RESO Certification and MLS Map RESO tests technology systems to confirm compliance with ratified standards. Certification, which is complimentary for RESO members, provides evidence that a technology system speaks an open standards language. Certification testing questions may be directed to dev@reso.org.
RESO closed 2025 as a stronger, more capable and more globally relevant organization, marked by measurable financial growth and meaningful progress across standards, education and international collaboration. The Books RESO continued a seven-year trend line of annual...
RESO conferences put some of the brightest minds in real estate together in order to solve today’s greatest technology challenges. You won't find a better value for a week filled with actionable insights and networking with industry leaders and peers.
RESO is an independent, nonprofit standards body formed to develop data standards and processes that create efficiencies for all participants in real estate transactions.
Discover 5 reasons to attend RESO 2026 Spring San Antonio. Engage with peers and contribute to important standards work.
5 Reasons to Attend the RESO 2026 Spring Conference in San Antonio
RESO tracks individual MLS systems for certification purposes and as a service to the real estate industry via its Unique Organization Identifier (UOI) service. The UOI is a frequently updated ID system that tracks active and inactive MLSs as well as REALTOR® associations, technology vendors, pooled platforms and more.
RESO closed 2025 as a stronger, more capable and more globally relevant organization, marked by measurable financial growth and meaningful progress across standards, education and international collaboration.
RESO certification is the process of testing technology systems to ensure that they conform to the capabilities required in ratified standards. Organizations that pass the testing process and accept the terms and conditions of certification receive RESO certification endorsements, and their resulting reports are published at certification.reso.org. More Info on Certification