Sparkforge Inbound Call Rate Limits Explained

By Sparkforge Support Team ·Last reviewed May 3, 2026

Sparkforge enforces inbound call rate limits to prevent spam and abuse. IVR numbers are unlimited, Voice AI numbers cap at 200 calls/minute, regular numbers cap at 10–15/minute, and 5+ violations per hour blocks all inbound calls on the account.

Sparkforge enforces inbound call rate limits to keep voice infrastructure reliable and prevent spam or abuse. Limits depend on what the number is connected to: IVR, Voice AI, or a regular number.

1. IVR-Connected Numbers

No restrictions. IVR-connected numbers are designed for high volume and aren’t rate limited on inbound.

2. Voice AI-Connected Numbers

Voice AI numbers handle automated, concurrent calls and are subject to stricter controls.

Condition	Threshold	Result
From a number	>200 calls per minute	1 violation, current call blocked
To a number	>200 calls per minute	1 violation, current call blocked
Violation cap	>5 violations per hour	All inbound calls on the account are blocked

3. Regular Numbers

Regular numbers (not connected to IVR or Voice AI) have tighter limits to prevent misuse.

Condition	Threshold	Result
From a number	>10 calls per minute	1 violation, current call blocked
To a number	>15 calls per minute	1 violation, current call blocked
Violation cap	>5 violations per hour	All inbound calls on the account are blocked

What Happens at the Violation Cap

If your account passes 5 violations in an hour, all inbound calls are blocked on both Voice AI and regular numbers. Contact Sparkforge support to restore access.

How to Stay Under the Limits

Use IVR for high volume. If you expect heavy inbound traffic, route through IVR-connected numbers — those aren’t rate limited.
Distribute call volume. Don’t funnel everything through a single regular number; spread load across multiple numbers.

Frequently Asked Questions

Are IVR numbers rate limited?

No. IVR-connected numbers don’t have inbound call rate limits and are the recommended option for high call volume.

What’s the inbound call limit for a Voice AI number?

200 calls per minute either to or from the number. Exceeding it counts as a violation, and 5 violations in an hour blocks all inbound calls on the account.

What happens if my account hits the violation cap?

All inbound calls are blocked on Voice AI and regular numbers. You’ll need to contact Sparkforge support to restore service.

How do I prevent rate-limit violations?

Move high-volume traffic to IVR-connected numbers and spread inbound calls across multiple numbers instead of funneling everything through one.