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By Matt Rideout
DNS Check now supports two features for Enterprise accounts that make it easier to work as a team: Team Members and Additional Email Recipients. Team Members lets multiple people log in and work with your DNS records using their own credentials. Additional Email Recipients sends notification emails to people who need to stay informed but don't need to log in.
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By Matt Rideout
DNS Check's load balancer monitoring now supports CIDR notation, making it practical to monitor domains served by CDNs and cloud providers that use large IP pools. Instead of listing every possible IP address a provider might return, you can enter CIDR ranges like 104.16.0.0/13 and DNS Check will verify that responses fall within those ranges.
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By Matt Rideout
We're kicking off 2026 by shipping improvements that make DNS troubleshooting faster and more intuitive. When a DNS check fails, you'll now see exactly what needs to change to fix it, and you'll have complete visibility into your DNS record behavior over time.
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By Matt Rideout
We're excited to announce one of our most frequently requested features: inverted DNS checks. This new capability allows you to detect when DNS records are created (whether they're planned infrastructure changes or rogue records) and prevent unwanted values from appearing in your DNS configuration.
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By Matt Rideout
On October 19-20, 2025, Amazon Web Services (AWS) experienced a significant outage (AWS status) affecting its US-EAST-1 region in northern Virginia. The root cause was DNS resolution failures for DynamoDB’s API endpoints, which cascaded across AWS’s interconnected services, disrupting major platforms including Snapchat, McDonald’s, Disney+, Roblox, Coinbas, Reddit, and Amazon’s own services.
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By Matt Rideout
Early on October 20, 2025, Amazon Web Services (AWS) experienced a significant outage affecting its US-EAST-1 region in northern Virginia. The root cause was DNS resolution failures for DynamoDB’s API endpoints, which cascaded across AWS’s interconnected services.
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By Matt Rideout
Happy New Year! We want to kick off 2021 by announcing some improvements to DNS Check.
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By Matt Rideout
Back in 2016, we added support for monitoring wildcard DNS records. Wildcard DNS records are used to serve requests for otherwise non-existent domain names. Today we’re pleased to announce that we’ve extended our support for using wildcards in DNS records monitoring. DNS Check now allows you to specify a wildcard (*) in place of some DNS record values, such as an A record’s IP address to indicate that any value is acceptable, but the record must exist.
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By Matt Rideout
We just finished refactoring the code that we use for integrating DNS Check with services like Slack and PagerDuty. It felt good to take some of the bespoke code that had accumulated over the past couple years as integrations got added in and generalize it.
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DNS Check enables you to easily monitor, share and troubleshoot DNS records. Import your entire zone file, and get notified if a record changes.
At the heart of DNS Check is a DNS record checking tool, which compares the DNS records that you enter to what DNS servers are returning in response to queries. If there's an issue, the record checking tool will enable you to quickly identify it.
DNS Checks Made Easy:
- Monitor: Monitor DNS records and name servers for changes and lookup failures. Get notified if something changes. Import your entire zone file or just those records that you want to be monitored.
- Share: Request DNS record updates by sharing a link that shows which records are posted correctly, and which aren't. Get notified as updates are detected.
- Troubleshoot: Quickly troubleshoot and resolve DNS issues. If something's broken, our DNS checker allows you to identify whether it's there's a DNS issue involved and if so, what to fix.