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Release notes

Stay updated as we add new functionality to Bandwidth.

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January 23, 2023 Phone Numbers Global Coverage Global Portal

Now a global carrier in Turkey

We are excited to announce the availability of our Public Switched Telephone Network (PSTN) replacement service in Turkey for multinational enterprises and global service providers.

Reach out to your account manager to begin purchasing Turkish local numbers and toll-free numbers for inbound, outbound, and emergency services.

January 18, 2023 Voice Bandwidth Dashboard

Introducing self-service Voice Insights

We are now able to offer self-service Voice Insights. This new self-service tool offers up to 30 days of call data including: SIP errors, estimated cost, attestation level, call state, and call volumes on specific numbers.

For more information on Voice Insights, check out our support article.

January 18, 2023 API Bandwidth Dashboard

Removal of HTTP reason phrase

Beginning March 1, 2023, the Bandwidth Dashboard API will no longer guarantee that the HTTP reason phrase will be sent on responses to API requests. This is in accordance with the HTTP standard (RFC 9110, Section 15.1).

This change means that a response that used to look like this:


HTTP/1.1 200 OK


Will now return this:


HTTP/1.1 200 


Please verify that your apps do not use the reason phrase when processing responses from our API in advance of March 1.

January 10, 2023 Phone Numbers Global Portal

Introducing Global Number Hosting

Beginning January 11, 2023, we are offering Global Number Hosting for geographic, national and toll-free numbers in France. This service will allow you to provision numbers on the Bandwidth network that you have obtained from ARCEP, the French regulator. When hosting your own numbers, you will be able to leverage our interconnected network and robust number management experience while maintaining ownership of the number in accordance with local regulations. 

For more information, check out our FAQ. To contract for Global Number Hosting, reach out to your account manager.

January 4, 2023 Bandwidth Dashboard

New file type restrictions

In order to improve security and reliability, we are limiting the types of file uploads we support for both port-in documents and import TN documents. We are also adding validation to ensure that the content-type header, the file type extension, and the MIME-type are consistent with each other.


Effective March 2, 2023, Bandwidth will allow only the following types of files to be uploaded:

  • CSV (“text/csv”)
  • DOC (“application/msword”)
  • DOCX (“application/vnd.openxmlformats-officedocument.wordprocessingml.document”)
  • JPG/JPEG (“image/jpeg”)
  • PDF (“application/pdf”)
  • PNG (“image/png”)
  • TXT (“text/plain”)
  • TIFF (“image/tiff”)
  • XLS (“application/”)
  • XLSX (“application/vnd.openxmlformats-officedocument.spreadsheetml.sheet”)


If you have any questions regarding this upcoming change, reach out to your Bandwidth Support Team!

December 19, 2022 Messaging API Bandwidth Dashboard

HTTP header case changes

On January 6, 2023, we will perform a messaging release that may cause changes to the letter case of HTTP headers within HTTP responses and callbacks. For instance, the “Content-Type” header may be changed to “content-type.”

Please validate that your applications are parsing these headers in a case-insensitive fashion in accordance with RFC 9110.

November 30, 2022 Phone Numbers API

Introducing Global Number Ordering

Beginning November 30, 2022, Bandwidth is offering global customers the ability to search and order specific numbers or consecutive number ranges using the Global Portal API. Numbers can be held in the customer’s cart for a maximum of 10 minutes. For more information, view our API docs.

November 21, 2022 911 Access

IP Traffic Consolidation

As of November 14, 2022, IP Traffic Consolidation now allows for the dynamic handling of emergency call routing types, allowing customers to send any route type (static VoIP, PIDF-LO, lat-lon (X/Y), and Microsoft Teams) down any SIP trunk associated with opted-in accounts.

To enable IP Traffic Consolidation, contact your account manager.

September 23, 2022 Messaging API

New messaging error codes

Three new messaging error codes are being created and will take effect by September 30, 2022:

  • volumetric-violation
    • SMPP/MM4: 785 
    • API: 4785
  • tfn-not-verified 
    • SMPP/MM4: 795 
    • API: 4795
  • media-content-invalid 
    • SMPP/MM4: 712 
    • API: 4712

Please review our full list of SMPP SMS Delivery Receipts and Error Codes and Messaging API HTTP Error Codes for more details.

July 28, 2022 911 Access Bandwidth Dashboard

911 Dynamic Location Routing (DLR) notifications

Beginning August 2, 2022, Bandwidth is enhancing the emergency notification provisioning capabilities to allow customers to manage notification recipients within the US & Canada Portal. This update allows customers to add, edit, and delete single notification recipients or create a group of up to three recipients associated with one or multiple endpoints, all within the portal. 

Please reach out to your account manager if you would like this feature added to your account.”

For more information, please view our Support Center guide.

June 30, 2022 Voice

Bandwidth is now supporting 988 for suicide prevention

Effective June 27, 2022, Bandwidth will support 988 as the number for the National Suicide Prevention Lifeline. 


Customers may need to adjust their dial plan to support 988 in order to comply with FCC rules to establish 988 as the nationwide 3-digit dialing code for Americans in crisis by July 16, 2022

For more information, view our 988 dialing announcement.

June 27, 2022 Messaging API Bandwidth Dashboard

Messaging Error Code Updates

Three messaging error codes are being updated on July 6, 2022:

  • volume-violation-tmo
    • SMPP: 780
    • API: 4780
  • volume-violation-att
    • SMPP: 781
    • API: 4781
  • rejected-shortened-url
    • SMPP: 771
    • API: 4771

Please review our full list of SMPP SMS Delivery Receipts and Error Codes and Messaging API HTTP Error Codes for more details.

June 27, 2022 Voice API

Adding tone detection to Answering Machine Detection

Effective July 1, 2022, a tone detection enhancement to our Answering Machine Detection (AMD) feature will be available. This will enable the application to detect answering machine tones, thus allowing the application to better time when to leave a message. 


This will be enabled for all accounts on October 1, 2022. Customers can contact their account manager or customer service manager if they would like it to be enabled before October 1. There is no additional charge for tone detection.

The tone detection addition will indicate a tone by returning a new machineDetectionResult value of “tone-detected” in machineDetectionComplete webhook. This value will only be returned if Answering Machine Detection is invoked with delayResult set to true.

June 27, 2022 Voice API

New Programmable Voice call modification endpoint

We have introduced a new call modification endpoint that makes it easier for customers to pass BXML on an active call by directly calling the new API endpoint with the new BXML.

For more information, check out our API docs on how to Modify Calls with BXML or our guide on how to Modify Calls in Progress.

June 23, 2022 Phone Numbers API

Introducing Global Number Selection

Starting June 23, 2022, Bandwidth is offering customers the ability to view telephone numbers prior to purchase through an advanced search in the Global Portal API. For more information, view our API docs.

April 18, 2022 Global Portal

Update sub-account privileges

Beginning July 15, 2022, Bandwidth is requiring Voxbone Portal users to explicitly select user privileges within sub-accounts to continue API accessIn order for sub-accounts to be able to continue making API calls to these endpoints, users will need to have the following privileges set via the Voxbone Portal:


/configuration  – “Configuration” privilege required

/regulation – “Regulation” privilege required

/inventory  – “Ordering” or “Configuration” privilege required

/ordering – “Ordering” privilege required

March 29, 2022 Voice API

Introducing Outbound Call Queueing

Bandwidth is enabling Outbound Call Queueing for Voice API customers on April 30, 2022.

Before, if customers exceeded their calls per second (CPS) rate, any calls over that limit were rejected. Instead of rejecting those calls, Outbound Call Queueing places them into a queue to be completed based on the customer’s CPS limits.

February 24, 2022 Messaging Phone Numbers API Bandwidth Dashboard

Capping TNs for 10DLC Campaigns

The number of TNs that can be associated with a single 10DLC Campaign is now limited to 49, unless the customer has been approved for a Sub ID. The limit of 49 TNs is consistent with T-Mobile’s policy. Customers will receive an error message when adding 50 or greater TNs.

February 24, 2022 Phone Numbers Bandwidth Dashboard

Bandwidth Dashboard Final Destination URI

Effective February 23, 2022, failover/ final destination URIs will be added as a Bandwidth Dashboard functionality. These URIs allow calls to be sent to a backup route in the event that the usual call route fails. Learn more here.

January 28, 2022 Messaging API Bandwidth Dashboard

Message search API update; 429 error codes

Beginning February 7, 2022, we’re updating message search API so that users receive 429 error codes when rate limits are exceeded.