Watch the global routing system
Every provider announces its networks to the rest of the Internet. ESNO follows those announcements through public research collectors and notices when a regional network disappears or loses a path.
Eastern Sierra Network Observatory
An independent record of how the region stays connected.
ESNO measures the Internet connectivity of Inyo County, Mono County and the High Desert from the outside and from within, around the clock, and publishes what it sees: which networks are reachable, where there is trouble, and for how long.
This page was last updated Nov 10, 1:25 PM PST and has not refreshed since. The monitoring system may be
offline, so the statuses shown may be out of date.
Operating normally
No problems seen. All 6 measured networks look normal.
Updated Nov 10, 1:25 PM PST · View status
- 9Internet providers monitored
- 2Areas measured from inside
- 7Test points online now
- 24/7Automated, updated every 5 minutes
Why an observatory
Communities east of the Sierra Nevada and across the High Desert sit a long way from the major Internet hubs of Los Angeles and the Bay Area. Homes, clinics, schools, businesses and emergency services here depend on a small number of long routes and a handful of providers.
When a connection fails, residents and local agencies have had no independent, public record of what happened: which networks were affected, which areas, and for how long. Each provider reports on its own service, in its own way, and regional patterns are hard to see.
ESNO exists to keep that record. It is built on public measurement infrastructure and open methods, and it publishes the same picture for everyone at the same time.
What ESNO does
Four steps, running continuously.
Test from inside the region
Small volunteer-hosted probes on local connections measure reachability and delay from the region outward, so a problem seen in routing can be confirmed on the ground.
Separate signal from noise
A status changes to an outage only when independent signals agree. Related problems across providers are grouped into a single incident with a start and an end.
Report in plain language
The status page shows current conditions, seven days of history and recent incidents. The same data is available in a machine-readable file for agencies and researchers.
Where it looks
Coverage follows the networks that serve these communities, not county lines.
Inyo County
The Owens Valley communities, including Bishop, Big Pine, Independence and Lone Pine.
Mono County
Mammoth Lakes, June Lake, Lee Vining, Bridgeport and the communities along U.S. 395.
High Desert
Victorville and neighboring communities in San Bernardino County.
How it is run
The commitments behind every number on this site.
Independent
ESNO is not affiliated with, funded by, or operated for any Internet provider, equipment vendor or government agency.
Evidence first
Every published figure comes from collected measurements. Where there is no data, the site says so instead of guessing.
Careful with what it publishes
The site reports outages and overall health. Technical weaknesses found in a provider's network are reported privately to that provider first, never posted here.
Respectful of privacy
ESNO does not inspect anyone's traffic and cannot see individual homes, phones or accounts.
Take part
Better coverage depends on people in the region.
Host a measurement probe
Libraries, county offices, schools, businesses and residents can host a small RIPE Atlas probe on their connection. It uses very little bandwidth, never looks at your traffic, and takes about 15 minutes to set up.
Network operators
If you run a network that serves the region, ESNO welcomes corrections, context about planned work, and a contact for reporting what it observes.
Agencies and researchers
The status page and its data file are free to use for situational awareness and study. Tell us what would make them more useful to you.
Get in touch: info@esnodata.org