Tracking 57,069 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 |
|---|---|---|---|---|---|---|
| gmail.com | 9,773 | 5 | 0 / 9,773 exp | 2020-01-29 | UP | |
| amazon.com | 5,953 | 834 | 0 / 5,953 exp | 2020-01-27 | UP | |
| openai.com | 5,105 | 435 | 0 / 5,105 exp | 2025-08-06 | UP | |
| cloudflare.com | 4,978 | 3,423 | 0 / 4,978 exp | 2020-01-26 | UP | |
| amazonaws.com | 4,445 | 2,068 | 0 / 4,445 exp | 2020-01-29 | UP | |
| salesforce.com | 3,701 | 1,237 | 0 / 3,701 exp | 2020-01-27 | UP | |
| msn.com | 3,644 | 1,225 | 0 / 3,644 exp | 2022-06-10 | UP | |
| meta.com | 3,420 | 38 | 0 / 3,420 exp | 2022-12-13 | UP | |
| docker.com | 3,387 | 278 | 331 / 3,056 exp | 2026-06-03 | UP | |
| netflix.com | 2,956 | 630 | 0 / 2,956 exp | 2020-01-27 | UP | |
| apple.com | 2,561 | 2,618 | 0 / 2,561 exp | 2020-01-27 | UP | |
| hashnode.com | 2,459 | 72 | 176 / 2,283 exp | 2026-06-03 | UP | |
| netlify.com | 1,646 | 93 | 145 / 1,501 exp | 2026-06-03 | UP | |
| lyft.com | 915 | 46 | 37 / 878 exp | 2026-06-03 | UP | |
| youtube.com | 787 | 23 | 0 / 787 exp | 2020-01-27 | UP | |
| ycombinator.com | 626 | 32 | 48 / 578 exp | 2026-06-03 | UP | |
| reddit.com | 561 | 38 | 66 / 495 exp | 2026-05-31 | UP | |
| bitbucket.io | 152 | 1 | 93 / 59 exp | 2026-05-26 | UP | |
| airbnb.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| akamai.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| anthropic.com | 0 | 0 | 0 / 0 exp | — | DOWN | |
| azure.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| bing.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| blob.core.windows.net | 0 | 0 | 0 / 5,008 exp | 2020-09-01 | UNCERTAIN | |
| blogspot.com | 0 | 0 | 0 / 804 exp | 2020-01-24 | UNCERTAIN | |
| cloudfront.net | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| cohere.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| dev.to | 0 | 0 | 0 / 0 exp | — | DOWN | |
| digitalocean.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| discord.com | 0 | 0 | 117 / 1,585 exp | 2026-06-02 | UNCERTAIN | |
| dropbox.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| duckduckgo.com | 0 | 0 | 0 / 0 exp | — | 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.com | 0 | 0 | 62 / 948 exp | 2026-06-03 | UNCERTAIN | |
| github.io | 0 | 0 | 0 / 5,055 exp | 2021-10-16 | UNCERTAIN | |
| gitlab.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| gitlab.io | 0 | 0 | 12 / 427 exp | 2026-05-02 | UNCERTAIN | |
| google.com | 0 | 0 | 0 / 1,152 exp | 2020-07-26 | UNCERTAIN | |
| hashicorp.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| heroku.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| huggingface.co | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| icloud.com | 0 | 0 | 0 / 767 exp | 2021-03-31 | UNCERTAIN | |
| instagram.com | 0 | 0 | 0 / 0 exp | — | DOWN | |
| kubernetes.io | 0 | 0 | 0 / 0 exp | — | DOWN | |
| linkedin.com | 0 | 0 | 0 / 623 exp | 2020-01-27 | UNCERTAIN | |
| live.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| me.com | 0 | 0 | 0 / 0 exp | — | UNCERTAIN | |
| medium.com | 0 | 0 | 34 / 486 exp | 2026-05-28 | UNCERTAIN |