Mergers, acquisitions, splits and renames as a family tree: parents above children, each family a block, wide generations wrapped into columns so lines stay short. Hover a box to highlight its full lineage (upstream + downstream); click to lock, Esc or click background to clear. Border colour: green = active, red = inactive/absorbed, grey = unknown. Drag to pan, scroll to zoom, double-click a box for details. Type to search, then Enter to focus that ISP's family; clear the search to show all. ISPs with no recorded transition are hidden by default (tick unconnected to show them).

Each bar is an ISP's lifespan (birth → death/merger), flowing through time left to right. Vertical lines show acquisitions/mergers at their year. Green = still active, red = inactive/absorbed, grey = status unknown. Click a bar to lock its lineage (upstream + downstream); click again to open.