US carrier registration for A2P 10DLC includes mandatory fees and messaging limits defined by US carriers. These fees and limits depend on whether you register as a business with an EIN or as a sole proprietor. This article explains what fees to expect and what messaging capabilities are available after registration.
Registration fees
US carriers apply the following fees for A2P 10DLC registration:
One-time registration fee: $19
Recurring monthly fee:
$1.50/month — businesses with an EIN
$2/month — sole proprietors
Resubmission fee: $15 (applies if a rejected application is corrected and resubmitted)
These fees are enforced by US carriers and are required regardless of your messaging provider.
Messaging limits after registration
Messaging limits depend on your registration type.
1. Businesses with an EIN
After successful registration, businesses with an EIN can:
send up to 6,000 message segments per day
send up to 2,000 segments per day to T-Mobile numbers
use any phone numbers in their DialLink workspace for messaging to US numbers
This option provides the highest flexibility and throughput.
2. Sole proprietors (no EIN)
After successful registration as a sole proprietor:
you can send up to 3,000 message segments per day
up to 1,000 segments per day to T-Mobile numbers
only one DialLink phone number can be used to send messages to US numbers
This option is intended for smaller-scale messaging use cases.
What counts as a message segment?
A message segment is a portion of an SMS message. Longer messages may be split into multiple segments depending on length and encoding. Daily limits are calculated based on total message segments sent, not the number of messages.
Benefits of completing registration
After successful A2P 10DLC registration, you can:
Reliably send SMS and MMS messages to US phone numbers.
Reduce carrier filtering and message blocking.
Enable CNAM (Caller Name) on outbound US calls.
Use DialLink messaging features in compliance with US carrier policies.
Important limitations
Even after registration:
Messaging limits are enforced by carriers.
CNAM display is not guaranteed and depends on the receiving carrier.
Misuse or policy violations may result in enforcement actions.