Nexus49 began as a systematic survey of the open web — a field operation to chart and document active websites across the full range of online activity. The premise was simple: most web directories list sites mechanically; Nexus49 approaches its index as an expedition log, recording each entry with care and intent. The index is organised across twenty-two field stations, each covering a distinct sector of the web. From financial services and clinical health to adventure travel and industrial manufacturing, the stations map the terrain of the contemporary internet in structured, navigable form. Each logged entry has been individually reviewed before charting. The 830 sites currently in the Nexus49 index were surveyed across a period of sustained field work. Entries range from niche specialist operators to broad-reach platforms, and span multiple countries, languages, and regulatory environments. The index does not rank or score sites — it simply charts them. New additions to the log are accepted through the open submission field. Any operator running an active site in a relevant category may submit for review. Submissions that meet the index criteria are logged within the station most suited to their activity. The Nexus49 expedition log is maintained as a free public resource. There is no fee to submit or to use the index. It exists as a practical navigation aid for anyone seeking to locate active, operating sites across the documented sectors of the web.