Cern is down? Current uptime and performance status in dec 2025

Health Metrics in last 24 hours

100 %

Availability

1.25 s

Response Time

0 s

Down time

Performance Metrics in last 24 hours

2.86 s

Speed Index

49 / 100

Perf. Score

100 / 100

SEO Score

96 / 100

PWA Score

80 / 100

Accessibility

UX Metrics

Information not available

SSL Certificate Details checked 6 hours ago

Validity

Valid

Expiry

345 days

Valid till

Tue Nov 24 2026

Domains

Issued for

CERN Organisation Européenne pour la Recherche Nucléaire, Meyrin, Genève, CH

Issued by

Sectigo Limited, GB

Cern has uptime of 100 % with 0 incidents in the last 24 hours. The performance score is 49 along with speed index of 2.86 seconds. Cern has SEO score of 100 and PWA score of 96. Cern certificate is good and will expire in 345 days. Realtime Performance and uptime status contains uptime monitoring metrics, performance monitoring, chrome ux metrics, global uptime and SSL certificate details.