x.com
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-20T20:02:21.737Z
- Observation runs
- 2
- Certificates observed
- 26
- Change events
- 3
25 historical certificate observations were recorded in the baseline. Change tracking is active from this point forward. Baseline evidence is not treated as historical change events. 1 post-baseline observation and 3 change events have been recorded since.
- 2026-08-16T11:32:02.180ZBaseline established25 certificates observed
- 2026-08-20T19:03:35.428ZIssuer differs from previous observed issuance
- 2026-08-20T19:03:35.428ZSAN set differs from previous observed issuance+3 · −4
- added *.twitter.com
- added isolation.atla.twitter.com
- added twitter.com
- removed *.live.x.com
- removed *.watch.x.com
- removed cdn.syndication.x.com
- removed click.send.x.com
HISTORICAL BOOTSTRAP — historical evidence imported via SSLMate CT Search when this record was established. FORWARD OBSERVATION — observed directly from public CT logs by OMSHIFT.
- Issuer
- C=US, O=Let's Encrypt, CN=YE2
- Validity
- 2026-08-20T18:01:57Z → 2026-11-18T18:01:56Z
- First observed
- 2026-08-20T19:03:35.428Z
- Last observed
- 2026-08-20T20:02:21.737Z
- Source
- OMSHIFT CT Monitor (forward observation)
*.twitter.com, *.x.com, isolation.atla.twitter.com + 2 more
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-08-14T17:47:59Z → 2026-11-12T17:47:58Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.live.x.com, *.watch.x.com, *.x.com + 3 more
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-07-30T01:09:09Z → 2026-10-28T01:09:08Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.x.com, x.com
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-07-28T04:07:21Z → 2026-10-26T04:07:20Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.atla.twitter.com, *.atla.x.com, *.cftls.t.co + 32 more
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-07-28T03:39:33Z → 2026-10-26T03:39:32Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.atla.twitter.com, *.atla.x.com, *.cftls.t.co + 32 more
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-07-28T02:44:18Z → 2026-10-26T02:44:17Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.twitter.com, *.twitterintegration.com, *.watch.x.com + 4 more
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR1
- Validity
- 2026-07-25T04:27:55Z → 2026-10-23T04:27:54Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.twitter.com, *.x.com, twitter.com + 1 more
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-07-24T18:22:49Z → 2026-10-22T18:22:48Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.twitter.com, *.x.com, twitter.com + 1 more
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR1
- Validity
- 2026-07-24T18:22:46Z → 2026-10-22T18:22:45Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.twitter.com, *.x.com, isolation.atla.twitter.com + 2 more
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-07-24T02:31:24Z → 2026-10-22T02:31:23Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.x.com, x.com
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-07-24T00:41:40Z → 2026-10-22T00:41:39Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.x.com, x.com
View certificate evidence →- Issuer
- C=US, O=Let's Encrypt, CN=YR1
- Validity
- 2026-07-21T15:33:07Z → 2026-10-19T15:33:06Z
- First observed
- 2026-08-16T11:32:02.180Z
- Last observed
- 2026-08-16T11:32:02.180Z
- Source
- SSLMate CT Search (historical bootstrap)
*.twitter.com, *.x.com, twitter.com + 1 more
View certificate evidence →View full certificate archive (26 total) →
Certificate Transparency observation does not prove a certificate is currently served by this domain, and SAN presence does not prove ownership. See /method for the full trust contract.