How to avoid carrier filtering

Learn about best practices to avoid carrier filtering

David Stupek avatar
Written by David Stupek
Updated over a week ago

πŸ‘‰ Register Your 10DLC Number πŸ‘ˆ

Carrier filtering is what happens when your contacts carrier networks identify your traffic as spam. You will send a message to a contact, but it will result in a message error "Carrier Violation 30007".

Register all of your 10DLC phone numbers now to avoid these penalties:

  • June 1, 2023: AT&T and T-Mobile will increase carrier fees for unregistered messages.

  • July 5, 2023: Gradual message blocking begins on US-bound messages.

  • After August 31, 2023: all messages sent from unregistered 10DLC phone numbers to US numbers will be blocked.

Unregistered numbers will be subject to gradually increased rates of message blocking, beginning on July 5, 2023, ultimately leading to a full block of all unregistered US-bound messages sent after August 31, 2023. These messages will be blocked with a new β€˜30034’ error.

Prevention With Behavior

People are likely to report confusing or unwanted texts to their carriers. We put together a few tips to help you avoid carriers filtering your messages.Β 

  1. Make sure your contacts opt-in via the affected SMS channel. (Or at least opted-in to receive messages from your organization)

  2. Make sure that any existing contacts are reminded that they can opt-out periodically. (once the first time and again monthly is perfect)

  3. Introduce yourself and your Organization in your initial message.

  4. Make sure that you are sending links that are not part of bitly. (or other public URL Shorteners)

  5. If there are specific message templates that are getting flagged, please alter the wording so that it looks like a different message.

  6. If a user asks to be removed from your SMS list but does not invoke a keyword like "STOP" opt them out manually to ensure they are off your list.

  7. Validate your phone numbers to reduce the number of times you would message a landline or another number that can not take an SMS message.

Application to Person - 10 Digit Long Code (A2P 10DLC)

US Customers Only

A2P 10DLC is a registration that all Salesmsg users have. If you've never filled out the registration you are on 10DLC Starter.
If you have submitted information in app or to a Salesmsg agent you're on Standard or pending A2P 10DLC Standard registration.
This registration is specifically for 10 digit long code phone numbers, like a normal ten digit long local phone number. Once you have greater than 1 local phone numbers or you are averaging > 3,000 message segments a day you'll be required to register for 10DLC Standard.
If you qualify for Standard but are not on Standard registering will mitigate instances of carrier filtering.

Verified Toll Free Number

A verified toll free line, is a means to validate a phone numbers traffic without 10DLC (which is only for 10 digit local area code numbers). This option is strictly for toll-free numbers but is effective for mitigating carrier violation problems.

To learn more, check out our webinar about toll-free number compliance.

Frequently Asked Questions

What if my message was not delivered and I received an error?
Review this article to help you Troubleshoot message errors.

How do I know if my messages are being filtered by a carrier?
In most cases, you will notice your message was delivered to your contacts, but there may be a couple of contacts who did not receive your message. Remember to hover over the error to learn why your message was not delivered.

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