---
page_type: error
code: 13255
message: "13255: Dialing .sip.twilio.com addresses is not currently allowed"
level: WARNING
---

# Warning - 13255

### Dial->Sip: Dialing .sip.twilio.com addresses is not currently allowed

At this time internal routing of SIP calls within Twilio is not supported i.e. dialing .sip.twilio.com addresses from a Twilio number.