The IISL Standing Committee on the Status of International Agreements Relating to Activities in Outer Space has published its annual report. Established by the IISL Board of Directors in 1987, the Committee prepares reports setting out data on the signatories and parties of major multilateral outer space agreements, as well as basic data concerning declarations of outer space principles adopted by the UN General Assembly. The current report contains information on 16 agreements, including data concerning changes of their status since 1999. The agreements included in the report, and their status, are believed to be valid at least as of 1 January 2019.
You can find the 2019 Standing Committee report here.