实践证明：此号码自称是上海入出管理局，但可能是诈骗，要求提供个人信息，并可能要求安装app，应极度警惕。
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.
Doxa 的市场调查电话，可能是关于产品反馈，建议参与。
They claim to be from Doxa and need to conduct an interview with me about a credit institution, but their repeated calls are harassment, and I've blocked them.
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一个市对丁你服务公司，我有他丁个编号对丁你服务公司，我好丁帐超超行了你的杂的服务。我好丁帐超
Questo numero di telefono è utilizzato per una truffa che si spaccia per la gestione delle frontiere di Shanghai
这个电话号码与上海出入境管理局有关，但听起来很可疑.
This is a scam call from someone claiming to be from the Shanghai Immigration Authority
上海出入国管理局的诈骗电话，大家小心。
Nie odbierałem tego nieznanego numeru. Po przeczytaniu poprzednich komentarzy stwierdziłem, że to typowy call-center, który nieustannie dzwoni z pytaniami, które są tylko dla nich przydatne. Nie chcę być przez nich nachodzony
一接就掛的Ping通话，真是恶心！
诈骗短信，好险。差点就上当了。
Telecom / Tim的烦人广告电话，真的很烦人，希望他们不要再打来了。
诈骗短信，千万不要点开，可能会中毒。
这是一个诈骗电话，不要接听它吧
Der Anrufer kannte meinen Namen und meine Telefonnummer und fragte, ob ich ausreisebeschränkt sei
Ich weiß nicht, wer das war, aber es kam auch eine Nummer 862128952260, und ich denke, das ist ein bisschen verdächtig, weil die Anrufe von einem unbekannten Ort kamen, ich denke, das ist ein neuer Betrug.
上海出入境管理局发来的短信，内容可疑，感觉是诈骗，大家要小心！
Il numero di telefono è lo stesso dell’ufficio di controllo di Shanghai, ma è un trucco per truffare le persone, poiché l’ufficio di controllo non chiama i numeri di telefono personali.
诈骗短信，千万不要点开，可能会中毒。
近日，上海出入境管理局的電話不斷，難道現在的詐騙犯這樣明目張膽嗎？簡直不可思議，在這之前還有電話轟炸機的騷擾，現在又來一個管理局，真的很讓人討厭，如果不是不得已，我真想放棄這個號碼了，但這樣做可能會有問題
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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.