[Yandex Cloud documentation](../../index.md) > [Yandex Cloud Notification Service](../index.md) > [Concepts](index.md) > Quotas and limits

# Yandex Cloud Notification Service quotas and limits

Cloud Notification Service has the following limitations:

* [_Quotas_](https://console.yandex.cloud/cloud?section=quotas) are organizational constraints that can be changed by contacting technical support.
* _Limits_ are technical constraints of the Yandex Cloud architecture. You cannot change the limits.

If you need more resources, you can increase your quotas in one of the following ways:

* [Make a request to increase your quotas](https://console.yandex.cloud/cloud?section=quotas).
* Contact [support](https://center.yandex.cloud/support) and specify which quotas you want increased and by how much.

To have your request processed, you must have the `quota-manager.requestOperator` [role](../../iam/roles-reference.md#quota-manager-requestoperator) or higher, e.g., `editor` or `admin`.

You can manage your quotas with [Cloud Quota Manager](../../quota-manager/quickstart.md).

#### Quotas {#cns-quotas}

#|
|| Type of limit | Value ||
|| Number of SMS to send per month 
`notifications.smsPerMonth.rate` | 100 ||
|#

#### Limits {#limits}

**Type of limit** | **Value**
----- | -----
Maximum number of [mobile push notification channels](push.md#mobile-channel) per cloud | 20
Maximum number of [in-browser push notification channels](browser.md) per cloud | 10
Maximum number of [SMS notification](sms.md) channels per cloud | 10
Maximum number of SMS notification channels with a [shared sender](sms.md#common-sender) per cloud | 1
Maximum number of SMS notification channels with an [individual sender](sms.md#individual-sender) per cloud | 10
Maximum number of [test phone numbers](sms.md#sandbox) per SMS notification channel | 10
Maximum number of [templates](sms.md#templates) per SMS notification channel | 20
Maximum [mobile push notification](push.md) message size | 4 KB
Maximum [browser push notification](browser.md) message size | 3 KB
Maximum SMS message length | 1,600 characters (10 segments)
Maximum name length for a push notification channel | 40 characters
Maximum length for user data (`CustomUserData`) per mobile endpoint | 256 characters
Maximum length for a device ID per mobile endpoint | 256 characters
Maximum rate of requests to create or update notification channel attributes per cloud | 30 requests per second
Maximum rate of requests to send an SMS message per cloud | 20 requests per second
Maximum number of SMS messages to verify one test number | 5 per day for one number
Maximum number of SMS messages to verify test numbers per cloud | 20 per day
Maximum number of topics per cloud | 1,000
Maximum number of subscriptions per topic | 1,000

All quotas and limits apply to the cloud.