---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/32220#article
headline: "32220: Specifying an edge is not allowed when dialing SIP registered endpoints"
url: https://www.twilio.com/docs/api/errors/32220
inLanguage: en
dateModified: 2026-04-29T19:18:40.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 32220: Specifying an edge is not allowed when dialing SIP registered endpoints

Log Type: APPLICATION

Log Level: ERROR

## Description

Use the global SIP Domain URI when you call a registered endpoint. Twilio supports localized SIP URIs for device registration, but Twilio does not support dialing a registered endpoint by using an edge-specific domain such as `yourdomain.sip.ashburn.twilio.com`. When you call a registered address of record, Twilio forks the call to all devices registered under the same username and domain.

### Possible causes

* You attempted to place a call to a registered endpoint by using an edge-specific SIP Domain such as `username@yourdomain.sip.ashburn.twilio.com`.
* Your application used another localized edge variant such as `ashburn-ix`, `umatilla`, `dublin`, `frankfurt`, `singapore`, `tokyo`, `sao-paulo`, or `sydney` when dialing the registered endpoint.
* Your application still relies on legacy regional dialing behavior. Twilio allows `us1` and `us1-ix` only for backward compatibility in limited cases, and Twilio recommends removing that dependency.

### Possible solutions

* Dial the registered endpoint by using your global SIP Domain URI, for example `username@yourdomain.sip.twilio.com`.
* Keep using localized SIP URIs only for device registration or network ingress selection, not for the destination URI when you call a registered address of record.
* If you still use legacy `us1` or `us1-ix` behavior, update your calling logic to use the global SIP Domain URI so new calls do not fail with this error.

#### Additional resources

* [SIP Registration](/docs/voice/api/sip-registration)
* [SIP URIs](/docs/global-infrastructure/localized-uris/sip-uris)
* [Regional SIP Domains](/docs/global-infrastructure/regional-sip-domains)