These numbers have recently received SMS from costar. Click any card to verify your account immediately.
SIYour costar verification code is 431666.
SIYour costar verification code is 989970.
SIYour costar verification code is 543104.
SIYour costar verification code is 391176.
SIYour costar verification code is 522404.
SIYour costar verification code is 176527.
How to Verify costar with a Temporary Number
Need to register for costar but don't want to use your personal phone number? We offer valid Slovenia phone numbers specifically for costar verification.
Our service helps you maintain privacy and complete SMS verification on costar easily. The numbers are updated frequently to ensure they work with the latest security checks.
Think of this as a privacy phone number: a temporary phone number (burner phone number online / second phone number) you can use to receive SMS online for privacy or testing. It helps protect your phone number from data leaks, spam calls, and unwanted marketing messages.
Common use cases
- Protect your personal phone number and reduce spam calls / marketing messages.
- Receive SMS online for privacy/testing (QA, automation, demos, and account verification).
- Use a phone number for Craigslist / marketplace / apartment rental listings without exposing your real number (SMS only; voice calls may not work).
Step-by-Step Guide
- 1Select an active number from the list above.
- 2Enter the number into costar app or website.
- 3Wait for the SMS code to appear on this page (auto-updates).
- 4Copy the code and complete your registration!
Frequently Asked Questions
How to receive costar verification code without a phone number?▼
You can use ValoSIM's free temporary phone numbers. Simply select a number from our list above, enter it into costar, and wait for the SMS code to appear here. No registration needed.
Is costar SMS verification free?▼
Yes, receiving SMS codes for costar on our platform is 100% free. We provide disposable numbers to help you complete phone verification without costs.
Why am I not receiving the costar code?▼
If the code doesn't arrive within 2 minutes: 1) Try a different number (some numbers may be blocked by costar), 2) Ensure you selected the correct country code, 3) Refresh the page to check for new messages.
Are these numbers safe for my costar account?▼
These are public temporary numbers. We recommend using them for secondary accounts or one-time verifications. Do not use them for banking or sensitive personal accounts as messages are public.
Is this a privacy phone number or burner phone number for costar?▼
ValoSIM provides temporary phone numbers you can use as a privacy phone number, burner phone number online, or second phone number to receive SMS online for costar. Please remember: messages are public, so don't use it for banking or sensitive 2FA.
Can I receive SMS online for privacy/testing?▼
Yes. Many users receive SMS online for privacy/testing (QA, automation, staging) and use it to complete costar verification without exposing their personal number.
Can I use a phone number for Craigslist / marketplace / apartment rental listings?▼
Often yes (for sign-up or SMS verification), but it depends on the platform. Our temporary numbers are designed to receive SMS online; voice calls may not be supported. Use them to protect your phone number when posting on Craigslist, marketplaces, or apartment rental listings.