Log status
Every usable Certificate Transparency log is read from two directions at once: the head follows new entries as they are published, while the backfill works forward from entry zero. When the two meet, that log is fully covered.
58Logs
17,541,582Entries read
51,953,229,691Entries remaining
51,970,090,720Entries published
| Log | Type | Tree size | Backfilled | Head | Coverage |
|---|---|---|---|---|---|
| Cloudflare 'Nimbus2026' | rfc6962 | 6,266,776,557 | 0 | 6,266,776,557 | 0% |
| Google 'Argon2026h2' log | rfc6962 | 2,927,766,108 | 0 | 2,927,765,409 | 0% |
| Google 'Argon 2026H1' log | rfc6962 | 2,807,501,296 | 0 | 2,807,501,296 | 0% |
| TrustAsia 'log2026b' | rfc6962 | 2,721,708,781 | 0 | 2,721,708,781 | 0% |
| TrustAsia 'log2026a' | rfc6962 | 2,700,938,323 | 0 | 2,700,938,323 | 0% |
| Google 'Xenon 2026H1' log | rfc6962 | 2,542,706,695 | 0 | 2,542,706,695 | 0% |
| Google 'Xenon2026h2' log | rfc6962 | 2,484,911,977 | 0 | 2,484,911,977 | 0% |
| Sectigo 'Tiger2026h2' | rfc6962 | 2,224,398,678 | 0 | 2,224,398,678 | 0% |
| Elephant 2026h1 | rfc6962 | 2,054,351,766 | 0 | 2,054,351,766 | 0% |
| Tiger 2026h1 | rfc6962 | 2,002,576,673 | 0 | 2,002,576,673 | 0% |
| DigiCert 'Wyvern2026h2' | rfc6962 | 1,881,882,584 | 0 | 1,881,880,964 | 0% |
| DigiCert 'Sphinx2026h2' | rfc6962 | 1,862,756,327 | 0 | 1,862,754,450 | 0% |
| Sectigo 'Elephant2026h2' | rfc6962 | 1,844,456,830 | 0 | 1,844,456,830 | 0% |
| Gouda 2026h1 | tiled | 1,544,673,809 | 250,000 | 1,544,673,809 | 0% |
| IPng GmbH 'Halloumi2026h1' | tiled | 1,467,336,774 | 200,000 | 1,467,336,774 | 0% |
| DigiCert 'Wyvern 2026h1' Log | rfc6962 | 1,217,972,030 | 0 | 1,217,972,030 | 0% |
| Google 'ParcelYard2026h2' log | tiled | 1,188,334,318 | 950,000 | 1,188,334,318 | 0% |
| Google 'PlumbersArms2026h2' log | tiled | 1,187,985,714 | 800,000 | 1,187,985,714 | 0% |
| DigiCert 'Sphinx 2026h1' Log | rfc6962 | 1,100,493,968 | 0 | 1,100,493,968 | 0% |
| IPng Networks 'Halloumi2026h2a' | tiled | 1,037,397,333 | 0 | 1,037,397,333 | 0% |
| IPng Networks 'Gouda2026h2' | tiled | 1,026,640,889 | 0 | 1,026,640,889 | 0% |
| log.willow.ct.letsencrypt.org/2026h1 | tiled | 926,067,188 | 0 | 926,067,188 | 0% |
| log.sycamore.ct.letsencrypt.org/2026h1 | tiled | 926,062,388 | 0 | 926,062,388 | 0% |
| Let's Encrypt 'Sycamore2026h2' | tiled | 785,268,617 | 0 | 785,268,617 | 0% |
| Let's Encrypt 'Willow2026h2' | tiled | 759,083,647 | 0 | 759,083,647 | 0% |
| Cloudflare 'Raio2026h2a' log | tiled | 653,163,327 | 2,100,000 | 653,163,327 | 0% |
| Geomys 'Tuscolo2026h2' | tiled | 645,671,964 | 2,900,000 | 645,671,964 | 0% |
| Cloudflare 'Raio2026h1a' log | tiled | 520,044,330 | 1,100,000 | 520,044,330 | 0% |
| Cloudflare 'Nimbus2027' | rfc6962 | 323,229,278 | 0 | 323,229,278 | 0% |
| Google 'Argon2027h1' | rfc6962 | 280,129,808 | 0 | 280,129,808 | 0% |
| Tuscolo2026h1 | tiled | 229,562,122 | 2,900,000 | 229,562,122 | 1% |
| Sectigo 'Tiger2027h1' | rfc6962 | 219,501,055 | 0 | 219,500,650 | 0% |
| Let's Encrypt 'Sycamore2027h1' | tiled | 213,510,984 | 0 | 213,510,984 | 0% |
| Let's Encrypt 'Willow2027h1' | tiled | 203,466,905 | 0 | 203,466,905 | 0% |
| Sectigo 'Elephant2027h1' | rfc6962 | 203,168,135 | 0 | 203,168,135 | 0% |
| Google 'Xenon2027h1' | rfc6962 | 184,565,559 | 0 | 184,565,559 | 0% |
| DigiCert 'Wyvern2027h1' | rfc6962 | 114,812,006 | 0 | 114,811,561 | 0% |
| TrustAsia 'HETU2027' | rfc6962 | 108,268,609 | 0 | 108,268,609 | 0% |
| TrustAsia Luoshu2027 | tiled | 102,892,183 | 0 | 102,890,496 | 0% |
| Cloudflare 'Raio2027h1a' log | tiled | 98,386,782 | 1,450,000 | 98,386,782 | 1% |
| DigiCert 'sphinx2027h1' | rfc6962 | 95,372,318 | 0 | 95,372,161 | 0% |
| IPng Networks 'Halloumi2027h1' | tiled | 67,335,398 | 0 | 67,335,398 | 0% |
| IPng Networks 'Gouda2027h1' | tiled | 63,704,841 | 0 | 63,704,841 | 0% |
| Geomys 'Tuscolo2027h1' | tiled | 58,386,909 | 2,950,000 | 58,386,909 | 5% |
| Google 'ParcelYard2027h1' log | tiled | 47,341,013 | 850,000 | 47,341,013 | 1% |
| Google 'PlumbersArms2027h1' log | tiled | 47,289,087 | 350,000 | 47,289,087 | 0% |
| Sectigo 'Elephant2027h2' | rfc6962 | 29,314 | 0 | 29,314 | 0% |
| Sectigo 'Tiger2027h2' | rfc6962 | 28,672 | 0 | 28,672 | 0% |
| DigiCert 'Wyvern2027h2' | rfc6962 | 28,635 | 0 | 28,635 | 0% |
| DigiCert 'sphinx2027h2' | rfc6962 | 28,561 | 0 | 28,561 | 0% |
| Geomys 'Tuscolo2027h2' | tiled | 23,554 | 23,554 | 23,554 | complete |
| Cloudflare 'Raio2027h2a' log | tiled | 17,858 | 17,858 | 17,858 | complete |
| IPng Networks 'Gouda2027h2' | tiled | 17,480 | 0 | 17,480 | 0% |
| Let's Encrypt 'Willow2027h2' | tiled | 17,411 | 0 | 17,411 | 0% |
| Let's Encrypt 'Sycamore2027h2' | tiled | 17,384 | 0 | 17,384 | 0% |
| IPng Networks 'Halloumi2027h2' | tiled | 17,241 | 0 | 17,241 | 0% |
| Google 'PlumbersArms2027h2' log | tiled | 6,374 | 6,374 | 6,374 | complete |
| Google 'ParcelYard2027h2' log | tiled | 6,353 | 6,353 | 6,353 | complete |