OpenAI blocks VoIP, Google Voice, and most virtual numbers by default — but not all. This guide explains why and shows exactly which type of number still works for ChatGPT and OpenAI API sign-up in 2026.
Why OpenAI rejects most virtual numbers
OpenAI runs incoming numbers through a carrier-type check. Numbers flagged as VoIP, toll-free, or "non-fixed VoIP" are rejected instantly. The only category that reliably passes is real mobile-carrier ranges — the same ranges physical SIMs use.
Which SMSVerifyo numbers work
On SMSVerifyo filter services for OpenAI / ChatGPT. Numbers tagged real mobile carrier in these countries currently pass OpenAI verification with a >90% success rate: India, Indonesia, Vietnam, Philippines, Pakistan.
Sign-up flow
- Sign up for OpenAI with a fresh email (Gmail works fine).
- Reach the phone verification screen.
- Rent an OpenAI-compatible number on SMSVerifyo. Paste it in.
- Code arrives in your dashboard in 20–60 seconds.
Because the code is short-lived, complete the OpenAI step within 5 minutes of renting.
What if the number is rejected mid-flow?
OpenAI shows "This phone number cannot be used for verification." Do not retry with the same number — rent a fresh one in a different country. On SMSVerifyo, failed rentals refund automatically within seconds.
API keys and billing
The number only matters for the initial verification. Once you have an OpenAI account, add a payment method and generate API keys as normal. OpenAI does not re-verify the phone number for billing.
Frequently asked questions
Can I use the same number for OpenAI and ChatGPT Plus?
Yes — they share the same account. One verification unlocks both.
Does OpenAI ban accounts made with virtual numbers?
Only if the account is used for abuse (jailbreak farms, scraping via UI). Ordinary usage — chat, API, custom GPTs — is not affected.
What is the cheapest working country?
Indonesia and India are typically under $0.50 per successful verification. Check live pricing.
Can I automate this via API?
Yes. Our reseller REST API supports OpenAI service selection, code polling, and webhook delivery for high-volume automation.