A Dedicated Real-SIM Number for Crypto Exchange Verification
Stop getting blocked by Coinbase, Binance, Kraken, KuCoin, Gemini, and more. JoltSMS gives you a dedicated non-VoIP, real-SIM US number for exchange verification — with instant Slack, Discord, and webhook alerts when your 2FA code arrives.
- Non-VoIP real-SIM number that passes exchange KYC where VoIP gets rejected
- Receive 2FA codes instantly in your JoltSMS inbox, Slack, Discord, or Telegram
- Long-term rental — keep the same number for every future login and withdrawal confirmation
- Shared team inbox for trading firms, DAOs, and crypto fund managers
Why Crypto Exchanges Block Virtual Numbers
Crypto exchanges are among the strictest phone verifiers in the world. Because they're regulated financial platforms holding real assets, they invest heavily in fraud detection — and that includes rejecting phone number ranges that are flagged as VoIP, MVNO, or disposable. Major exchanges including Coinbase, Binance, Kraken, KuCoin, and Gemini all perform carrier lookups before accepting a number for KYC or 2FA.
- •VoIP range detection: Exchanges query carrier lookup APIs. Numbers flagged as "VoIP," "MVNO," or "non-fixed" are rejected before an SMS is ever sent.
- •Recycled number bans: Disposable SMS services recycle numbers between users. If a number was previously used on an exchange, it's often permanently flagged.
- •"Number already in use" errors: Popular VoIP number pools get exhausted quickly on high-volume exchanges, making them useless for new verification.
- •Withdrawal gates: Many exchanges require re-verification via SMS before every large withdrawal. A number that stops working mid-relationship locks you out of your funds.
- •KYC escalation: Regulatory upgrades (Binance.US in 2023, Kraken in 2024) have made phone verification stricter at each compliance tier.
The cost of the wrong number isn't just a failed verification — it's getting locked out of an account holding real assets. Exchanges treat your phone number as a long-term recovery mechanism, not a one-time check.
How JoltSMS Solves Exchange Verification
JoltSMS provides a dedicated, non-VoIP, real-SIM US number that lives on a real mobile carrier network — not a virtual cloud. Your number is yours alone for the rental period. You receive all exchange SMS in a shared inbox, with instant alerts to Slack, Discord, Telegram, Microsoft Teams, Email, or a webhook endpoint.
- Physical SIM on real carrier networks (T-Mobile/AT&T) — not a VoIP range
- Dedicated to you: not shared with other JoltSMS customers during your rental
- Long-term rental: keep the number through every future withdrawal confirmation and login
- Team inbox: trading firms and DAOs share access without sharing personal phones
Who Uses JoltSMS for Crypto Exchange Verification
Active Crypto Traders
You're on Coinbase, Binance, and Kraken simultaneously. Every withdrawal confirmation triggers an SMS. Keep one dedicated JoltSMS number across all your exchanges so you never miss a 2FA code — and get it in Slack the moment it arrives.
Trading Firms & Crypto Funds
Multiple traders, one shared exchange account. Instead of routing critical 2FA codes through one employee's personal phone, your whole team sees codes in a shared inbox. No single point of failure. Roles and permissions built in.
Security-First Holders
SIM swap attacks drained $28.4M from crypto accounts in 2024. A JoltSMS number exists on our infrastructure — there's no carrier SIM card an attacker can social-engineer to port your number. Your exchange 2FA stays stable.
How to Verify a Crypto Exchange with JoltSMS
Sign up at JoltSMS
Get your dedicated US real-SIM number
Go to your exchange phone verification screen
Find the account settings, KYC flow, or 2FA setup in Coinbase, Binance, Kraken, or your exchange of choice
Enter your JoltSMS number
Use your dedicated real-SIM US number as the phone number
Receive the SMS code instantly
The exchange sends a verification code — it appears in your JoltSMS dashboard within seconds
Complete verification
Enter the code in the exchange to finish verification and unlock withdrawals or 2FA
Set up instant alerts
Configure Slack, Discord, Telegram, or webhook notifications so codes reach you the moment they arrive — critical during volatile markets
Keep the number active long-term
Maintain your subscription to use the same number for future logins, withdrawal confirmations, and 2FA re-enrollments across all your exchanges
Shared Exchange Access for Teams
Trading firms, crypto funds, and DAOs routinely manage exchange accounts that multiple people need to access. JoltSMS team access means the 2FA code is never stuck on one employee's phone.
- Shared inbox so every authorized team member sees withdrawal confirmation codes
- Slack, Discord, Telegram, or Microsoft Teams alerts sent simultaneously to all configured channels
- Role-based access: Owner, Manager, and Viewer permissions built in
- Webhook delivery for algorithmic traders and automated compliance workflows
What to Know Before You Start
Not affiliated with Coinbase, Binance, Kraken, KuCoin, or Gemini. JoltSMS provides phone numbers for legitimate account verification.
Best practices:
- No acceptance guarantee: We can't guarantee any exchange will accept our numbers. JoltSMS provides real-SIM numbers that are more likely to be accepted than VoIP — but exchanges make their own decisions.
- US numbers only: JoltSMS currently provides US-based real-SIM numbers. If your exchange requires a number from a specific non-US country, JoltSMS is not the right fit.
- Inbound only: JoltSMS is for receiving SMS. We do not support outbound calls or SMS sending.
- Not a replacement for hardware keys: For maximum crypto account security, use a hardware security key (FIDO2/YubiKey) where your exchange supports it. JoltSMS is an SMS-layer solution.
- Keep your account active: If your JoltSMS subscription lapses, exchanges tied to that number will not be able to reach you for 2FA. Treat this number like any other critical account credential.
Crypto Exchange verification FAQ
We can't guarantee acceptance on any specific exchange. JoltSMS provides non-VoIP, real-SIM US numbers that run on real carrier networks (T-Mobile/AT&T). Because these numbers are not flagged as VoIP or virtual, they are generally treated more like standard mobile phones. Many of our customers use JoltSMS numbers successfully on major exchanges — but each platform makes its own acceptance decisions.
Get your crypto exchange verification number now
Stop getting blocked by Coinbase, Binance, Kraken, and KuCoin. Get a dedicated real-SIM US number for exchange SMS verification — with instant Slack, Discord, and webhook alerts.