值得信赖的电话，可能是重要的通知，建议接听。
Reverse Phone Lookup in Mainland China — Recent Community Reports
Check unknown Chinese numbers with recent reports (Beijing, Shanghai, Guangzhou, Shenzhen) and share your experience.
Unknown calls in Mainland China
Unsure about a number from mainland China? Explore concise community notes to judge calls and texts. In Beijing, Shanghai, Guangzhou and Shenzhen you’ll see both legitimate callbacks (deliveries, banking, appointments) and waves of robocalls or phishing. Prefixes like 010 (Beijing), 021 (Shanghai), 020 (Guangzhou), 0755 (Shenzhen) and mobile 13x/15x/18x ranges are useful context but not proof of origin due to portability and VoIP.
Verification: return calls via the official number listed on the provider’s website/app, check in‑app notices and never share one‑time codes by phone. Use device/carrier blocking for repeat issues and leave a short, factual note here to help others.
Después de cinco llamadas, incluyendo cuatro llamadas silenciosas, los he bloqueado.
comportamento inaccettabile, scortese, aggressivo e offensivo.
不知道是谁打来的电话，没有留言，比较可疑。
Ten cuidado, es una estafa
Trading online的烦人广告电话，真烦人
在线交易的烦人广告，可能是推销什么东西，很烦人。
對方的態度非常不禮貌。
Ho ricevuto una telefonata fastidiosa e aggressiva, nonostante avessi detto chiaramente di non essere interessato
Trading online的电话，没什么意义
未知号码，未知类型，直接挂断了。
trading online的烦人广告，真的受不了了。
这是一通市场调查电话，提问方式专业，但可能会占用不少时间。
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我见到业不吃意这点数字说明语気我的账弅5尚不可以或老作异
4923423234342
Unknown
未知号码和类型，无法确定任何信息，谨慎对待。
GfK的市场调查电话问得很详细，感觉可靠。
Hoy a las 03:49 sonó mi teléfono, me pregunto quién podría haberme llamado a esa hora
Blocca finalmente questi chiamanti!
未知来电，没有任何说明，直接挂断最安全。
Ein Anruf kam am Samstag um 9 Uhr, ich habe nicht rangelegt.
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FAQ — China
How to verify callers in China?
Use the official number from the website/app; avoid calling back the unknown number and check in‑app messages.
Do prefixes prove location?
No. Portability/VoIP make 010/021/020/0755 and 13x/15x/18x ranges unreliable as proof.
Common patterns?
Delivery updates, bank callbacks, 2FA codes; robocalls, parcel/account phishing and scripted sales.
Helpful report details?
Caller type, purpose, date/time, and cues that guided your decision.
Popular area codes
Most-reported area codes in China. View all area codes at the bottom.