# CheckNumber.AI

> CheckNumber.AI provides bulk phone, email, carrier, messaging, social, and crypto-exchange signal checks for businesses and developers. Teams use the web platform or REST API to clean contact lists, segment records, and review supported account-related signals without requiring end-user login, QR scans, or message sending.

Last updated: 2026-07-09

## Contact

- [Website](https://checknumber.ai): Main product site and canonical English homepage
- [Blog](https://checknumber.ai/blog): Product guides, API articles, and verification workflow resources
- [Blog RSS](https://checknumber.ai/rss.xml): RSS feed for blog updates

## Services

- **WhatsApp checker**: Check WhatsApp registration, age, and activity signals for phone lists where supported.
- **Telegram checker**: Check Telegram registration, account age, and activity signals for phone lists where supported.
- **Messaging and social checks**: Supported checks include RCS, iMessage, Line, Viber, Facebook, Instagram, X/Twitter, Messenger, Snapchat, Threads, Signal, Zalo, and related account signals.
- **Consumer and app account checks**: Supported checks include Amazon, Apple ID, Netflix, Microsoft, Spotify, MAX, Airbnb, and other product-specific account signals.
- **Crypto exchange checker**: Upload CSV/TXT phone or email lists to screen for supported Crypto.com, Robinhood, Binance, KuCoin, CoinW, and HTX exchange-related signals for segmentation, enrichment, and internal review.
- **Email and carrier checks**: Email validation and global carrier filtering for list quality, routing, and segmentation workflows.
- **API integration**: REST API for real-time and bulk checks; suitable for CRMs, marketing tools, data platforms, and automation.

## Key Information

- **API**: REST API for bulk and real-time phone, email, platform, and carrier checks.
- **Formats**: CSV/TXT upload for bulk checks; structured result export for review and downstream processing.
- **Coverage**: International phone numbers with country code (for example E.164) and supported email-based checks.

- [Pricing](https://checknumber.ai/pricing)
- [Products](https://checknumber.ai/products): Product catalog for all supported social, messaging, crypto exchange, email, and carrier detection services.
- [About](https://checknumber.ai/about)
- [Blog](https://checknumber.ai/blog)
- [Contact](https://checknumber.ai/contact)
- [Privacy Policy](https://checknumber.ai/privacy)
- [Terms of Service](https://checknumber.ai/terms)
- [WhatsApp number checker](https://checknumber.ai/tools/WhatsApp-number-checker): Single-number check and extended checker content; canonical tool URL
- [Telegram products](https://checknumber.ai/products/telegram): Telegram number registration, account age, and activity signal checks.
- [WhatsApp products](https://checknumber.ai/products/whatsapp): WhatsApp number registration, account age, and activity signal checks.
- [Crypto exchange checker](https://checknumber.ai/crypto-exchange-checker): Bulk phone and email list screening for supported Crypto.com, Robinhood, Binance, KuCoin, CoinW, and HTX exchange-related signals.
- [Free Chrome extensions](https://checknumber.ai/chrome-extension): CheckNumber's local-first phone and email generation and list-cleaning utilities. They are QA/list-preparation tools, not live account-status checks.

## What We Do Not Do

- We do not send messages or access chat content. Checks return scoped account-related, carrier, email, or platform signals where supported.
- We do not require end-user QR scans, app login, passwords, or account credentials.
- We do not provide crypto trading, wallets, brokerage, investment advice, price prediction, or KYC/AML final decisions.

## AI Discovery Files

- [Sitemap](https://checknumber.ai/sitemap.xml): Full site index for crawlers.
- [This file (llms.txt)](https://checknumber.ai/llms.txt): Canonical AI discovery file for this site.
- [Full version (llms-full.txt)](https://checknumber.ai/llms-full.txt): Extended description, features, and FAQ for AI/LLM context.