Tracking 27,405 certificates across 84 domains from the public CT logs (crt.sh). We discover subdomains automatically, track issuer history, and surface shadow IT from cert issuance.
| Domain | Certs | Subdomains | Active | Newest | Health | Last Check |
|---|---|---|---|---|---|---|
| cloudflare.com | 4,978 | 3,423 | 0 / 4,978 exp | 2020-01-26 | UP | |
| salesforce.com | 3,701 | 1,237 | 0 / 3,701 exp | 2020-01-27 | UP | |
| netflix.com | 2,956 | 630 | 0 / 2,956 exp | 2020-01-27 | UP | |
| twitter.com | 2,650 | 495 | 0 / 2,650 exp | 2023-11-27 | UP | |
| me.com | 2,588 | 234 | 0 / 2,588 exp | 2025-06-11 | UP | |
| huggingface.co | 2,584 | 136 | 57 / 2,527 exp | 2026-07-10 | UP | |
| live.com | 2,492 | 1,272 | 0 / 2,492 exp | 2020-01-27 | UP | |
| rubygems.org | 2,139 | 24 | 23 / 2,116 exp | 2026-06-30 | UP | |
| github.com | 1,110 | 137 | 100 / 1,010 exp | 2026-07-08 | UP | |
| airbnb.com | 873 | 339 | 153 / 720 exp | 2026-07-14 | UP | |
| ycombinator.com | 651 | 32 | 47 / 604 exp | 2026-07-14 | UP | |
| wordpress.com | 449 | 80 | 28 / 421 exp | 2026-07-06 | UP | |
| wikipedia.org | 234 | 6 | 3 / 231 exp | 2026-06-06 | UP | |
| akamai.com | 0 | 0 | 0 / 1,262 exp | 2020-01-27 | DOWN | |
| amazon.com | 0 | 0 | 0 / 5,953 exp | 2020-01-27 | UNCERTAIN | |
| amazonaws.com | 0 | 0 | 0 / 4,445 exp | 2020-01-29 | DOWN | |
| anthropic.com | 0 | 0 | 521 / 3,283 exp | 2026-07-10 | UNCERTAIN | |
| apple.com | 0 | 0 | 0 / 2,561 exp | 2020-01-27 | DOWN | |
| azure.com | 0 | 0 | 0 / 4,502 exp | 2020-01-27 | DOWN | |
| bing.com | 0 | 0 | 0 / 0 exp | — | DOWN | |
| bitbucket.io | 0 | 0 | 121 / 77 exp | 2026-07-10 | DOWN | |
| blob.core.windows.net | 0 | 0 | 0 / 5,008 exp | 2020-09-01 | DOWN | |
| blogspot.com | 0 | 0 | 0 / 804 exp | 2020-01-24 | UNCERTAIN | |
| cloudfront.net | 0 | 0 | 0 / 6,519 exp | 2020-06-02 | DOWN | |
| cohere.com | 0 | 0 | 3 / 4,654 exp | 2026-05-05 | DOWN | |
| dev.to | 0 | 0 | 75 / 2,350 exp | 2026-07-10 | DOWN | |
| digitalocean.com | 0 | 0 | 276 / 5,657 exp | 2026-06-19 | DOWN | |
| discord.com | 0 | 0 | 182 / 1,524 exp | 2026-07-06 | UNCERTAIN | |
| docker.com | 0 | 0 | 368 / 3,139 exp | 2026-07-06 | UNCERTAIN | |
| dropbox.com | 0 | 0 | 276 / 1,449 exp | 2026-07-01 | DOWN | |
| duckduckgo.com | 0 | 0 | 0 / 4,970 exp | 2022-09-06 | UNCERTAIN | |
| ebay.com | 0 | 0 | 0 / 2,183 exp | 2020-01-27 | UNCERTAIN | |
| facebook.com | 0 | 0 | 0 / 2,093 exp | 2020-09-29 | UNCERTAIN | |
| fastly.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| github.io | 0 | 0 | 0 / 5,055 exp | 2021-10-16 | UNCERTAIN | |
| gitlab.com | 0 | 0 | 0 / 4,134 exp | 2023-09-30 | UNCERTAIN | |
| gitlab.io | 0 | 0 | 17 / 431 exp | 2026-06-17 | UNCERTAIN | |
| gmail.com | 0 | 0 | 0 / 9,773 exp | 2020-01-29 | UNCERTAIN | |
| google.com | 0 | 0 | 0 / 1,152 exp | 2020-07-26 | UNCERTAIN | |
| hashicorp.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| hashnode.com | 0 | 0 | 182 / 2,342 exp | 2026-07-05 | DOWN | |
| heroku.com | 0 | 0 | 0 / 3,711 exp | 2020-08-30 | DOWN | |
| icloud.com | 0 | 0 | 0 / 767 exp | 2021-03-31 | UNCERTAIN | |
| instagram.com | 0 | 0 | 0 / 3,078 exp | 2021-01-18 | UNCERTAIN | |
| kubernetes.io | 0 | 0 | 31 / 1,372 exp | 2026-06-23 | UNCERTAIN | |
| linkedin.com | 0 | 0 | 0 / 623 exp | 2020-01-27 | UNCERTAIN | |
| lyft.com | 0 | 0 | 43 / 887 exp | 2026-07-08 | DOWN | |
| medium.com | 0 | 0 | 40 / 496 exp | 2026-07-08 | UNCERTAIN | |
| meta.com | 0 | 0 | 0 / 3,420 exp | 2022-12-13 | UNCERTAIN | |
| microsoft.com | 0 | 0 | 0 / 5,827 exp | 2020-01-29 | DOWN |