Step-by-Step Guide: How to Use InstantNum to Receive SMS Codes
Many websites and apps require phone verification before allowing access. While this helps reduce spam, it can also expose your personal phone number to unwanted messages and privacy risks.
InstantNum offers a simple solution — receive SMS verification codes online using temporary phone numbers.
This guide walks you through exactly how to use InstantNum, step by step.
What Is InstantNum?
InstantNum is an online platform that provides public temporary phone numbers for receiving SMS messages. These numbers can be used for:
One-time verifications
App signups
Testing SMS workflows
Short-term access needs
No SIM card or registration is required.
Temporary phone numbers have many practical and responsible applications. If you want to explore them in detail, check out our guide on Top 10 Legitimate Use Cases for Temporary Phone Numbers.
Step 1: Visit the InstantNum Website
Open your browser and go to InstantNum.
You’ll see a list of available temporary phone numbers from different countries.
Step 2: Choose a Country
Select the country that best fits your needs.
Some websites only accept numbers from specific regions, so choosing the right country increases the chance of receiving the verification SMS successfully.
Step 3: Select a Temporary Phone Number
Click on a phone number from the list.
Each number has a public inbox where incoming SMS messages appear in real time.
Step 4: Enter the Number on the Website or App
Copy the selected phone number and paste it into the signup or verification form of the website or app you’re registering on.
Make sure to:
Include the correct country code
Enter the number exactly as shown
Step 5: Wait for the SMS Verification Code
Once the website sends the message:
Return to the InstantNum inbox
Wait a few seconds for the SMS to appear
Most messages arrive quickly, but delays can occasionally happen depending on the sender.
Step 6: Read and Copy the OTP Code
When the message appears:
Open it in the inbox
Copy the verification (OTP) code
Paste it back into the website or app
Your verification should complete instantly.
Step 7: If the SMS Doesn’t Arrive
If you don’t receive the code:
Refresh the inbox
Try a different number
Choose another country if available
Request a new code from the website
Some platforms block shared or public numbers, which is normal.
Important Things to Know
Before using InstantNum, keep these points in mind:
SMS inboxes are public — do not use for sensitive accounts
Messages may be visible to others
Numbers are temporary and may stop working at any time
InstantNum is best for non-critical, short-term verifications.
Best Practices for Safe Use
To get the best experience:
Avoid using temporary numbers for banking or financial services
Use them only for one-time or testing purposes
Do not reuse numbers for long-term accounts
Responsible usage ensures privacy and security.
Why Choose InstantNum?
InstantNum offers:
Free access to temporary numbers
Multiple country options
No registration required
Fast SMS delivery
It’s a convenient tool for users who value privacy and simplicity.
Final Thoughts
Receiving SMS verification codes doesn’t have to mean sharing your personal phone number everywhere.
With InstantNum, you can receive SMS online quickly and responsibly — perfect for signups, testing, and short-term access.