DOMAIN RECORD
stackoverflow.com
- First observed
- 2026-08-16T11:17:00.741Z
- Last observed
- 2026-08-22T12:57:21.373Z
- Observation runs
- 5
- Certificates observed
- 24
- Change events
- 8
BASELINE ESTABLISHED
20 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. 4 post-baseline observations and 8 change events have been recorded since.
OBSERVATION RAIL
- 2026-08-16T11:17:00.741ZBaseline established20 certificates observed
- 2026-08-22T12:03:57.724ZIssuer differs from previous observed issuance
- 2026-08-22T12:03:57.724ZSAN set differs from previous observed issuance+0 · −1
- 2026-08-22T12:04:08.231ZSAN set differs from previous observed issuance+0 · −1
- 2026-08-22T12:39:12.989ZIssuer differs from previous observed issuance
CERTIFICATE DELTA
Observed 2026-08-22T12:39:12.989Z
PREVIOUS
C=US, O=Let's Encrypt, CN=YE1
1 SAN
ISSUER issuer differs from previous observed issuance
OBSERVED
C=US, O=Let's Encrypt, CN=YR2
1 SAN
LATEST CERTIFICATE EVIDENCE
HISTORICAL BOOTSTRAP — historical evidence imported via SSLMate CT Search when this record was established. FORWARD OBSERVATION — observed directly from public CT logs by OMSHIFT.
FORWARD OBSERVATION
- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-08-22T11:36:03Z → 2026-11-20T11:36:02Z
- First observed
- 2026-08-22T12:39:12.989Z
- Last observed
- 2026-08-22T12:44:29.542Z
- Source
- OMSHIFT CT Monitor (forward observation)
SAN NAMES (1)
stackoverflow.com
View certificate evidence →FORWARD OBSERVATION
- Issuer
- C=US, O=Let's Encrypt, CN=YE1
- Validity
- 2026-08-22T11:36:05Z → 2026-11-20T11:36:04Z
- First observed
- 2026-08-22T12:38:49.658Z
- Last observed
- 2026-08-22T12:39:55.018Z
- Source
- OMSHIFT CT Monitor (forward observation)
SAN NAMES (1)
stackoverflow.com
View certificate evidence →FORWARD OBSERVATION
- Issuer
- C=US, O=Let's Encrypt, CN=YE1
- Validity
- 2026-08-22T11:02:10Z → 2026-11-20T11:02:09Z
- First observed
- 2026-08-22T12:04:08.231Z
- Last observed
- 2026-08-22T12:57:21.373Z
- Source
- OMSHIFT CT Monitor (forward observation)
SAN NAMES (1)
stackoverflow.com
View certificate evidence →FORWARD OBSERVATION
- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-08-22T11:02:06Z → 2026-11-20T11:02:05Z
- First observed
- 2026-08-22T12:03:57.724Z
- Last observed
- 2026-08-22T12:07:01.007Z
- Source
- OMSHIFT CT Monitor (forward observation)
SAN NAMES (1)
stackoverflow.com
View certificate evidence →HISTORICAL BOOTSTRAP
- Issuer
- C=US, O=Let's Encrypt, CN=YE1
- Validity
- 2026-08-15T12:39:06Z → 2026-11-13T12:39:05Z
- First observed
- 2026-08-16T11:17:00.741Z
- Last observed
- 2026-08-16T11:17:00.741Z
- Source
- SSLMate CT Search (historical bootstrap)
SAN NAMES (2)
*.stackoverflow.com, stackoverflow.com
View certificate evidence →HISTORICAL BOOTSTRAP
- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-08-15T12:38:57Z → 2026-11-13T12:38:56Z
- First observed
- 2026-08-16T11:17:00.741Z
- Last observed
- 2026-08-16T11:17:00.741Z
- Source
- SSLMate CT Search (historical bootstrap)
SAN NAMES (2)
*.stackoverflow.com, stackoverflow.com
View certificate evidence →HISTORICAL BOOTSTRAP
- Issuer
- C=US, O=Let's Encrypt, CN=YE2
- Validity
- 2026-08-15T12:27:21Z → 2026-11-13T12:27:20Z
- First observed
- 2026-08-16T11:17:00.741Z
- Last observed
- 2026-08-16T11:17:00.741Z
- Source
- SSLMate CT Search (historical bootstrap)
SAN NAMES (2)
*.stackoverflow.com, stackoverflow.com
View certificate evidence →HISTORICAL BOOTSTRAP
- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-08-15T12:27:18Z → 2026-11-13T12:27:17Z
- First observed
- 2026-08-16T11:17:00.741Z
- Last observed
- 2026-08-16T11:17:00.741Z
- Source
- SSLMate CT Search (historical bootstrap)
SAN NAMES (2)
*.stackoverflow.com, stackoverflow.com
View certificate evidence →HISTORICAL BOOTSTRAP
- Issuer
- C=US, O=Let's Encrypt, CN=YE2
- Validity
- 2026-08-08T16:02:57Z → 2026-11-06T16:02:56Z
- First observed
- 2026-08-16T11:17:00.741Z
- Last observed
- 2026-08-16T11:17:00.741Z
- Source
- SSLMate CT Search (historical bootstrap)
SAN NAMES (1)
stackoverflow.com
View certificate evidence →HISTORICAL BOOTSTRAP
- Issuer
- C=US, O=Let's Encrypt, CN=YR1
- Validity
- 2026-08-08T16:02:26Z → 2026-11-06T16:02:25Z
- First observed
- 2026-08-16T11:17:00.741Z
- Last observed
- 2026-08-16T11:17:00.741Z
- Source
- SSLMate CT Search (historical bootstrap)
SAN NAMES (1)
stackoverflow.com
View certificate evidence →HISTORICAL BOOTSTRAP
- Issuer
- C=US, O=Let's Encrypt, CN=YE1
- Validity
- 2026-08-08T15:48:35Z → 2026-11-06T15:48:34Z
- First observed
- 2026-08-16T11:17:00.741Z
- Last observed
- 2026-08-16T11:17:00.741Z
- Source
- SSLMate CT Search (historical bootstrap)
SAN NAMES (1)
stackoverflow.com
View certificate evidence →HISTORICAL BOOTSTRAP
- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-08-08T15:47:54Z → 2026-11-06T15:47:53Z
- First observed
- 2026-08-16T11:17:00.741Z
- Last observed
- 2026-08-16T11:17:00.741Z
- Source
- SSLMate CT Search (historical bootstrap)
SAN NAMES (1)
stackoverflow.com
View certificate evidence →View full certificate archive (24 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.