robots.txt & llms.txt across the Tranco top 1M
Data as of 2026-09-07 · robots.txt via Common Crawl CC-MAIN-2026-34 + our polite crawl · llms.txt via our polite crawl · Tranco list XN67N (2026-09-03T22:00:02.533886) · 1,000,000 panel domains · crawls: 2026-09-07 · 2026-08-02 · 2026-07-25 · 2026-07-17 1,212,578 robots.txt fetches · 740,113 parsed · 56,498 llms.txt probes

Does robots.txt practice change with site popularity?

Headline metrics broken down by segment. Toggle the segmentation axis and the weighting. Rank-weighting (FR-23b) weights each domain by 1/Tranco-rank, so a restriction on a top site counts far more than one deep in the tail.

One crawl ingested (2026-09-07). Cross-crawl trend lines appear automatically when the next monthly crawl lands.

Segment: Rank tier Rank decile TLD Overall
Weighting: Raw Rank-weighted
robots.txt returns 200
data table
Top 1,00063.6%
Top 10,00060.8%
Top 100,00058.7%
Top 1,000,00061.0%
absent (404)
data table
Top 1,0005.5%
Top 10,0005.4%
Top 100,0007.5%
Top 1,000,0008.5%
disallow-all
data table
Top 1,00024.2%
Top 10,0003.9%
Top 100,0003.9%
Top 1,000,0008.7%
allow-all
data table
Top 1,00014.4%
Top 10,00016.6%
Top 100,00021.5%
Top 1,000,00025.5%
wildcard * UA
data table
Top 1,00098.2%
Top 10,00094.2%
Top 100,00092.7%
Top 1,000,00090.2%
declares a sitemap
data table
Top 1,00075.3%
Top 10,00064.2%
Top 100,00062.5%
Top 1,000,00060.3%

Full data table

Rank tier sample status 200status 404disallow allallow allwildcard uasitemap
Top 1,000 529 63.6% 5.5% 24.2% 14.4% 98.2% 75.3%
Top 10,000 5,437 60.8% 5.4% 3.9% 16.6% 94.2% 64.2%
Top 100,000 54,147 58.7% 7.5% 3.9% 21.5% 92.7% 62.5%
Top 1,000,000 680,000 61.0% 8.5% 8.7% 25.5% 90.2% 60.3%

Representative llms.txt prevalence uses a different, balanced ten-band cohort and is published separately on the llms.txt page. The generic observed-pool rate remains internal because its top-50k census would overweight the most popular band.