Frequently Asked Questions

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Getting Started Messaging Voice Numbers Pricing/Billing Workflow



What type of messaging services does Zang Cloud provide?

Zang Cloud supports both MMS and SMS messaging. For more information about our messaging services, check out:

What types of messaging apps can I build on Zang Cloud?

You can build applications for customer notifications, authentication, polling & surveying, and much more!
Check out the examples in our helper libraries to kickstart your next app:

What is the character limit for MMS messages and SMS text messages?

The text portion of MMS/SMS messages is limited to 160 characters.

Can I SMS or MMS-enable a ported number?

Yes, ported numbers can be enabled with both SMS and MMS. If you have any questions, please let us know at [email protected] or chat with us via the site messenger.

What type of content can I share in an MMS?

With MMS, you will have the ability to share audio, images, and video with MMS-capable numbers in the US & Canada. We support the following formats:
• Audio: amr, mp3, wav
• Images: jpg, gif, png
• Video: mp4, avi, flv

The media size limit is 5MB. We do not support sending more than one media file in the message body at this time. MMS is currently only supported in the US and Canada.

For more information about the MMS feature, please visit:

What countries support Zang Cloud MMS?

Currently, MMS is only supported in the US and Canada.

What countries do you support for SMS?

To see a list of supported countries, please refer to our global pricing here:

If you see an unsupported country and you’re curious why that’s the case email us at [email protected] or chat with us via the site messenger.

What is SMS concatenation and does Zang Cloud support it?

A standard SMS is limited to 160 characters, yet most mobile devices support the ability to display text messages that are longer than this limit. From a user’s perspective, they’ll see a text greater than 160 characters as a seamless message. In order for this to happen a carrier must support the automatic splitting and concatenation (or stitching together) of text messages.

We support SMS concatenation, which means you don’t have to worry about the length of your text messages. We split up longer text messages (both inbound and outbound) in the background, but your customer will always receive it as one simple SMS.

Can I use a toll-free number to send MMS and SMS text messages?

We support the ability to enable ported toll-free numbers with MMS/SMS and to purchase new toll-free numbers already enabled with MMS and SMS capabilities.

Learn more about our phone numbers here:

Do you support inbound messaging to Zang Cloud numbers?

Yes. SMS and MMS-enabled Zang Cloud numbers have the ability to receive messages.

To see a list of supported countries, please refer to our global pricing here:

Where can I learn how to send an SMS or MMS via Zang Cloud?

After you’ve purchased a Zang Cloud number or enabled your ported number, check out the following links to learn more about sending SMS or MMS messages:
Learn how to send an SMS
Learn how to send an MMS
You can also learn more about SMS/MMS by checking out our helper libraries here:

How many SMS/MMS text messages can I send at a time?

By default, there is a 1 SMS/MMS per second limit on messages. If you need to send SMS/MMS messages at a higher rate, please contact us at [email protected].

What are the default SMS filtering behaviors?

All Zang Cloud numbers that haven't yet had a user supplied SMS request URL set are provided with the following default SMS filtering behaviors:
• If a recipient replies to a Zang Cloud SMS message with STOP, QUIT, or UNSUBSCRIBE, they will no longer receive SMS messages from that number.
• The keywords START, YES, or SUBSCRIBE revert this blocking.
• HELP informs the recipient of the above keywords.

Once an SMS request URL is set, this default behavior stops, allowing developers to implement their own SMS filtering solution.
For more information, check out:

Where can I find the rates for SMS and MMS?

Our messaging rates can be found on our global pricing chart here:

Do you provide short codes?

Yes. You can lease existing, pre-approved shared short codes through Zang Cloud. These shared short codes are provisioned instantly and enable you to bypass the lengthy process of obtaining a dedicated short code.

Although, we’ll also help you through the process of obtaining and deploying dedicated short codes. These are short codes just for your business.

Contact our sales team at [email protected] to get more information or to start the process.

What’s the difference between ‘short codes’ and ‘long codes’?

A long code is simply a unique, 10-digit phone number and is a short code is a 5 or 6 digit number.

Long codes are suited for P2P (Peer-to-Peer) apps that encourage interaction between individuals. In many cases, local regulations (including in the US) require that all P2P communication is established with a long code.

A short code is required for A2P (Application-to-Peer) apps. These types of apps enable a business to send bulk messages to individuals and in many cases is legally required to send mass messages to customers.

Do you offer volume pricing?

Yes. We offer custom pricing plans for high-volume users, so please don't hesitate to contact our sales team at [email protected] to get rates.

Other Questions?

If you still have any other questions remaining, please email us at [email protected] and we’ll be sure to help you answer them!