---
title: "Telnyx: Smart Localized Caller IDs"
canonical: https://telnyx.com/release-notes/localized-caller-ids
---
# Telnyx: Smart Localized Caller IDs

[Release notes](https://telnyx.com/release-notes)

# Telnyx: Smart Localized Caller IDs

### 28, Feb 2019

This is the new Caller ID handling behavior for outbound calls to PSTN:

1. If the Caller sends Caller ID with +E164 format, Telnyx passes the Caller ID as is to the PSTN
2. If not, Telnyx checks the localization country for the Callers Connection
3. If the Caller ID includes a Country-Code that matches the localization country, Telnyx adds `+` to it before passing it
4. If not, Telnyx adds `+Country-Code` to the caller ID

[Start building](https://telnyx.com/sign-up)

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