BLM's MLRS page says both old and new serial numbers are searchable and points to its public reports at reports.blm.gov/reports/MLRS. That index lists 'Mining Claims - Customer Info Report', 'Mining Claims - Serial Number Index', 'Mining Claims - Claim Name/Number Index', 'Mining Claims - Geographic Report' and a 'Public Mining Claims Serial Register Page', and notes the public versions carry Privacy Act redactions (unredacted access needs a Login.gov account). The reports themselves (under reports.blm.gov/report/) are disallowed to all robots by BLM's robots.txt, and the MLRS public room (mlrs.blm.gov/s/) is disallowed too and renders only by script, so we did not read them. By hand, a resident can search mlrs.blm.gov by a serial number such as UT106782094, or run the Serial Register Page or Customer Info report at reports.blm.gov with it. Other routes: the Carbon County Recorder, where location notices must be recorded (mine-026), and the notice on the claim post itself.

• Mineral & Land Records System (MLRS) (Bureau of Land Management) primary government
• BLM Reporting Application - Mineral & Land Records System Reports (Bureau of Land Management) primary government “These reports have Privacy Act redactions.”