Sources
The single source
Everything published here comes from the Visa Bulletin issued monthly by the US Department of State, Bureau of Consular Affairs. Each issue on this site carries the URL it was read from, and every table links back to it so any figure can be checked against the original in one click.
What counts as a source
Only the bulletin itself. Not a mirror, not a law firm summary, not a forum post, and not an earlier version of this site. The build rejects any record whose source is not a travel.state.gov address, so an untraceable figure cannot reach a page.
Corrections
A value that disagrees with its linked issue is a defect. Corrections are made against the official issue and the whole month is re-transcribed rather than patched cell by cell.