NsLookup.io DNS Monitoring watches domains for changes to their DNS records and sends notifications when records are added, changed, or removed. It supports A, AAAA, MX, CNAME, NS, TXT, SOA, and CAA records, with configurable check intervals and change detection described as real-time. Baseline snapshots provide a comparison point, while timestamped history records changes. Alerts can go to email, Slack, or webhooks, and users can acknowledge expected updates. A web dashboard brings together monitored domains, their current records, recent changes, and alert status. The service is presented for organizations monitoring DNS for security and compliance. Its Free plan includes unlimited domains and configurable intervals, with all features included and no credit card or setup fees; no price is listed. NsLookup says it processes IP addresses to serve requested pages without storing them, though IP query counts may be kept for up to one hour to prevent abuse. Its privacy policy also describes safeguards for information it holds.
Who it is for
It suits organizations that monitor DNS records for security or compliance. It may also fit teams that want alerts through email, Slack, or webhooks and a record of changes.
What is good
- Supports eight DNS record types.
- Configurable checks with real-time change detection described.
- Alerts by email, Slack, or webhooks.
- Snapshots and timestamped change history.
- Free plan includes unlimited domains.
What to know first
- Available on web only.
- No listed price for the Free plan.
Verdict
NsLookup.io combines DNS change alerts with snapshots, a history log, and a dashboard. Its free plan and multiple alert channels may suit organizations tracking record changes.
Get started with NsLookup.io
- Open the NsLookup.io DNS Monitoring website
- Create a Free plan account
- Add domains to monitor
- Choose a checking interval
- Configure email, Slack, or webhook alerts
- Review records and acknowledge expected changes
What the free plan stops at
The Free plan is billed at $0/month and includes all features, unlimited domains, and configurable intervals. No credit card or setup fees are required.
Questions about NsLookup.io
How much does NsLookup.io DNS Monitoring cost?
The Free plan is billed at $0/month.
Which DNS records can it monitor?
It supports A, AAAA, MX, CNAME, NS, TXT, SOA, and CAA records.
Where can alerts be delivered?
Notifications are available through email, Slack, or webhooks.
Does it keep DNS change history?
Yes. Baseline snapshots support comparisons, and timestamped history records changes.
Is NsLookup.io available outside a browser?
The listed platform is web.
NsLookup.io plans and pricing
All plansCompared on DNS monitoring software
- Free plan
- Yes
- Record-change alerts
- Yes
- Alert channels
- email, Slack, webhooks



