Bulk Phone Number Checker — WhatsApp, Telegram & 45+ Platforms

CheckNumber.AI supports 45+ platforms across five categories: messaging apps (WhatsApp, Telegram, Viber, LINE, Zalo, iMessage, RCS, Signal, Messenger), social networks (Facebook, Instagram, Twitter/X, Threads, Snapchat, Microsoft), e-commerce and streaming (Amazon, Apple, Netflix, Spotify), cryptocurrency exchanges (Binance, KuCoin, HTX, CoinW), and phone carrier detection. Each detector works by phone number, and several also work by email address. You can run any of them by uploading a CSV or TXT list on the no-code platform or through the REST API. New platforms are added regularly — see the full, current list with per-platform details on our pricing page.

Both options are available for WhatsApp and all 45+ supported platforms. Upload a CSV or TXT file directly through our web platform for a no-code workflow, or integrate via REST API for automation. Our system checks each number in real time.

Our WhatsApp and multi-platform verification system checks in real time against each platform's servers, ensuring high-accuracy results. Processing speed varies by platform due to their rate limits. Upload your list and results are returned as they complete.

All checks are performed live against the target platform — never cached or stale data — so a result reflects the account's status at the moment of the check. Accuracy varies by platform and by the type of check: a registration check returns whether the number or email is registered, while activity or profile checks (available for some platforms such as WhatsApp, Telegram, and Viber) return additional signals. Because signals come directly from each platform, our real-time engine delivers consistently high-accuracy registered/not-registered classification. For borderline cases, re-check with the full E.164 number and review the exported result file.

Yes — your task history stays in your account, so you can review past batches and re-download your results anytime. The numbers you upload aren't stored long-term or shared; they're used only to run the checks you request. See our Privacy Policy for details.

All countries and international number formats are supported. Provide numbers in full E.164 format — a leading plus sign, country code, and subscriber number, with no spaces or dashes (for example, +14155550100). Our system recognizes 200+ country codes automatically, so you don't need to group or pre-format your list by region. This makes it straightforward to verify a single global list containing numbers from many countries in one batch. If some rows come back as not registered, first check that each includes the correct country code, since a missing or wrong prefix is the most common cause of false negatives.

Verification is billed pay-as-you-go, priced per 10,000 checks and varying by platform — from social and messaging apps to crypto exchanges. There is no monthly fee, and topped-up credits never expire. See current pricing for every platform on our pricing page.

Yes. New accounts receive 1,000 free checks upon signup — no credit card required. You can also try a single WhatsApp number check for free on our homepage without logging in.