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A2P 10DLC Registration Campaign (Use Case) Types

The tables below show Campaign Types that have become available since the new A2P 10DLC registration was launched for AT&T in the US on April 1, 2021.

Written by: Kanasu Nagathihalli
Created: 2021-03-25

Is there a way to block an incoming SMS on a phone number?

Unlike voice, there is no way to block specific SMS messages on a phone number.

Written by: Kanasu Nagathihalli
Created: 2021-03-18

Can my SMS Messages or Phone Numbers be Blocked as Spam?

Yes. Recipient wireless carriers always reserve the right to filter out incoming SMS and MMS messages from certain numbers.

Written by: Kanasu Nagathihalli
Created: 2021-03-22

Can my SMS messages arrive in order?

SIPSTACK cannot guarantee that SMS messages sent from your SIPSTACK phone number will arrive in order.

Written by: Kanasu Nagathihalli
Created: 2021-04-07

Can SIPSTACK numbers receive SMS from a short code?

By default, SIPSTACK long code numbers cannot receive messages from short code numbers.

Written by: Kanasu Nagathihalli
Created: 2021-05-26

Capabilities of long code, short code, and toll-free phone numbers in Canada and U.S.

This guide explains the capabilities and key differences between long code, short code, and toll-free phone numbers in Canada and US.

Written by: Kanasu Nagathihalli
Created: 2021-04-20

Carrier support for PDF files sent using SIPSTACK MMS

SIPSTACK MMS messaging is a popular way to send media files, especially images, to end users in Canada and US.

Written by: Kanasu Nagathihalli
Created: 2021-04-22

Delivery order of multiple media files via MMS

Multiple media files can be sent as part of one MMS message.

Written by: Kanasu Nagathihalli
Created: 2021-04-07

Does the recipient of my SIPSTACK message get charged?

SIPSTACK will only charge your SIPSTACK account for sending messages through our API.

Written by: Kanasu Nagathihalli
Created: 2021-04-13

Does SIPSTACK check if phone numbers can receive SMS?

SIPSTACK API has basic phone number validation logic built into it.

Written by: Kanasu Nagathihalli
Created: 2021-04-21

Does SIPSTACK support concatenated SMS messages

Messages over 160 characters are concatenated or broken up into multiple messages and transmitted separately.

Written by: Kanasu Nagathihalli
Created: 2021-05-19

Can SIPSTACK SMS send and receive emoji?

SIPSTACK will do the best we can to ensure that the emoji in your message is delivered to your mobile carrier.

Written by: Kanasu Nagathihalli
Created: 2021-04-07

Forbidden message categories for toll-free SMS and MMS in Canada and US

The following messaging use cases are not allowed on toll-free SMS or MMS in Canada and US.

Written by: Kanasu Nagathihalli
Created: 2021-04-15

Handling Deactivated Phone Numbers

This article describes best practices that should be followed while dealing with deactivated phone numbers, including how to find out if a phone number has been deactivated and how to deal with deactivated phone numbers.

Written by: Kanasu Nagathihalli
Created: 2021-03-24

How to use toll-free phone numbers for SMS and MMS in Canada

Toll-free numbers are designated for business messaging use by most major mobile carriers in Canada (Rogers, Fido, Telus and Videotron) and by all major carriers in the US.

Written by: Kanasu Nagathihalli
Created: 2021-04-19

Is MMS supported for all carriers in Canada and US?

Carrier support for MMS messages varies, and is dependent on the receiving carrier.

Written by: Kanasu Nagathihalli
Created: 2021-05-18

How much does it cost to send and receive an MMS message over long codes?

SIPSTACK currently offers MMS messaging over Canada and US long code phone numbers.

Written by: Kanasu Nagathihalli
Created: 2021-03-31

MMS on my toll free phone number?

Yes, as of February 2021, all Canada/US toll-free numbers purchased through SIPSTACK can send/receive MMS messages to and from end users in Canada and US

Written by: Kanasu Nagathihalli
Created: 2021-03-31

Why are my MMS messages being sent as SMS text messages?

When you attempt to send an MMS message from a SIPSTACK MMS-enabled number to a recipient on a carrier that does not support MMS

Written by: Kanasu Nagathihalli
Created: 2021-04-04

Opt-out keyword handling for toll-free SMS

Toll-free SMS is a great way to send messages to recipients in Canada and US.

Written by: Kanasu Nagathihalli
Created: 2021-03-31

Can Canadian and US phone numbers receive international SMS messages?

It is entirely dependent on the capabilities of that phone number.

Written by: Kanasu Nagathihalli
Created: 2021-03-24

How do I register my business under the new A2P 10DLC regulations?

A2P 10DLC refers to a system that allows businesses to send Application-to-Person (A2P) type messaging via standard 10-digit long code (10DLC) phone numbers.

Written by: Kanasu Nagathihalli
Created: 2021-03-18

Sending and receiving MMS messages

A2P 10DLC refers to a system that allows businesses to send Application-to-Person (A2P) type messaging via standard 10-digit long code (10DLC) phone numbers.

Written by: Kanasu Nagathihalli
Created: 2021-04-28

Size limitations of combining text and images

If you're sending text and images in the same SMS, the message can contain up to 10 images and 1600 characters, as long as the entire message is under 5 MB.

Written by: Kanasu Nagathihalli
Created: 2021-04-07

SMS Carrier Filtering in Canada and US

This guide discusses how SMS filtering by different wireless carriers in Canada and US can affect delivery of your programmable SIPSTACK SMS messages

Written by: Kanasu Nagathihalli
Created: 2021-04-21

Can I send SMS messages to roaming phone numbers?

SIPSTACK cannot guarantee the deliverability of SMS messaging to roaming phone numbers.

Written by: Kanasu Nagathihalli
Created: 2021-04-14

Can I use SIPSTACK SMS messaging for emergency purposes?

No, you should not rely on SIPSTACK's programmable SMS during emergency situations.

Written by: Kanasu Nagathihalli
Created: 2021-03-31

What kind of messages are restricted on SIPSTACK SMS?

SIPSTACK provides you with a platform to send and receive SMS messages to phone numbers around the world. However, SIPSTACK may suspend your account if you violate our Acceptable Use Policy (AUP).

Written by: Kanasu Nagathihalli
Created: 2021-04-07

Can I send or receive SMS with a SIPSTACK toll-free phone number?

Yes. SIPSTACK toll-free numbers support two-way SMS (sending and receiving text messages) within Canada and US, and one-way SMS to other countries.

Written by: Kanasu Nagathihalli
Created: 2021-04-14

SIPSTACK support for opt-out keywords

If a customer responds to a message from a SIPSTACK long code or toll-free phone number with any of the following keywords

Written by: Kanasu Nagathihalli
Created: 2021-05-25

What MMS content types does SIPSTACK support?

You can send text, audio, video, image and application content over SIPSTACK MMS. However, whether these messages are received depends on the carrier and device of the end user.

Written by: Kanasu Nagathihalli
Created: 2021-04-07

How do Trust Scores for A2P 10DLC in the US affect Message Throughput?

According to the new A2P 10DLC regulation in the US, your message throughput will now be determined by your Trust Score and your Campaign type.

Written by: Kanasu Nagathihalli
Created: 2021-03-18

What is a Message SSID?

Every message successfully created by SIPSTACK API generates a unique SSID.

Written by: Kanasu Nagathihalli
Created: 2021-04-01

What is a Messaging Short Code?

A short code is a 5 or 6-digit number that can send and receive SMS (and MMS) to and from mobile phones.

Written by: Kanasu Nagathihalli
Created: 2021-05-26

What is A2P 10DLC?

A2P 10DLC refers to a system that allows businesses to send Application-to-Person (A2P) type messaging via standard 10-digit long code (10DLC) phone numbers.

Written by: Kanasu Nagathihalli
Created: 2021-03-03

What is A2P and P2P Messaging?

Programmable SMS Text Messaging generally falls within one of two categories: A2P and P2P messaging.

Written by: Kanasu Nagathihalli
Created: 2021-03-18

Will I be charged if SIPSTACK encounters an error when sending an SMS?

SIPSTACK will not charge you for a message if your API request returns an HTTP error, or if the message status on SIPSTACK is failed.

Written by: Kanasu Nagathihalli
Created: 2021-05-07

Will SIPSTACK automatically resize my images for MMS messaging?

Yes, SIPSTACK will automatically resize supported images file types (.png, .gif, and .jpg) to the necessary size for delivery based on carrier specifications.

Written by: Kanasu Nagathihalli
Created: 2021-04-07