Mineral & Land Records System (MLRS)

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MLRS Overview

The Bureau of Land Management (BLM) is developing the Mineral & Land Records System (MLRS) to replace the Legacy Rehost 2000 (LR2000) case management system, Alaska Land Information System (ALIS), and land status records (e.g., Master Title Plats, Historical Indices, Tract Books).

MLRS is a customer-centric, geospatially enabled land information system that employs nationally standardized business processes, ensuring the quality and accuracy of land and mineral records and data while securely delivering land records information to relevant BLM staff, customers, and the public.

MLRS is currently available for mining claims, oil and gas, and geothermal cases. Over the next two years, additional MLRS modules will be released in support of land use authorizations and realty billing; coal and other mineral development; land and mineral title; and withdrawals, classifications, and other actions on Federal lands and mineral estate.


Notice to MLRS Users

Updated Jan. 3, 2023

The MLRS Community site is temporarily offline as a precautionary measure following a routine privacy review. There is no indication of any privacy violations or of data being compromised, and we are addressing the concerns raised in the privacy review as quickly as possible, with an aim to relaunch in February 2023.

Please note that as the MLRS Community site will not be back online before then, users will need to proceed with any urgent BLM transactions via offline processes. For MLRS business activities you can do the following:

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Frequently Asked Questions

Note: The following FAQs are focused on the new MLRS Fluid Minerals & Geothermal module. For FAQs and other support related to the Mining Claims module, visit the MLRS Help Center by clicking on the following button:




What can I do as a registered user in MLRS for Oil & Gas and Geothermal case types?

MLRS enables you to view your cases through the online portal. You can:

  • Track your case status
  • View and bookmark current and historic land information on the research map
  • Access a custom view of your leases and agreements
  • Create and modify your MLRS profile

Please note: to create and track lease nominations, you will continue to use the National Fluids Lease Sale System (NFLSS).

When will Oil & Gas and Geothermal cases be available in MLRS?

Oil & gas and geothermal cases are available in MLRS as of March 14, 2022.

Does the introduction of MLRS change anything for Oil & Gas and Geothermal businesses or individual lessees?

The MLRS system does not change processes but enhances how you interact with case data online. Businesses and individual lessees have transparency into tracking and viewing their leases and agreements with the MLRS system from the convenience of a computer or mobile device. 

I heard the BLM's serial numbers are changing. What is the new format and what else do I need to know?

With MLRS, the BLM is transforming the standardized serial number format nationwide. The new format is: two-letter abbreviation for the geographic state, two letters for the BLM administrative state, and nine digits. For example, NMNM12345789. With MLRS, you can view and search for existing cases with the new unique MLRS-generated serial number or your current legacy serial number. New cases will not have a legacy serial number.

Will Operators need to change anything on the ground because of the new serial number?

Operators will not need to change anything on the ground. They will be able to keep the legacy serial number on all existing signage with BLM.

How does MLRS interact with NFLSS? Is NFLSS going away?

MLRS and NFLSS will share data. NFLSS will not be shut down; rather it will work with MLRS by automatically sending updated information to MLRS. All pre-leasing activities will still use NFLSS. Post-leasing actions will be handled by BLM staff in MLRS, and will be viewable by customers in MLRS too.

Where can I find more information on the MLRS Fluid Minerals & Geothermal module?

For more information on the new module, check out our Fluid Minerals & Geothermal Release Information for Operators and Lessees brochure.

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Related Resources


BLM is using a phased, modular approach to transition all case types into MLRS.

Icon of a mining cart filled with stone
Mining Claims
Now live!
Fluid and geothermal icon
Fluid Minerals & Geothermal
Now live!
Natural landscape with mountains, tree, dirt road, sun
Remaining LR2000 Cases
Icon of a solid color in the shape of the State of Alaska
Remaining ALIS Cases
Icon depicting land layers
Next Generation Master Title Plats

Contact Info

General MLRS inquiries:

MLRS technical support: