> For the complete documentation index, see [llms.txt](https://docs.eseye.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.eseye.com/smartconnect/at-command-reference/general-at-commands/creg-request-network-registration-status.md).

# CREG – request network registration status

Verifies the current network registration status of the module. First set the **Mode** to determine which information is displayed, and if it's displayed automatically when a change occurs.

| Type     | Syntax                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | Returned Result                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Test** | `AT+CREG=?`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | <p><code>+CREG: (0-2)</code></p><p><code>OK</code></p>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| **Read** | <p><code>AT+CREG?</code></p><p><strong>Tip:</strong> Perform the Write command first so that you can set the returned details of the Read command.</p>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | <p>The response depends on which mode you selected in the write command.</p><p>The initial number returned is the mode.</p><p>If the mode = 0, the following response occurs:</p><p><code>+CREG: 0,\<regStatus></code></p><p><code>OK</code></p><p>If the mode = 1, the following response occurs:</p><p><code>+CREG: 1,\<regStatus></code></p><p><code>OK</code></p><p>If the mode = 2, the following response occurs:</p><p><code>+CREG: 2,\<regStatus>\[,\<netLac>,\<netCellID>\[,\<AcT>]]</code></p><p>where:</p><ul><li><p><code>\<regStatus></code> is the registration status, either:</p><ul><li><code>0</code> – Not registered, the device is currently not searching for new operator.</li><li><code>1</code> – Registered to home network.</li><li><code>2</code> – Not registered, but the device is currently searching for a new operator.</li><li><code>3</code> – Registration denied.</li><li><code>4</code> – Unknown. For example, out of range.</li><li><code>5</code> – Registered, roaming. The device is registered on a foreign (national or international) network.</li></ul></li><li><code>\<netLac></code> is a two byte location area code in hexadecimal format</li><li><p><code>\<netCellID></code> is the Cell ID in hexadecimal format, either:</p><ul><li>16 bit for 2G</li><li>28 bit for 3G or 4G</li></ul></li><li><p><code>\<AcT></code> is radio access technology, either:</p><ul><li><code>0</code> – GSM</li><li><code>2</code> – UTRAN</li><li><code>3</code> – GSM w/EGPRS</li><li><code>4</code> – UTRAN w/HSDPA</li><li><code>5</code> – UTRAN w/HSUPA</li><li><code>6</code> – UTRAN w/HSDPA and w/HSUPA</li><li><code>7</code> – E-UTRAN</li></ul></li></ul><p>or</p><p><code>ERROR</code> – the command failed.</p> |
| Write    | <p><code>AT+CREG=\<Mode></code></p><p>where <code>\<Mode></code> is either:</p><ul><li><code>0</code> – Disable network registration unsolicited result code. You will need to manually check the network registration status.</li><li><code>1</code> – Enable network registration unsolicited result code. If there is a change in network registration status, the modem will automatically return a response.</li><li><code>2</code> – Enable network registration and location information unsolicited result code. If there is a change in network registration status or at least one of the additional network information elements, the modem will automatically return a response.</li></ul> | <p><code>OK</code> - the network registration status mode is successfully set</p><p><code>ERROR</code> - the command failed</p>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |

{% hint style="info" %}
Factors contributing to SIM failure to register on the network may include:

* Missing network coverage
* Denied network access
* No valid roaming agreement between the home network and currently available operators
  {% endhint %}

#### Example

```
AT+CREG=2
OK
AT+CREG?
+CREG: 2,5,"54DB","0F6B0578",7
OK
```


---

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