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US SMS Features and Restrictions


Vonage Customers Using US Shared Short Codes

T-Mobile and AT&T’s new Code of Conduct prohibits the use of shared originators, therefore, Shared Short Codes will no longer be an acceptable format for A2P messaging.

  • Vonage customers using a Shared Short Code must migrate SMS traffic to either a 10 DLC, Toll Free SMS Number, or Dedicated Short Code.
  • Vonage customers using our Shared Short Code API must migrate to either our SMS API or Verify API.
  • Customers using Dedicated Short Codes are not affected by these changes within the scope of 10 DLC.

The US has very specific messaging restrictions and a direct connection is necessary in order to ensure message delivery to the numerous networks. Vonage has extremely high-quality, direct connections in order to facilitate delivery of your SMS to the US.

Sender ID

All SMS sent to the US must originate from either a US pre-approved long number, toll-free, 10 DLC, or short code that is associated with your Vonage account. Alpha Sender IDs are not supported.

Definitions

P2P: P2P (person-to-person) traffic may be sent using a Vonage US (or Canadian) long virtual number. If you do not already own one, long virtual numbers are available through your Vonage API account dashboard.

A2P: A2P (application-to-person) traffic, such as bulk notifications, should be sent to the US via Short Code (*Sprint and T-Mobile are heavily blocking Short Code traffic) or Toll Free Number.(**Vonage US Short Codes cannot be used to send SMS to Canada or other countries). If none of our pre-approved Short Code use-cases are appropriate, we can assist you in the application process for a dedicated Short Code.

Specific Features and Restrictions for Each Type of Number

US SMS Delivery Options

US SMS Sending Options

Long Code

Dedicated Short Code

Toll Free SMS

Example

12013511943

12345

1-888-555-5555

Daily Send Limit

250 SMS/Day/Number

N/A

N/A**

Throughput Limit

1 SMS/sec./Number

Up to 30 mps

Up to 30 mps

Canadian Reach

Yes

No (User must purchase a Canadian Short Code)

Yes

2-Way SMS Support

Yes

Yes

Yes

Suggested Use Case

P2P: Non-Marketing, Customer Service, and Chat Applications

Marketing, High Volume School/Flight/ Appt reminders

Non-Marketing, Customer Service, Alert Notifications

Price Per Number/Month

See
Vonage Pricing

See
Vonage Pricing

See
Vonage Pricing

Price Per Outbound Message

See
Vonage Pricing

See
Vonage Pricing 

See
Vonage Pricing

Price Per Inbound Message

See
Vonage Pricing

See
Vonage Pricing

See
Vonage Pricing

Set Up Time

Available immediately

Log in to your Vonage account to get started.

8-12 Weeks

Contact your Sales representative to get started.

Vonage Pre-Approved: Available Immediately.
Log in to the Vonage API Dashboard to get started.

User Owned: 3-7 business days.
Contact your Sales representative to get started.

Carrier Delivery Receipts (Tier 1 Carriers*)

No - network only

Yes

Yes

Unicode

Yes

Yes

Yes

Concatenated

Yes

Yes

Yes

Regulatory

Immediate code shutdown for marketing messages. Subject to carrier filtering.

CTIA and TCPA Guidelines

CTIA and TCPA Guidelines. Immediate code shutdown for marketing message.

*Tier 1 Carriers include AT&T, T-Mobile, Verizon, Sprint
**Unverified traffic is subject to proprietary volumetric limits. See information for Verified Toll-Free.

Additional Information

Global SMS Features Overview (Outbound-Only)

Global SMS Numbers Features Overview

US LVN Restrictions

US Short Codes

US Toll-Free Restrictions

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