Make sure you have a good reason for the check. It will only be accepted to counter vandalism or disruption to Wikimedia wikis. Valid reasons include needing a block of the underlying IP or IP range, disruptive sockpuppetry, vote-stacking, and similar disruption where the technical evidence from running a check would prevent or reduce further disruption.
Be specific in your reasons. Ambiguous or insufficient reasons will cause delays. Explain the disruption and why you believe the accounts are related, ideally using diff links or other evidence.
Reason(s): These three have been creating pages like "Barron Strong: Never Forget", "Barron, Wisconsin Strong", "Washington DC Protest: Never Forget" and "Hurricane Dorian: Never forget". I suspect there is an LTA behind this. Please investigate to see which accounts are coming from this IP and if possible, glock them.--acagastya 05:05, 12 June 2021 (UTC)
Reason(s): The first user repeatedly added biased description to Taiwanese actor articles and TV drama articles, and we believe the edit tendency is similar to that of the latter one, but due to high traffic of the articles, we can't call them a duck. Thank you. --SuperWang (Chinese Wikimedian since 2009 | Greetings from Dalian) 01:49, 13 June 2021 (UTC)
Reason(s): This user (and the socks) are either doxxing or spamming -- their deleted userpage contains the relevant data to indicate they are the same -- can anyone lock the accounts originating from that IP? Will be much appreciated. acagastya 16:52, 13 June 2021 (UTC)
Comment@Acagastya: Are you requesting to check sleepers? Requests for locking accounts should be made at SRG; this page is solely for processing checkuser requests.
Also I'm not sure how this global lock request fits the current guideline. A local wiki block should be sufficient. --LittleThor (☎) 22:22, 14 June 2021 (UTC)