Expired50% confidenceFactExact time
Anthropic's SMS verification system can determine in real time whether an incoming number is a VoIP virtual number via a carrier query interface (HLR Lookup).
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/7/2026
First Seen
Valid until: 10/5/2026(expired)
Sources
Related Claims
UnverifiedHLR Lookup是一种电信级号码验证技术，能实时查询号码的运营商归属、在网状态和号码类型，区分VoIP与实体SIM卡的准确率极高72% similarUnverifiedOnline SMS receiving platforms use VoIP and virtual number services, purchasing phone number resources through partnerships with telecom carriers or virtual operators in various countries61% similarUnverifiedSMS verification platforms (virtual number/SMS verification services) operate by aggregating real overseas SIM card resources and renting them out, with platform operators purchasing large quantities of physical SIM cards in target countries or partnering with local carriers to obtain virtual number blocks.59% similarUnverifiedAutomation tools that log into websites on behalf of users must contend with CAPTCHAs, device fingerprint detection, anomalous behavior analysis, and bot detection systems such as Cloudflare and DataDome.58% similarUnverifiedOpenAI通过手机号短信验证来防止滥用和机器人注册56% similar
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