At a Glance
- •Your website can be down in one country and up in another. CDN edge failures, DNS propagation delays, ISP routing issues, and geo-blocking mistakes all cause regional outages that single-location monitoring will miss.
- •Multi-location monitoring checks your site from servers in different countries simultaneously and only alerts when multiple locations confirm a failure, reducing false alarms significantly.
- •For most websites, 3 to 5 monitoring locations provide solid global coverage. Match locations to your top traffic sources by country.
- •Free tools like check-host.net and whatsmydns.net work for one-time checks, but continuous monitoring is needed to catch outages as they happen.
- •Notifier includes HTTP, DNS, and SSL monitoring free for up to 10 URLs on all plans. Multi-country monitoring locations are coming soon. Paid plans start at $4/month.
Your website can be down in Tokyo and perfectly fine in New York. If your monitoring only checks from one location, you will never know about the outage in Tokyo until your users tell you. That could be hours later.
Multi-country monitoring checks your website from servers in different geographic regions simultaneously. When one region detects a problem, you get alerted immediately. This guide explains why regional outages happen, how to test for them, and how to set up continuous monitoring from multiple countries.
Why Regional Outages Happen
A "global" website is actually a chain of regional systems. Any link in that chain can break independently. Here are the most common causes of outages that affect some countries but not others.
CDN Edge Server Failures
Content delivery networks like Cloudflare, AWS CloudFront, and Fastly route users to the nearest edge server. If an edge server in Frankfurt goes down, German users see errors while US users are unaffected. CDN providers typically have dozens of edge locations, and failures at individual nodes happen more often than full outages.
DNS Propagation Delays
When you change DNS records (switching hosting providers, updating nameservers, or changing IP addresses), the update propagates across global DNS servers at different speeds. Some regions resolve your domain to the new IP within minutes. Others may take up to 48 hours. During this window, some users reach your site and others don't.
ISP Routing Issues
Internet traffic between countries passes through undersea cables and peering points. When a major ISP has a routing problem or a peering agreement dispute, traffic from specific regions gets dropped or rerouted through congested paths. Your server is fine, but users in affected regions experience timeouts or extreme slowness.
Geo-blocking Mistakes
Firewall rules, WAF configurations, or CDN geo-restrictions can accidentally block legitimate traffic from entire countries. A misconfigured IP allowlist, an overly aggressive bot protection rule, or an incorrect geo-IP database entry can make your site inaccessible from specific regions without triggering any server-side errors.
Regional Cloud Provider Outages
Cloud providers like AWS, Google Cloud, and Azure operate in geographic regions. An outage in AWS us-east-1 doesn't affect eu-west-1. If your site is hosted in a single region, users near that region experience the outage while users routed through healthy CDN caches may still see your site. The result is inconsistent availability depending on where the user is located.
Real World Regional Outages
Regional outages are not theoretical edge cases. They happen regularly to major platforms.
Cloudflare Edge Failures (Multiple Incidents, 2022 to 2025)
Cloudflare has experienced several incidents where specific data centers went offline while others continued operating normally. In June 2022, a network configuration change caused outages in 19 data centers, affecting users in specific cities while other regions remained unaffected. Single-location monitoring from an unaffected region would have shown 100% uptime during the entire incident.
AWS us-east-1 Outage (December 2021)
A major AWS outage in the us-east-1 region took down services for Netflix, Disney+, Slack, and thousands of smaller apps. Sites hosted in other AWS regions or with multi-region failover continued operating. Monitoring from Europe would have shown green status while US East Coast users experienced complete downtime.
Fastly CDN Outage (June 2021)
A software bug in Fastly's configuration caused 85% of their network to return 503 errors. The outage affected major sites including Reddit, Amazon, and The New York Times. Some regions recovered faster than others because the fix rolled out progressively across edge locations, creating a 30 to 45 minute window where availability varied by country.
In every one of these incidents, the affected companies had internal monitoring. The problem is that monitoring from a single location creates blind spots. If your monitor happens to be in a healthy region, it reports "all clear" while thousands of users are locked out.
How to Test Your Website From Multiple Countries (Manual Methods)
Before setting up continuous monitoring, you can perform one-time checks to see how your site looks from different countries.
Free Online Tools
These tools check your website from multiple global locations and report the results:
- check-host.net: Tests HTTP, ping, DNS, and TCP from 40+ worldwide locations. Shows response times and status codes from each location.
- uptrends.com/tools/uptime: Free website speed test from 200+ global checkpoints. Shows waterfall charts per location.
- whatsmydns.net: Specifically for DNS propagation. Shows how your DNS records resolve from servers across the globe. Essential when migrating hosting or changing nameservers.
- GeoPeeker: Takes screenshots of your website from multiple countries so you can see exactly what users in each region see, including any geo-blocked content.
Command Line Testing
If you have access to servers in different regions (VPS instances, cloud VMs), you can run checks directly:
# Check response time and status code from a remote server
ssh user@eu-server "curl -s -o /dev/null -w 'Status: %{http_code}\nTime: %{time_total}s\n' https://yoursite.com"
# Check DNS resolution from a specific DNS server (Google DNS in different regions)
dig @8.8.8.8 yoursite.com +short
dig @8.8.4.4 yoursite.com +short
# Test with a specific DNS resolver to simulate a different region
curl --resolve yoursite.com:443:RESOLVED_IP -s -o /dev/null -w "%{http_code}" https://yoursite.comManual testing works for spot checks and troubleshooting, but it has obvious limitations: you only catch problems when you think to check, and you can't test continuously from 10 countries at once. That's where automated multi-location monitoring comes in.
Why Continuous Multi-Country Monitoring Matters
The difference between one-time testing and continuous monitoring is the difference between checking your front door lock once and having a security camera running 24/7.
| Approach | Regional Outage Detection | False Alarm Reduction | Continuous Coverage |
|---|---|---|---|
| Single-location monitoring | No | No | Yes |
| Manual multi-location checks | Yes | Yes | No |
| Automated multi-location monitoring | Yes | Yes | Yes |
Multi-location monitoring also reduces false alarms significantly. When a single-location monitor loses connectivity (because of a network issue at the monitoring provider, not your server), it triggers a false downtime alert. With multi-location monitoring, the system requires failures from multiple locations before alerting, so a network blip at one checkpoint doesn't wake you up at 3 AM.
What to Monitor From Multiple Countries
Not every check needs multi-location coverage. Focus on the areas where regional differences actually matter.
HTTP/HTTPS Availability
The core check. Is your website returning a 200 status code from each monitoring location? This catches CDN failures, geo-blocking, and regional server outages.
Response Time by Region
A page that loads in 200ms from New York might take 3 seconds from Sydney. Multi-location monitoring tracks response time per region so you can identify where your CDN is underperforming or where you need additional edge servers.
DNS Resolution
DNS issues are inherently regional because different DNS resolvers cache records independently. Monitoring DNS resolution from multiple countries catches propagation delays, stale cache entries, and misconfigured regional DNS records.
SSL Certificate Validity
SSL certificates are typically consistent globally, but CDNs that terminate SSL at the edge can serve different certificates from different locations. If an edge server has a stale or expired certificate, only users routed to that edge see the error.
Multi-Location Monitoring Tools Compared
Most uptime monitoring tools offer some form of multi-location checking, but the number of locations, configuration options, and pricing vary significantly.
| Tool | Monitoring Locations | Free Plan | Paid From | SSL Monitoring |
|---|---|---|---|---|
| Notifier | Multi-country (coming soon) | 10 monitors | $4/mo | All plans |
| UptimeRobot | Multiple (auto-selected) | 50 monitors (non-commercial) | $8/mo | All plans |
| Better Stack | Multiple regions | 10 monitors | $29/mo (per responder) | All plans |
| Pingdom | 100+ probe servers | None | $15/mo | All plans |
| StatusCake | 30+ locations | 10 monitors | $6/mo | Paid plans |
| HetrixTools | 20+ locations | 15 monitors | $5/mo | All plans |
| Uptime Kuma | Single (self-hosted) | Unlimited (self-hosted) | Free (server costs) | Yes |
Self-hosted tools like Uptime Kuma give you complete control but only monitor from wherever you host them. To get multi-location coverage with Uptime Kuma, you would need to deploy instances in multiple regions and manage them separately. Hosted services handle this automatically.
How to Set Up Multi-Country Monitoring
Setting up multi-location monitoring follows the same basic process regardless of which tool you use. Here's a step-by-step walkthrough.
Step 1: Identify Your Key Markets
Start with the countries where you have the most users. Check your analytics to find your top 5 to 10 traffic sources by country. If 80% of your traffic comes from the US, UK, and Germany, make sure those three regions have monitoring coverage at minimum.
Step 2: Choose Your Monitoring Locations
Select monitoring locations that match your key markets. For global coverage, aim for at least:
- North America: US East Coast and US West Coast
- Europe: Western Europe (UK, Germany, or Netherlands)
- Asia Pacific: Singapore, Tokyo, or Sydney
Four to five locations give you solid global coverage. Adding more locations provides finer granularity but increases monitoring costs on some platforms.
Step 3: Configure Alert Thresholds
The most important setting for multi-location monitoring is the confirmation threshold. Configure your monitor to require failures from at least 2 or 3 locations before sending an alert. This eliminates false positives caused by transient network issues at a single checkpoint.
Tip: Balance speed with accuracy
Requiring more locations to confirm a failure reduces false alarms but delays your alert. For critical sites, require 2 out of 4 locations. For less critical monitoring, require 3 out of 5. The right balance depends on how sensitive you are to false alarms versus delayed notifications.
Step 4: Set Up Alerts
Configure alerts through multiple channels so regional outages don't slip through. For critical sites, use email plus SMS or phone call alerts. For less critical monitoring, Slack notifications may be sufficient.
With Notifier, you can set up email, SMS, phone call, and Slack alerts on every plan, including the free tier. Multi-country monitoring locations are coming soon, and existing users will get access automatically when the feature launches.
Step 5: Create a Status Page
A public status page gives your users a place to check during regional outages. When users in Asia report problems but your US-based team sees everything working fine, a status page that shows regional status helps everyone understand the situation.
Frequently Asked Questions
How many monitoring locations do I need?
For most websites, 3 to 5 locations provide sufficient global coverage. Choose locations that match your key traffic sources. A US-only business might use 2 US locations plus 1 European location for diversity. A global SaaS product should aim for at least one location per major continent where it has users.
Does multi-location monitoring cost more?
It depends on the tool. Some services include multi-location monitoring on all plans at no extra cost. Others charge per monitoring location or only offer multiple locations on higher-tier plans. Notifier will include multi-country monitoring as part of its standard plans when the feature launches.
Can I monitor from specific countries?
Most monitoring tools let you choose from a list of available probe locations rather than arbitrary countries. The number of options varies: some offer 5 to 10 regions, others offer 30+. If you need monitoring from a specific country for compliance or regulatory reasons, check the tool's location list before signing up.
What if my site is only for one country?
Even if your users are all in one country, monitoring from at least 2 locations in that country (or nearby) is worthwhile. It reduces false alarms because a failure must be confirmed by multiple checkpoints. It also catches CDN edge failures within your country that a single monitoring point would miss.
How do I know if a regional outage is on my end or the network?
When multi-location monitoring shows failures from some locations but not others, run a traceroute from the affected region to identify where packets are being dropped. Tools like check-host.net provide traceroute from multiple global locations. If the failure is at a network hop before your server, the problem is likely a transit provider or CDN edge failure, not your origin server.
Should I set up separate monitors for each location?
No. Use a single monitor that checks from multiple locations simultaneously. This is how most monitoring tools work by default. The tool checks from all configured locations on each cycle and uses the combined results to determine if an alert should fire. Separate monitors for each location would generate redundant alerts and make it harder to correlate regional issues.
