---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/63036#article
headline: "63036: The specified phone number cannot be reached using RCS at this time."
url: https://www.twilio.com/docs/api/errors/63036
inLanguage: en
dateModified: 2026-03-11T22:03:37.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 63036: The specified phone number cannot be reached using RCS at this time.

Log Type: APPLICATION

Log Level: ERROR

## Description

The specified phone number cannot be reached using RCS at this time.

### Possible causes

* Device is switched off
* Device does not have an internet connection
* Device is not RCS Business Messaging capable

### Possible solutions

Turn on the device, connect to internet, and enable RCS and RCS Business Messaging if the device is running iOS ([more details](https://help.twilio.com/articles/29076535334043-RCS-Messaging-Best-Practices-and-FAQ))