SMS Sending Limits
Message customers2 min readUpdated 2026-03-12
SMS Sending Limits
JustCall enforces sending limits to protect number reputation and ensure carrier compliance. Limits vary by number type, registration status, and plan.
Limits by Number Type
| Number Type | Default Limit | Notes |
|---|---|---|
| 10DLC (registered) | Based on trust score tier | Low: 0.2 msg/sec, Medium: 10 msg/sec, High: varies |
| 10DLC (unregistered) | Blocked | US 10DLC messages blocked since Sep 2023 |
| Toll-free (verified) | ~3 msg/sec | Higher throughput than 10DLC low tier |
| Toll-free (unverified) | Restricted | May be blocked by carriers |
| Short code | 100+ msg/sec | Highest throughput, requires separate application |
Daily Limits
JustCall may apply daily sending limits per number to prevent carrier filtering. These limits depend on your account age, sending history, and number reputation.
Check your current daily limit under Settings → Phone Numbers → select a number → SMS Limits.
Increasing Your Limits
- Register for 10DLC with accurate brand and campaign information to unlock higher throughput tiers.
- Improve your trust score — use a verified EIN, maintain a company website, and provide consistent registration data.
- Verify toll-free numbers to remove the unverified throttle.
- Contact support if your registered throughput doesn't match your trust score tier.
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