cnam* @promise {@link PlivoGenericResponse} return PlivoGenericResponse Object if success
      * @fail {Error} return Error
      */
-    buy(number, appId,cnamLookup) {
+    buy(number, appId,cnamLookup, cnam, callback_method, callback_url) {
         let params = {};
         if (appId) {
             params.app_id = appId;
@@ -120,6 +137,15 @@ export class PhoneNumberInterface extends PlivoResourceInterface {
         if (cnamLookup) {
           params.cnam_lookup = cnamLookup;
         }
+        if (cnam) {
+          params.cnam = cnam;
+        }
+        if (callback_url) {
+          params.callback_url = callback_url;
+        }
+        if (callback_method) {
+          params.callback_method = callback_method;
+        }
         let client = this[clientKey];
 
         return new Promise((resolve, reject) => {
@@ -179,6 +205,9 @@ export class NumberResource extends PlivoResource {
      * @param {string} [params.subAccount] - auth_id of subaccount
      * @param {string} [params.alias] - textual name of number
      * @param {string} [params.cnamLookup] - cnam lookup of number
+     * @param {string} [params.cnam] - cnam attached to number
+     * @param {string} [params.callback_method] - callback_method Method to call the url for attaching cnam
+     * @param {string} [params.callback_url] - callback_url url to attach the cnam
      * @promise {@link NumberResource} return NumberResource Object if success
      * @fail {Error} return Error
      */
@@ -225,10 +254,13 @@ export class NumberInterface extends PlivoResourceInterface {
      * @param {string} number - number to buy
      * @param {string} appId - app id
      * @param {string} cnamLookup - cnam lookup
+     * @param {string} cnam - cnam attached to number
+     * @param {string} callbackMethod - callback_method Method to call the url for attaching cnam
+     * @param {string} callbackUrl - callback_url url to attach the cnam
      * @promise {@link PlivoGenericResponse} return PlivoGenericResponse Object if success
      * @fail {Error} return Error
      */
-    buy(number, appId, cnamLookup) {
+    buy(number, appId, cnamLookup, cnam, callbackMethod, callbackUrl ) {
         let errors = validate([{
             field: 'number',
             value: number,
@@ -240,7 +272,7 @@ export class NumberInterface extends PlivoResourceInterface {
         }
         return new PhoneNumber(this[clientKey], {
             id: number
-        }).buy(number, appId, cnamLookup);
+        }).buy(number, appId, cnamLookup, cnam, callbackMethod, callbackUrl);
     }
 
     /**
@@ -325,6 +357,9 @@ export class NumberInterface extends PlivoResourceInterface {
      * @param {string} [params.subAccount] - auth_id of subaccount
      * @param {string} [params.alias] - textual name of number
      * @param {string} [params.cnamLookup] - cnam lookup of number
+     * @param {string} [params.cnam] - cnam attached to number
+     * @param {string} [params.callback_method] - callback_method Method to call the url for attaching cnam
+     * @param {string} [params.callback_url] - callback_url url to attach the cnam
      * @promise {@link NumberResource} return NumberResource Object if success
      * @fail {Error} return Error
      */