---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/32201#article
headline: "32201: SIP: Source IP address not in ACL"
url: https://www.twilio.com/docs/api/errors/32201
inLanguage: en
dateModified: 2026-03-11T20:01:16.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 32201: SIP: Source IP address not in ACL

Log Type: APPLICATION

Log Level: ERROR

## Description

### Possible causes

* Authorization failure - source IP Address not in ACL (Access Control List).

### Possible solutions

* There is an ACL on your trunk and you are sending us INVITE requests from an IP address not on that ACL. Either fix local routing so that you are sending us SIP from an address already in your ACL or add this other address to your ACL.