PEC-SUB-0002 and similar errors may involve VPN, proxy, or network-reputation signals, but account, eligibility, or service factors outside IPOK may also matter. Only Prolific can identify the trigger.
IPOK can show ISP, hosting, proxy, and third-party reputation labels. It cannot guarantee that changing to a residential connection will restore access.
The error may involve the current network or IP, but the code alone does not establish account status or identify the database or rule Prolific used. Treat IPOK labels as supporting evidence only.
Compare hosting, proxy, blocklist, and regional labels, then use your normal compliant network as a control. A reconnect may not change a dynamic address, and a new address is not guaranteed to carry fewer signals.
No conclusion follows from the code alone. It may involve the current network/IP or another factor; follow Prolific's official message or support guidance.
Addresses may be recycled or inconsistently classified, but that is only one possibility. Reconnecting may not change the address, and a new address is not guaranteed to be cleaner.