LINE
An instant messaging application developed by LY Corporation, offering text, voice and video calling, and social services. It is widely used in Japan, Taiwan, Thailand and other regions. Registration requires verification via a phone number or a third-party account.
Timeline (last 90 days)
If LINE was registered with an email and password, these credentials may be allowed for account transfer operations, but email login cannot fully replace all registration or verification steps.
LINE phone number verification only supports regions such as Hong Kong, Japan, South Korea, Taiwan, and Thailand.
LINE verification does not support landlines, some VoIP numbers, or numbers that cannot receive SMS or calls.
LINE's verification system records the request frequency for each phone number, device fingerprint, and IP address, and initiates a cooldown mechanism when multiple requests are made within a short period.
Residential proxy IPs come from home broadband networks, and the ASN belongs to the local telecom operator (such as Japan's NTT or Thailand's AIS), so LINE identifies them as a genuine residential registration environment.
Data center proxy IPs are allocated in bulk by cloud service providers, and WHOIS records show they belong to commercial organizations, so LINE's risk identification system gives them a low trust score.
LINE officially warns explicitly: binding a phone number already associated with another LINE account during new registration may cause the original account to be deleted.
When LINE detects that the user's region does not support phone number verification or the user actively chooses third-party login, it invokes the OAuth authorization flow of an Apple ID or Google account, without requiring an SMS verification code.
LINE accounts registered through third-party authorization (Apple ID or Google account) may still require phone number verification when subsequently transferring devices.
LINE verification codes must be used within their validity period, and must be re-obtained after expiry.
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All Facts (13)
If LINE was registered with an email and password, these credentials may be allowed for account transfer operations, but email login cannot fully replace all registration or verification steps.
50%UnverifiedLINE phone number verification only supports regions such as Hong Kong, Japan, South Korea, Taiwan, and Thailand.
50%UnverifiedLINE verification does not support landlines, some VoIP numbers, or numbers that cannot receive SMS or calls.
50%UnverifiedLINE's verification system records the request frequency for each phone number, device fingerprint, and IP address, and initiates a cooldown mechanism when multiple requests are made within a short period.
50%UnverifiedResidential proxy IPs come from home broadband networks, and the ASN belongs to the local telecom operator (such as Japan's NTT or Thailand's AIS), so LINE identifies them as a genuine residential registration environment.
50%UnverifiedData center proxy IPs are allocated in bulk by cloud service providers, and WHOIS records show they belong to commercial organizations, so LINE's risk identification system gives them a low trust score.
50%UnverifiedLINE officially warns explicitly: binding a phone number already associated with another LINE account during new registration may cause the original account to be deleted.
50%UnverifiedWhen LINE detects that the user's region does not support phone number verification or the user actively chooses third-party login, it invokes the OAuth authorization flow of an Apple ID or Google account, without requiring an SMS verification code.
50%UnverifiedLINE accounts registered through third-party authorization (Apple ID or Google account) may still require phone number verification when subsequently transferring devices.
50%UnverifiedLINE verification codes must be used within their validity period, and must be re-obtained after expiry.
50%UnverifiedLINE cooldown times typically range from a few minutes to several hours, depending on the number of triggers and the platform's policy.
50%UnverifiedIt is not recommended to use virtual numbers or temporary SMS-receiving platforms to register for LINE, as such numbers often fail to meet verification requirements, lack long-term control, and cause trouble in subsequent logins or account transfers.
50%UnverifiedSaleSmartly supports multiple social channels including WhatsApp, Instagram, Messenger, TikTok, Telegram, LINE, and WeChat.
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