Phone Number Validation Tool
- Number format check
- Validity check
- Location detection
- Carrier detection
- Line type detection
- Fake & disposable numbers detection
We constantly monitor the web to detect and identify new disposable, virtual and temporary phone numbers.
Use our API to implement fake phone number detection in your application to prevent fraudsters from creating accounts. Try out our detector with free lookups.
- Per verification
- $0.0025
- Disposable numbers detected
- 120 000+
- Constantly updated database
- Real-time
Onboard real users, not bots
Implement our phone number validation API to detect fake and virtual numbers. Create an account and try out NumCheckr with 100 free lookups per month.
Why should you integrate a fake phone number detector?
Determining if phone numbers are fake or real make your OTP verification process more secure and cost-effective. Don't let fraudsters hide behind virtual phone numbers.
- Avoid fraudsters and spammers
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Identify which of your users are using temporary or virtual phone numbers. Once you have this information, you can decide whether to block these users or flag them for further review.
- Cut down on SMS expenses
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Detecting disposable phone numbers upfront will prevent you from having to send them OTPs, resulting in significant cost savings on your text message bill (Twilio, Vonage, AWS SNS, etc.).
- Carrier and line type detection
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Along with identifying whether a phone number is fake, we also provide additional details like the number’s country, carrier, and line type, which may be useful for you.
Frequently asked questions
If you have a different question and are unable to find the answer you seek, please feel free to contact our support team by sending us an email. We’ll get back to you as soon as we can.
- What is a disposable phone number?
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A disposable phone number is a temporary and anonymous telephone number that can be easily obtained on various shady websites (OnlineSIM, AnonymSMS...) and used for a short period of time. Any text message sent to this number is automatically forwarded and displayed to the issuing website.
It is commonly used to avoid sharing real phone numbers when signing up for websites or services. However, in practice, these numbers are often employed for malicious purposes, such as creating fake accounts or engaging in fraudulent activities. That's why it's crucial to implement a fake phone number checker to protect your platform from such users.
- How to verify if a phone number is fake?
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Our platform provides a convenient REST API that allows you to verify whether a phone number is disposable or not.
We recommend adding this API call to your user sign-up process. By checking phone numbers validity and stopping users with disposable numbers, you can prevent fraudsters from joining your app. This also helps you avoid wasting money by sending verification codes (OTP) to virtual numbers.
- How do you detect virtual phone numbers?
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We monitor the web in real-time to detect any newly released disposable phone number. Our database, containing hundreds of thousands of numbers, is updated multiple times daily!
To ensure the highest level of accuracy, we use a combination of scraping, data analysis, and machine learning to detect and identify virtual and temporary phone numbers. Our team constantly improves and updates our detection models to keep up with the latest trends in disposable phone numbers.
- What does your API verify when checking a phone number?
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Our fake number checker API provides a comprehensive analysis of the phone number you submit. It checks the number format, validates its correctness, determines its location, identifies the carrier, specifies the line type, and most importantly, assesses whether the number is disposable.
- How many API calls can I make?
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You can make 100 calls with the free plan, 40,000 calls with the essential plan, and 500,000 calls with the premium plan. If you need more virtual number checks, please contact us for additional options.