---
title: "Calling Limitations to China"
slug: "calling-limitations-to-china"
updated: 2023-09-07T14:40:17Z
published: 2023-09-07T14:40:17Z
canonical: "docs.natterbox.com/calling-limitations-to-china"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.natterbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Calling Limitations to China

Regulations laid out by the Chinese [Ministry of Industry and Information Technology (MIIT)](https://en.wikipedia.org/wiki/Ministry_of_Industry_and_Information_Technology) mean that calls to China risk being blocked for a number of reasons.

The rules laid out by MIIT are as follows:

- Calls must be greater than 3 minutes in duration
- Unsolicited marketing calls are not allowed
- Repeat calls from the same number in a rolling hour are not allowed
- Calls from invalid, modified and spoofed numbers as well as those from restricted origination are not allowed
- Calls to China cannot be made using a Chinese number

Non-adherence to these rules will result in calls being blocked without notice, though conversely it is not possible to guarantee that adherence to them will necessarily guarantee their success.

*Please note that the monitoring process is conducted by MIIT and therefore means that Natterbox is unable to control which traffic passes through successfully or is blocked.*