robots.txt & llms.txt across the Tranco top 1M
Data as of 2026-07-25 · robots.txt via Common Crawl CC-MAIN-2026-25 + our polite crawl · llms.txt via our polite crawl · Tranco list ID not recorded for this snapshot · crawls: 2026-09-07 · 2026-08-02 · 2026-07-25 · 2026-07-17 687,794 robots.txt fetches · 491,025 parsed · 54,000 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 (2026-07-25). 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 1,00082.6%
Top 10,00077.3%
Top 100,00074.9%
Top 1,000,00071.9%
absent (404)
data table
Top 1,0005.6%
Top 10,0004.8%
Top 100,0006.8%
Top 1,000,0008.4%
disallow-all
data table
Top 1,00021.9%
Top 10,0003.3%
Top 100,0002.3%
Top 1,000,0002.4%
allow-all
data table
Top 1,00016.2%
Top 10,00014.0%
Top 100,00019.6%
Top 1,000,00025.3%
wildcard * UA
data table
Top 1,00098.2%
Top 10,00096.4%
Top 100,00095.5%
Top 1,000,00094.4%
declares a sitemap
data table
Top 1,00075.5%
Top 10,00066.3%
Top 100,00066.6%
Top 1,000,00063.5%

Full data table

Rank tier sample status 200status 404disallow allallow allwildcard uasitemap
Top 1,000 582 82.6% 5.6% 21.9% 16.2% 98.2% 75.5%
Top 10,000 5,816 77.3% 4.8% 3.3% 14.0% 96.4% 66.3%
Top 100,000 52,157 74.9% 6.8% 2.3% 19.6% 95.5% 66.6%
Top 1,000,000 432,470 71.9% 8.4% 2.4% 25.3% 94.4% 63.5%

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.