---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/11201#article
headline: "11201: TCP connection timed out"
url: https://www.twilio.com/docs/api/errors/11201
inLanguage: en
dateModified: 2026-03-11T18:38:39.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 11201: TCP connection timed out

Log Level: ERROR

## Description

Twilio cannot establish a TCP connection to your web server. The two attempts to connect to your web server were timed out. Each connection attempt has a 5 second timeout.

### Possible causes

* firewall in your network blocking incoming TCP traffic
* network outage between Twilio and your web server
* invalid host part in the HTTP URL pointing to non-existing host or private IP address

### Possible solutions

* verify firewall configuration in your network or on the web server
* verify network connectivity to your web server
* verify the HTTP URL provided is accessible to the public Internet