The BLM currently has four different online systems for searching land records.

1. LR2000, provides reports on non-Alaska BLM land and mineral use authorizations for oil, gas, and geothermal leasing, rights-of-ways, coal and other mineral development, land and mineral title, mining claims, withdrawals, classifications, and more on federal lands or on federal mineral estate. This is a text-based system (i.e. no online maps).
2. GeoCommunicator provides interactive mapping and GIS downloading of the public land survey system (PLSS) containing township data, grazing allotments, wild horse and burro areas, abandoned mines, BLM administrative boundaries and lands, oil and gas sale parcels along with a variety of reference maps including  roads, topo maps, and aerial photography. You can link from GeoCommunicator directly to LR2000 geographic reports, abandoned mine reports, range allotment reports, and other information. Additionally, GeoCommunicator provides the data as streaming map services and web services. 
3. To search land records in Alaska, visit the Alaska Spatial Data Management System website (SDMS). SDMS is a one-stop tool to view, research, print and download information such as surveyed land parcels, land status, mining claims, and Master Title Plats.
4. Finally, BLM's General Land Office (GLO) Records Automation web site provides access to Federal land conveyance records for the Public Land States. We also provide image access to more than three million Federal land title records for Eastern Public Land States, issued between 1820 and 1908. ThePublic Land States are the lands now embraced in the States of Alabama, Alaska, Arizona, Arkansas, California, Colorado, Florida, Idaho, Illinois, Indiana, Iowa, Kansas, Louisiana, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Ohio, Oklahoma, Oregon, South Dakota, Utah, Washington, Wisconsin, and Wyoming.