SEV3 — ElevatedCLOSEDInfrastructureUnverified21d ago

Simultaneous Critical Network Alerts Across Charter/Spectrum, Lumen/CenturyLink, and Verizon in the US

Sentinel monitoring is flagging simultaneous Severity-8 ping-based alerts across three major US backbone and last-mile carriers — Charter/Spectrum (AS20115), Lumen/CenturyLink (AS3356), and Verizon (AS701) — with no corroborating news coverage at this time. The concurrent nature of alerts across unrelated autonomous systems is the key concern: coincident degradation on multiple carriers could indicate a shared upstream event, widespread routing instability, or a monitoring infrastructure issue. Given the US hosts roughly 3M contact-center seats and 40M knowledge-worker seats dependent on these carriers for voice, data, and remote access, operations leaders should verify agent connectivity, VoIP quality, and cloud platform reachability across key hubs including New York, Los Angeles, and Dallas-Fort Worth while monitoring for confirmation.

Impact Summary

Sentinel monitoring is flagging simultaneous Severity-8 ping-based alerts across three major US backbone and last-mile carriers — Charter/Spectrum (AS20115), Lumen/CenturyLink (AS3356), and Verizon (AS701) — with no corroborating news coverage at this time. The concurrent nature of alerts across unrelated autonomous systems is the key concern: coincident degradation on multiple carriers could indicate a shared upstream event, widespread routing instability, or a monitoring infrastructure issue. Given the US hosts roughly 3M contact-center seats and 40M knowledge-worker seats dependent on these carriers for voice, data, and remote access, operations leaders should verify agent connectivity, VoIP quality, and cloud platform reachability across key hubs including New York, Los Angeles, and Dallas-Fort Worth while monitoring for confirmation.

Domain
Infrastructure
Region
United States, US
Opened By
watchkeeper
Jun 20, 2026, 01:30 PM UTC
Validated By
auto
Jun 20, 2026, 01:30 PM UTC
Event Cluster
6 events
OVIX Score
10.0
Closed
watchkeeper-auto(resolved)
Jun 22, 2026, 02:00 PM UTC

Timeline6

Incident openedby watchkeeperJun 20, 2026, 01:30 PM UTC
Declared from 3 signals. OVIX 8. News 0. BPO 3. LLM-confirmed.
Severity validatedby autoJun 20, 2026, 01:30 PM UTC
Auto-validated: SEV3 per policy.
Note addedby watchkeeperJun 20, 2026, 07:31 PM UTC
Merged new cluster (3 signals, OVIX 9) — same domain/region, >=3 shared title words, active <24h.
Note addedby watchkeeperJun 20, 2026, 08:01 PM UTC
Merged new cluster (3 signals, OVIX 9) — same domain/region, >=3 shared title words, active <24h.
Note addedby watchkeeperJun 21, 2026, 01:30 AM UTC
Merged new cluster (3 signals, OVIX 9) — same domain/region, >=3 shared title words, active <24h.
Incident closedby watchkeeperJun 22, 2026, 02:00 PM UTC
Revalidation: no new material events for 36h. Auto-closed.

Evidence / Why this?

Traced to source — read-only
Evidence is not yet available for this incident. Older incidents predate the traceability layer; newly declared incidents will show why they were declared, why their severity was set, geo provenance, and their sources here.

Related Signals15

[Austin] infrastructure 10.0 — Cloudflare (AS13335) — critical alert via ping-slash24sentinel20d ago[US] infrastructure 9.0 — Google (AS15169) — critical alert via ping-slash24sentinel20d ago[US] infrastructure 9.0 — Cox (AS7843) — critical alert via ping-slash24sentinel20d ago[US] infrastructure 9.0 — Cloudflare (AS13335) — critical alert via ping-slash24sentinel20d ago[Austin] infrastructure 10.0 — Google (AS15169) — critical alert via ping-slash24sentinel20d ago[US] infrastructure 9.0 — Google (AS15169) — critical alert via ping-slash24sentinel20d ago[US] infrastructure 9.0 — Cloudflare (AS13335) — critical alert via ping-slash24sentinel20d ago[US] infrastructure 9.0 — Cox (AS7843) — critical alert via ping-slash24sentinel20d ago[US] infrastructure 9.0 — Cox (AS7843) — critical alert via ping-slash24sentinel21d ago[US] infrastructure 9.0 — Cloudflare (AS13335) — critical alert via ping-slash24sentinel21d ago[US] infrastructure 9.0 — Google (AS15169) — critical alert via ping-slash24sentinel21d ago[US] infrastructure 9.0 — Power outage: California — 74,973 customers affected (3.1x above 24h avg of 24,117)sentinel21d ago[US] infrastructure 8.0 — Lumen/CenturyLink (AS3356) — critical alert via ping-slash24sentinel21d ago[US] infrastructure 8.0 — Charter/Spectrum (AS20115) — critical alert via ping-slash24sentinel21d ago[US] infrastructure 8.0 — Verizon (AS701) — critical alert via ping-slash24sentinel21d ago

Affected Regions

US