SecondNumber Review: Virtual SMS Numbers
Why We Recommend SecondNumber
SecondNumber provides temporary virtual phone numbers for SMS verification across 180+ countries, including real non-VoIP numbers that pass strict platform checks. Their pay-per-SMS model with automatic refunds, developer API, and crypto payment options make it an excellent companion to PROXIES.SX mobile proxies for geo-matched account creation workflows.
Quick Overview
What is SecondNumber?
SecondNumber is a virtual phone number platform that provides temporary numbers for receiving SMS and OTP verification codes. Described as "the world's most popular temporary number platform," it offers access to phone numbers from over 180 countries, making it a versatile solution for anyone who needs to verify accounts without using their personal phone number.
The platform stands out by offering over 5,000 free virtual phone numbers from 36+ countries, alongside premium options including real non-VoIP numbers. Non-VoIP numbers are particularly valuable because they come from actual mobile carriers, allowing them to work with platforms that actively block VoIP and virtual number services during verification.
SecondNumber operates on a pay-per-SMS model with automatic refunds if an SMS does not arrive, eliminating the risk of paying for failed verifications. Rental periods range from one-time use to 365 days, with pricing starting from a few cents per number. The service also accepts cryptocurrency payments and requires no KYC verification to use.
Key Features
Global Coverage
- 180+ countries available
- 36+ countries with free numbers
- 5,000+ free virtual phone numbers
- UK numbers from $2 for 365 days
Non-VoIP Numbers
- Real carrier network numbers
- Pass strict platform verification checks
- Work where VoIP numbers are blocked
- One-time use to 365-day rental periods
Developer API
- Automation and bulk verification
- Programmatic number acquisition
- Webhook callbacks for SMS notifications
- Enterprise and wholesale solutions
Crypto Payments
- Bitcoin, Ethereum, Monero accepted
- No KYC verification required
- Pay-per-SMS with automatic refunds
- Starting from a few cents per number
PROXIES.SX + SecondNumber: The Complete Account Creation Stack
IP Geo-Matching + Phone Number Country = Undetectable Setup
Platforms cross-reference your IP geolocation with the country of the phone number used for verification. A mismatch between these signals is a common trigger for account flags and bans. Combining SecondNumber's virtual numbers with PROXIES.SX mobile proxies creates a consistent geographic profile that platforms trust.
Supported Platforms
Use Cases
Account Verification
Verify accounts on social media, e-commerce, and SaaS platforms using temporary virtual numbers. Non-VoIP numbers pass the strictest verification checks. Pair with a geo-matched PROXIES.SX mobile proxy for a consistent location profile.
Multi-Account Management
Create and manage multiple accounts across platforms, each with a unique phone number and dedicated mobile proxy IP. SecondNumber's API enables bulk number acquisition while PROXIES.SX provides unique IPs per account.
Privacy & Anonymous Signups
Keep your personal phone number private when signing up for services. With crypto payments, no KYC, and a mobile proxy masking your real IP, your identity stays fully protected throughout the registration process.
Automation at Scale
Use SecondNumber's developer API alongside PROXIES.SX proxy endpoints to build fully automated verification pipelines. Webhook callbacks notify your system when SMS arrives, enabling hands-free account creation workflows.
Frequently Asked Questions
What is SecondNumber?
SecondNumber is a virtual phone number platform that provides temporary numbers for receiving SMS and OTP verification codes. It offers numbers from over 180 countries, including 5,000+ free numbers from 36+ countries. The service supports both disposable one-time numbers and longer-term rentals up to 365 days.
Does SecondNumber offer non-VoIP numbers?
Yes, SecondNumber provides real non-VoIP numbers from actual mobile carrier networks. These numbers are not flagged as virtual or VoIP by platforms, making them suitable for services like Instagram, WhatsApp, and Google that actively block VoIP numbers during SMS verification.
How does SecondNumber's pricing work?
SecondNumber uses a pay-per-SMS model starting from a few cents per number. If an SMS does not arrive, you automatically receive a refund. Rental periods range from one-time use to 365 days, with competitive long-term rates such as UK numbers from $2 for a full year. Enterprise and wholesale solutions with negotiable bulk discounts are also available.
Why should I use mobile proxies with virtual phone numbers?
Platforms cross-check the IP address geolocation against the country code of the phone number used for verification. If you use a US phone number but your IP shows a different country, the account may be flagged. PROXIES.SX 4G/5G mobile proxies provide real mobile IPs from 15+ countries, allowing you to match your IP location with your SecondNumber phone number country for a consistent, trustworthy profile.
Does SecondNumber accept cryptocurrency payments?
Yes, SecondNumber accepts cryptocurrency payments including Bitcoin, Ethereum, and Monero, among others. The service requires no KYC verification, allowing you to purchase virtual numbers with full privacy. This pairs well with PROXIES.SX, which also supports crypto payments for a fully anonymous workflow.
Final Verdict
SecondNumber is a comprehensive virtual phone number platform that covers the SMS verification needs of both individual users and large-scale operations. The combination of 180+ country coverage, real non-VoIP numbers, pay-per-SMS pricing with automatic refunds, and a developer API makes it a strong choice for account verification workflows. Paired with PROXIES.SX mobile proxies for geo-matched IPs, it creates a complete, consistent account creation stack.
Strengths:
- • 180+ countries with 5,000+ free numbers
- • Real non-VoIP numbers available
- • Pay-per-SMS with auto-refund guarantee
- • Developer API for automation
- • Crypto payments, no KYC required
Considerations:
- • Free numbers may have slower delivery times
- • Some platforms may still block certain numbers
- • Premium non-VoIP numbers cost more than standard options