diff --git a/packages/backend/src/apps/twilio/common/get-incoming-phone-number.ts b/packages/backend/src/apps/twilio/common/get-incoming-phone-number.ts
new file mode 100644
index 00000000..53abbe09
--- /dev/null
+++ b/packages/backend/src/apps/twilio/common/get-incoming-phone-number.ts
@@ -0,0 +1,14 @@
+import { IGlobalVariable } from "@automatisch/types";
+
+type Response = {
+  sid: string;
+  phone_number: string;
+};
+
+export default async function getIncomingPhoneNumber($: IGlobalVariable) {
+  const phoneNumberSid = $.step.parameters.phoneNumberSid as string;
+  const path = `/2010-04-01/Accounts/${$.auth.data.accountSid}/IncomingPhoneNumbers/${phoneNumberSid}.json`;
+  const response = await $.http.get<Response>(path);
+
+  return response.data;
+};
diff --git a/packages/backend/src/apps/twilio/triggers/receive-sms/fetch-messages.ts b/packages/backend/src/apps/twilio/triggers/receive-sms/fetch-messages.ts
index 974d3007..f6c7228a 100644
--- a/packages/backend/src/apps/twilio/triggers/receive-sms/fetch-messages.ts
+++ b/packages/backend/src/apps/twilio/triggers/receive-sms/fetch-messages.ts
@@ -1,10 +1,11 @@
 import { IGlobalVariable, IJSONObject } from '@automatisch/types';
+import getIncomingPhoneNumber from '../../common/get-incoming-phone-number';
 
 const fetchMessages = async ($: IGlobalVariable) => {
-  const toNumber = $.step.parameters.toNumber as string;
+  const incomingPhoneNumber = await getIncomingPhoneNumber($);
 
   let response;
-  let requestPath = `/2010-04-01/Accounts/${$.auth.data.accountSid}/Messages.json?To=${toNumber}`;
+  let requestPath = `/2010-04-01/Accounts/${$.auth.data.accountSid}/Messages.json?To=${incomingPhoneNumber.phone_number}`;
 
   do {
     response = await $.http.get(requestPath);