2026 Network Outage Report: What ThousandEyes Data Means for Hosting Buyers

The latest Cisco ThousandEyes internet health check, compiled by Network World, shows that global network outages remain a weekly reality for hosting operators and site owners. During the week of August 17–23, 2026, ThousandEyes recorded 534 outage events across ISPs, public cloud, collaboration, and edge networks—a 2% drop from the prior week, but U.S. public cloud network outages jumped 22%. Notable incidents included a massive Arelion Tier 1 transit outage on August 21 affecting dozens of countries and a Cox Communications ISP disruption on August 17. For European and global hosting buyers, these figures are not abstract: they directly affect VPS latency, WordPress availability, and migration risk. This editorial breaks down the trends, flags recurring weak points, and outlines where operators should invest in redundancy.

Global Outage Volume: ISP Stability Improves While Cloud Incidents Climb

ThousandEyes counts outage events across four categories: ISP networks, public cloud provider networks, collaboration app networks, and edge networks such as DNS, CDN, and security-as-a-service. The weekly totals fluctuate sharply, but the August 17–23 snapshot tells a clear story of divergence.

Globally, the 534 outages were down 2% from 546 the week before (August 10–16). Inside that number, ISP outages fell from 298 to 252 worldwide (a 15% week-over-week drop) and from 169 to 148 in the U.S. (12% lower). That looks like good news for downstream hosting providers that lease bandwidth from regional ISPs.

Public cloud, however, moved the opposite direction. Global cloud-network outages rose from 162 to 189 (17% increase), and U.S. cloud-network outages climbed from 143 to 174—a 22% spike. Collaboration-app outages were negligible (one global, zero U.S.).

Zoom out, and the volatility is obvious. The week of June 1–7 recorded 483 global outages, up 69% from the prior week, with U.S. ISP outages jumping 97%. As recently as December 29–January 4, global volume was 199, with U.S. ISP outages at just 26. The trajectory since early 2026 has been a slow grind upward in cloud-category incidents even as legacy ISP routing stabilizes.

For hosting buyers, the practical read is this: the transit layer feeding your datacenter is moderately healthier than early-year highs, but the hyperscaler and edge layers you depend on for managed VPS, object storage, and CDN are increasingly noisy. If your WordPress stack sits on a single public-cloud region, your risk is now weighted more toward provider-internal networking than last-mile ISP failure.

Tier 1 Transit Disruptions: Arelion, Cogent, Zayo and the Chicago Pattern

The notable outages in the ThousandEyes data repeatedly involve Tier 1 transit carriers, and a surprising number originate or expand through nodes in Chicago, Illinois.

On August 21, Arelion (formerly Telia Carrier, headquartered in Stockholm) suffered a disruption first observed at 9:25 PM EDT, centered on Chicago nodes. Within five minutes, Atlanta joined; later Seattle, Dallas, San Jose, Sweden, and the U.K. were affected. The event lasted one hour 21 minutes spread over a three-hour ten-minute window and impacted customers and downstream partners across the U.S., France, Singapore, New Zealand, India, Germany, the Netherlands, and more than 20 other regions. Arelion had a similar Chicago-centric event on July 2 (51 minutes over 1h50m) and on June 2 (15 minutes).

Cox Communications, a U.S. ISP, had a 24-minute outage on August 17 starting from Chicago nodes, reaching Mexico, the U.K., Austria, Canada, Germany, and Denmark. Cogent Communications showed repeated short bursts: June 27 (Atlanta, Washington, Miami, Frankfurt), May 25 (Dallas, Houston, Denver), and April 8 (Mexico City, Laredo, McAllen, Austin). Zayo Group, a Boulder-based Tier 1, logged outages on August 5 (Seattle), July 13 (Phoenix, Dallas), and several others.

The operational lesson is that many North American transit fabrics converge on Chicago peering points. If your VPS or dedicated server provider uses a single upstream that rides Arelion or Cogent through Chicago, you inherit that blast radius. Hosting buyers should ask providers for their ASN diversity and whether they maintain independent Tier 1 relationships or just resell one transit spine.

Cloud Network and Control-Plane Failures Hit Managed Hosting

Beyond raw transit, the report captures cloud-provider network events that cascade into hosted workloads. On July 23, Microsoft experienced a West US region network outage: a routine maintenance bug removed IP routes between the datacenter and WAN on more devices than intended. It lasted about one hour three minutes, with nodes spreading from San Jose, Los Angeles, Dallas, New York, Atlanta, and Cleveland to additional U.S. locations, impacting downstream partners in Canada, the Philippines, India, and elsewhere. Microsoft rolled back the change and restored services.

For a more detailed walkthrough of this part of the topic, read Cloudflare report: DDoS attacks explode in 2025 – What hosting customers should know and do.

A separate Network World report dated August 11, 2026 describes an Azure outage where a misconfiguration in Microsoft-managed storage accounts triggered cascading failures across virtual machine operations, managed identities, and developer workflows for over 10 hours. That incident is not in the weekly ThousandEyes counts as a “network outage event” but explains why public cloud outage anxiety is rising among enterprise buyers.

Edge providers are not immune. Cloudflare’s February 20 BYOIP incident withdrew customer IP advertisements due to an automated maintenance bug, causing connection timeouts for 1h40m. For hosting buyers using Cloudflare in front of cPanel or WordPress servers, that meant visible downtime even though origin boxes were fine.

The tradeoff is clear: managed cloud and edge services reduce operational toil but concentrate risk in vendor control planes. A VPS on a stable hypervisor can still go dark if the provider’s network route advertisement or identity layer fails.

Building Hosting Resilience: Routing Diversity, Monitoring, and Migration Checks

Given the data, hosting operators and website owners should architect for recurrent, short-tier transit loss and occasional long cloud-control faults.

First, favor hosting providers with multi-homed BGP—at least two independent Tier 1 transits—and verify they are not both anchored in the same metro (e.g., Chicago-only). For European readers, check whether your provider peers at AMS-IX, DE-CIX, or LINX rather than relying on a single upstream resold from a U.S. carrier.

Second, implement external monitoring. ThousandEyes is enterprise-grade, but self-hosted probes or inexpensive synthetic monitors from multiple regions (e.g., U.S., EU, Asia) will catch latency and packet-loss shifts that your own office network misses. Watch for “network healthy but users see errors”—a sign of backend or DNS faults.

Third, reduce DNS TTLs for critical A/AAAA and MX records to allow faster failover if your edge or CDN provider blinks. Pair that with offsite backups stored outside your primary cloud account, because a 10-hour identity outage can block console access even when data is safe.

Finally, read SLA terms carefully. Many public-cloud network outage counts exclude managed control-plane defects; credits may be hard to claim. For mission-critical WordPress or e-commerce, a hybrid model—dedicated server plus cloud burst—can contain blast radius.

Key Takeaways / Practical Checklist

Audit your hosting provider’s transit diversity; confirm they are not solely dependent on Chicago-centered Arelion or Cogent paths.
Lower DNS TTLs on critical records to speed recovery during edge or ISP outages.
Monitor latency and reachability from at least three geographic vantage points, not just your own network.
For cloud WordPress or VPS, spread workloads across availability zones or consider a hybrid dedicated server.
Track public cloud SLAs closely; note that “network outage” metrics often exclude control-plane misconfigurations.
Maintain offline backups and a documented failover plan; short transit blips differ from 10-hour cloud faults.

The 2026 ThousandEyes outage record makes one point undeniable: ISP routing is slowly stabilizing, but cloud and edge networks are now the dominant source of hosting risk. Buyers who treat multi-region redundancy, independent transit, and active monitoring as defaults—rather than upsells—will absorb the next Arelion or Azure event with a shrug instead of a support ticket.

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