DOMAIN RECORD
safetytraining.colostate.edu
- First observed
- 2026-08-26T18:04:37.673Z
- Last observed
- 2026-08-26T18:59:49.829Z
- Observation runs
- 4
- Certificates observed
- 4
- Change events
- 6
MONITORING STARTED
No historical certificate record was available when this domain was admitted. OMSHIFT has been observing public Certificate Transparency logs directly since 2026-08-26T18:04:06.353Z — 3 observations and 6 change events recorded since.
OBSERVATION RAIL
- 2026-08-26T18:04:37.673ZMonitoring from 2026-08-26T18:04:37.673ZNo historical reconstruction — observed only from this point forward.
- 2026-08-26T18:04:38.516ZIssuer differs from previous observed issuance
- 2026-08-26T18:39:41.147ZIssuer differs from previous observed issuance
- 2026-08-26T18:39:41.913ZIssuer differs from previous observed issuance
CERTIFICATE DELTA
Observed 2026-08-26T18:39:41.913Z
PREVIOUS
C=US, O=Let's Encrypt, CN=YR2
1 SAN
ISSUER issuer differs from previous observed issuance
OBSERVED
C=US, O=Let's Encrypt, CN=YE1
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=YE1
- Validity
- 2026-08-26T17:40:31Z → 2026-11-24T17:40:30Z
- First observed
- 2026-08-26T18:39:41.913Z
- Last observed
- 2026-08-26T18:49:43.408Z
- Source
- OMSHIFT CT Monitor (forward observation)
SAN NAMES (1)
safetytraining.colostate.edu
View certificate evidence →FORWARD OBSERVATION
- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-08-26T17:40:28Z → 2026-11-24T17:40:27Z
- First observed
- 2026-08-26T18:39:41.147Z
- Last observed
- 2026-08-26T18:49:28.704Z
- Source
- OMSHIFT CT Monitor (forward observation)
SAN NAMES (1)
safetytraining.colostate.edu
View certificate evidence →FORWARD OBSERVATION
- Issuer
- C=US, O=Let's Encrypt, CN=YE2
- Validity
- 2026-08-26T17:03:46Z → 2026-11-24T17:03:45Z
- First observed
- 2026-08-26T18:04:38.516Z
- Last observed
- 2026-08-26T18:05:34.383Z
- Source
- OMSHIFT CT Monitor (forward observation)
SAN NAMES (1)
safetytraining.colostate.edu
View certificate evidence →FORWARD OBSERVATION
- Issuer
- C=US, O=Let's Encrypt, CN=YR2
- Validity
- 2026-08-26T17:03:36Z → 2026-11-24T17:03:35Z
- First observed
- 2026-08-26T18:04:37.673Z
- Last observed
- 2026-08-26T18:59:49.829Z
- Source
- OMSHIFT CT Monitor (forward observation)
SAN NAMES (1)
safetytraining.colostate.edu
View certificate evidence →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.