Call Bomber — Test Call Delivery in Seconds
Fire test calls through live voice gateways to verify delivery rates and service reliability on numbers you own or are authorized to test.
SMS Service Tester
Pick a gateway region, enter the target number and start your call delivery test.
Testing completed
All test messages were dispatched. Check the handset delivery report.
Testing guidelines
This tool is for legitimate SMS gateway testing and debugging only. You must own the target number or have explicit consent from its owner, and you must comply with your local telecommunications laws.
Protect your number
Add a number to the blocklist and this tool will refuse to test it.
Why test your call gateway?
Delivery rates vary by carrier, region and time of day. Verify before you deploy.
Real delivery checks
Place live test calls through production voice gateways and confirm they actually connect on the handset.
Responsible by design
Built-in 30-message cap, consent requirement and a self-serve blocklist keep testing legitimate.
Call + SMS gateways
Compare voice and SMS OTP delivery side by side and find the most reliable service for your region.
Call Testing Best Practices
Professional guidelines for responsible call testing.
Recommended
- Always get explicit consent before testing a number you don't own.
- Prefer your own devices or dedicated test numbers where possible.
- Use slow speed for carrier-sensitive routes; fast for load checks.
- Document your test runs for compliance and debugging.
Never do this
- Never use this tool for harassment, spam or pranks.
- Never test strangers' numbers without their permission.
- Never ignore local telecom and privacy regulations.
- Never exceed what you need — small samples are usually enough.
Frequently asked questions
Everything you need to know before running a test.
Is the call bomber free?
Yes. You can run up to 30 test calls per run, completely free and without creating an account. Just pick a gateway region, enter the number and start.
Which numbers can I test?
Only numbers you own or have explicit permission to test. Numbers on our protection blocklist are automatically refused, and abuse may lead to access restrictions.
What is the difference between call and SMS testing?
Call testing places automated voice calls through voice gateways, while SMS testing dispatches text messages. Call testing is only enabled for regions where the gateway supports it — otherwise the option is disabled automatically.
How do the speed settings work?
Slow sends one request every 4 seconds, medium every 2 seconds and fast every 1 second. Use slow for sensitive carrier routes and fast when you want a quick load sample.
How do I block my number?
Enter your number in the "Protect your number" box above and submit. It is added to the blocklist and this tool will refuse any future test against it.
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