A and AAAA records
The IPv4 and IPv6 addresses the domain points to — the foundation of where your site is served from.
Free DNS Lookup Tool
Enter a domain to look up its DNS records: A and AAAA addresses, MX mail servers, NS nameservers, TXT, CNAME, and SOA — all in one query.
Look up DNS records
Enter a domain (for example, northduty.com). NorthDuty queries DNS and returns the records it finds.
Free check. No signup. Results are not published or indexed.
How NorthDuty DNS monitoring works
Enter a domain (for example, northduty.com). NorthDuty queries DNS and returns the records it finds. Recurring checks are configured inside the NorthDuty app.
What this DNS lookup reports
A single query returns the record types you need most when diagnosing DNS and mail issues.
MX records
The mail servers that accept email for the domain, with their priorities, so you can diagnose delivery issues.
NS and SOA
The authoritative nameservers and the start-of-authority record, useful when verifying a DNS migration.
TXT and CNAME
TXT records (SPF, DKIM, verification) and CNAME aliases that often cause subtle configuration problems.
Why check DNS records
Most 'the site is down' incidents that aren't the server are DNS — misconfigured records, stale caches, or a missed migration.
- Confirm a domain points to the right IP addresses
- Verify MX records after changing email providers
- Check SPF/DKIM TXT records for email deliverability
- Confirm nameservers after a DNS migration
- Spot CNAME chains that break subdomains
How the DNS lookup works
No signup — enter a domain and get its records immediately.
1
Enter a domain
Type any domain name. NorthDuty queries public DNS for the common record types.
2
We resolve the records
A, AAAA, MX, NS, TXT, CNAME, and SOA are looked up in parallel.
3
You get the results
Records are grouped by type so you can scan them quickly — no report snapshot is stored.
4
Monitor it continuously
NorthDuty's health checks include DNS so a broken or changed record is caught on a schedule.
Go Beyond One-Off Checks
Use the tool preview for a quick answer, then move into recurring monitoring for your most important pages and journeys.
Feature
DNS Monitoring
Monitor DNS resolution with NorthDuty as part of website health checks, so domain and resolution issues are visible before important pages become unreachable.
Explore DNS MonitoringFeature
Uptime Monitoring
Monitor uptime every 5 minutes by default with HTTP, SSL, DNS, blank-page detection, broken resources, JavaScript errors, and API call tracking.
Explore Uptime MonitoringArticle
SSL Certificate Monitoring
Learn how SSL certificate monitoring works inside NorthDuty website health checks.
Read SSL Certificate MonitoringPricing
Pricing
NorthDuty pricing for website monitoring: Free, $29 Starter, $79 Pro, $199 Business, and $499 Enterprise plans.
Compare pricing plansFrequently Asked Questions
Answers about this diagnostic preview and when to move into recurring monitoring.
Is this DNS lookup free?
Yes. The DNS lookup tool is free and requires no signup. Enter a domain and you get its records immediately.
Which record types does it check?
A, AAAA, MX, NS, TXT, CNAME, and SOA — the record types most useful for diagnosing website and email issues.
Why do I see no records for a type?
Not every domain has every record type. An empty result for, say, CNAME or MX usually just means none are configured.
Does this show propagation across resolvers?
This tool queries from the server's resolver. DNS changes can take time to propagate globally, so results may differ from other locations during a change.
Call To Action
Start monitoring your website with NorthDuty today.
A one-off DNS lookup catches today's problem. NorthDuty watches DNS continuously and alerts you when records change or break.
Start on the free plan — add your base URL and monitoring starts in minutes.