什么是电话运营商？电话运营商（或移动网络运营商）是为电话号码提供蜂窝服务的电信公司，例如 Telkomsel、Maxis 或 Vodafone。
什么是 VoIP，为什么重要？VoIP（互联网语音协议）号码基于互联网，不绑定实体 SIM 卡。许多应用在短信验证时会拒绝 VoIP 号码，因为它们可以被批量创建。
为什么美国号码的运营商是空的？美国实行完全的携号转网，号码可以在运营商之间自由转移，因此静态号段数据库无法可靠地识别当前运营商。
这个查询的准确度如何？使用 Google 的 libphonenumber 号段数据库，对于没有完全携号转网的国家非常准确。结果反映的是原始运营商分配，而不是实时 HLR 数据。
Is this carrier lookup free?Yes. There is no sign-up, no account and no daily limit. Enter a number with its country code and the result appears instantly.
How do I find the service provider of a phone number?Enter the number with its country code, for example +44 7700 900123. The tool matches the number's prefix against the national numbering plan and shows the operator that issued it, the country and the line type.
Does it work for Indian numbers?Yes. Indian numbers return the line type, the region and the operator that originally issued the number, such as Jio, Airtel, Vi or BSNL. India allows number porting, so a ported number still shows its original operator.
Can I find out who owns a phone number?No. A carrier lookup identifies the number's network and line type, not the person behind it. Sites that promise a name or a live location from a number alone are not reliable.
My number shows as VoIP. Can I still use it for verification?Usually not on WhatsApp, Telegram, Google or X, which reject VoIP numbers. Use a carrier-backed mobile number instead. ESIMPY's virtual numbers are real mobile numbers, and one that does not receive the code refunds itself.