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Throttling and quiet hours

Pace your sends and respect time zones.

3 min read Updated 2026-04-24

Even with A2P registration, carriers rate-limit per number. Sending 10,000 SMS in one minute triggers filtering; spreading the same over 60 minutes delivers cleanly.

  • Default throttle: 1 msg/second per 10DLC number.
  • Toll-free: 3 msg/second.
  • Short code: 100+ msg/second.
  • Set quiet hours per broadcast: do not send between 9pm and 8am local.