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. The NILS interactive map viewer allows you to search and display most of the non-Alaska land and mineral, status, and mining claims records along with a variety of reference maps including surface management agency boundaries, T/R/Sec/Aliquot, rivers, roads, topo maps, and imagery. You can link from GeoCommunicator directly to LR2000 to get a serial register page or a township geographic report. GeoCommunicator is meant to compliment LR2000 with mapping capabilities not replace it. LR2000 is the definitive source for the records. 
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.