diff --git a/packages/backend/src/apps/signalwire/actions/send-sms/index.ts b/packages/backend/src/apps/signalwire/actions/send-sms/index.ts
index 5ce3d379..0c6db616 100644
--- a/packages/backend/src/apps/signalwire/actions/send-sms/index.ts
+++ b/packages/backend/src/apps/signalwire/actions/send-sms/index.ts
@@ -8,11 +8,21 @@ export default defineAction({
     {
       label: 'From Number',
       key: 'fromNumber',
-      type: 'string' as const,
+      type: 'dropdown' as const,
       required: true,
       description:
         'The number to send the SMS from. Include only country code. Example: 491234567890',
       variables: true,
+      source: {
+        type: 'query',
+        name: 'getDynamicData',
+        arguments: [
+          {
+            name: 'key',
+            value: 'listIncomingPhoneNumbers',
+          },
+        ],
+      },
     },
     {
       label: 'To Number',
diff --git a/packages/backend/src/apps/signalwire/dynamic-data/index.ts b/packages/backend/src/apps/signalwire/dynamic-data/index.ts
new file mode 100644
index 00000000..d20d4347
--- /dev/null
+++ b/packages/backend/src/apps/signalwire/dynamic-data/index.ts
@@ -0,0 +1,3 @@
+import listIncomingPhoneNumbers from './list-incoming-phone-numbers';
+
+export default [listIncomingPhoneNumbers];
diff --git a/packages/backend/src/apps/signalwire/dynamic-data/list-incoming-phone-numbers/index.ts b/packages/backend/src/apps/signalwire/dynamic-data/list-incoming-phone-numbers/index.ts
new file mode 100644
index 00000000..b5f4a97e
--- /dev/null
+++ b/packages/backend/src/apps/signalwire/dynamic-data/list-incoming-phone-numbers/index.ts
@@ -0,0 +1,58 @@
+import { IGlobalVariable, IJSONObject } from '@automatisch/types';
+
+type TAggregatedResponse = {
+  data: IJSONObject[];
+  error?: IJSONObject;
+};
+
+type TResponse = {
+  incoming_phone_numbers: TIncomingPhoneNumber[];
+  next_page_uri: string;
+};
+
+type TIncomingPhoneNumber = {
+  capabilities: {
+    sms: boolean;
+  };
+  sid: string;
+  friendly_name: string;
+  phone_number: string;
+};
+
+export default {
+  name: 'List incoming phone numbers',
+  key: 'listIncomingPhoneNumbers',
+
+  async run($: IGlobalVariable) {
+    let requestPath = `/api/laml/2010-04-01/Accounts/${$.auth.data.accountSid}/IncomingPhoneNumbers`;
+
+    const aggregatedResponse: TAggregatedResponse = {
+      data: [],
+    };
+
+    do {
+      const { data } = await $.http.get<TResponse>(requestPath);
+
+      const smsCapableIncomingPhoneNumbers = data.incoming_phone_numbers
+        .filter((incomingPhoneNumber) => {
+          return incomingPhoneNumber.capabilities.sms;
+        })
+        .map((incomingPhoneNumber) => {
+          const friendlyName = incomingPhoneNumber.friendly_name;
+          const phoneNumber = incomingPhoneNumber.phone_number;
+          const sid = incomingPhoneNumber.sid;
+          const name = [friendlyName, phoneNumber].filter(Boolean).join(' - ');
+
+          return {
+            value: sid,
+            name,
+          };
+        })
+      aggregatedResponse.data.push(...smsCapableIncomingPhoneNumbers)
+
+      requestPath = data.next_page_uri;
+    } while (requestPath);
+
+    return aggregatedResponse;
+  },
+};
diff --git a/packages/backend/src/apps/signalwire/index.ts b/packages/backend/src/apps/signalwire/index.ts
index 9d187669..658a9a90 100644
--- a/packages/backend/src/apps/signalwire/index.ts
+++ b/packages/backend/src/apps/signalwire/index.ts
@@ -3,6 +3,7 @@ import addAuthHeader from './common/add-auth-header';
 import auth from './auth';
 import triggers from './triggers';
 import actions from './actions';
+import dynamicData from './dynamic-data';
 
 export default defineApp({
   name: 'SignalWire',
@@ -17,4 +18,5 @@ export default defineApp({
   auth,
   triggers,
   actions,
+  dynamicData,
 });
diff --git a/packages/backend/src/apps/signalwire/triggers/receive-sms/index.ts b/packages/backend/src/apps/signalwire/triggers/receive-sms/index.ts
index 3398d9a0..896244fa 100644
--- a/packages/backend/src/apps/signalwire/triggers/receive-sms/index.ts
+++ b/packages/backend/src/apps/signalwire/triggers/receive-sms/index.ts
@@ -10,10 +10,20 @@ export default defineTrigger({
     {
       label: 'To Number',
       key: 'toNumber',
-      type: 'string',
+      type: 'dropdown',
       required: true,
       description:
         'The number to receive the SMS on. It should be a SignalWire number in your project.',
+      source: {
+        type: 'query',
+        name: 'getDynamicData',
+        arguments: [
+          {
+            name: 'key',
+            value: 'listIncomingPhoneNumbers',
+          },
+        ],
+      },
     },
   ],