---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/60006#article
headline: "60006: Invalid Phone Number"
url: https://www.twilio.com/docs/api/errors/60006
inLanguage: en
dateModified: 2026-06-08T11:29:20.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 60006: Invalid Phone Number

Log Type: TWILIO

Log Level: ERROR

## Description

Twilio returns this error when a Verify request includes a phone number that is correctly formatted, but a downstream provider identifies it as invalid. This usually means the number is not a valid, active destination even though it was submitted in `E.164` format.

### Possible causes

* The end user entered the wrong phone number.
* The `to` value is formatted correctly, but the number is deactivated, suspended, or in a grace period before reassignment.
* The number is fake, fraudulent, or otherwise cannot be validated by the downstream provider.
* If you use the `sna` channel, the downstream provider cannot confirm that the phone number is valid for the device or SIM involved in the verification.

### Possible solutions

* Ask the user to confirm the phone number before you send the verification. For initial verification flows, display the full phone number so the user can catch typos.
* Store and submit phone numbers in `E.164` format when you create a verification.
* Validate the phone number with Twilio Lookup before you start the verification. Basic Lookup performs phone number validation, and Line Type Intelligence can help you confirm that the destination is a mobile number when your flow requires one.
* Support a backup Verify channel such as `email` for users who cannot complete a phone-number-based verification.
* If you use Silent Network Auth, retry the verification with a channel that does not depend on the phone number.

#### Additional resources

* [Verifications API](/docs/verify/api/verification)
* [Verification Channels](/docs/verify/authentication-channels)
* [Lookup v2 Quickstart](/docs/lookup/quickstart)