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DNS plays an ever-crucial behind-the-scenes role on the internet. And here are some tools you can use to check if it’s working the way intended.

The phonebook of the internet (aka DNS) needs to work correctly for you to enjoy the internet.

And that’s just not true for an average internet user, but a misconfigured DNS can be catastrophic for any online business.

For instance, one can poison DNS records (aka Pharming attack) to send your users to phishing sites, doing irreparable reputation damage to your business.

The best way to remain alert is with DNS monitoring tools. Regardless, DNS monitoring is for the high-stakes project, and realistically, webmasters don’t give them a thought.

In most such cases, one can check the DNS health with these listed tools. It will help you troubleshoot (if required) and ensure safety for you and your users.


DNS Spy is a monitoring service that you can also use to generate an instant report detailing DNS connectivity, performance, security, etc.

These sections entail:

  • Connectivity: available nameservers and their response
  • Performance: nameservers response time
  • Security: checks for best practices for server location, domain name, DNSSEC, etc.
  • Records: mentions all publicly available DNS records

Besides, every report mentions the warnings, recommendations, and achievements for individual sections, which is excellent for resolving issues.


Within a split second, IntoDNS verifies significant DNS issues regarding nameservers, SOA, mail servers, and CNAME.

The report is generally very detailed, including nameservers’ IP, their response, NS records, etc., with comments. Besides, the report mentions SOA serial number, refresh interval, retry value, TTL, expire number, etc.

Additionally, you get to see the mail servers’ IPs, their validity, associated records, and any possible mismatch or duplication.


MXToolBox has hundreds of tests for your domain health, including vital DNS checks. Straightaway, you get what needs your attention at the top, followed by what’s working great.

Personally, I liked this approach as it takes the clutter out and serves the best in short. Besides, it also lists the possible remedies for course correction.

Moreover, you have tons of other checks, such as for blacklisting, server, and general domain hiccups.


dig, a DNS lookup utility, is available on UNIX-based operating systems to query the DNS from the terminal itself.

Dig has quick-to-memorize commands one can use to verify specific DNS records. It works to find out nameservers, mail servers, traceroute, reverse DNS lookup, and more.

Here is a simple query output:

root@trends:~# dig

; <<>> DiG 9.11.3-1ubuntu1.11-Ubuntu <<>>
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28778
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

; EDNS: version: 0, flags:; udp: 65494
;				IN	A

;; ANSWER SECTION:			300	IN	A			300	IN	A

;; Query time: 13 msec
;; WHEN: Sun Feb 23 19:27:49 UTC 2020
;; MSG SIZE  rcvd: 67

In addition, one can get responses from particular servers about the DNS configurations and not rely on any single pre-decided server as with other tools.

To get started, you can check these important dig command examples.

DNS Checker

The best use case of DNS Checker is to verify worldwide DNS propagation with a single click.

However, you also have access to their vast repository of tools, including the DNS ones, which offer in-depth lookups for specific DNS records.

The only downside I could see is you have to check individual records one at a time. However, DNS Checker is more flexible in giving you a choice to select the preferable server for the queries.

In addition, you can also run an entire domain health checkup at once. This inspects for SPF, blacklisting, and DNS specifics for nameservers, SOA, mail servers, etc.

Geekflare DNS Lookup

Our own DNS lookup reveals all DNS records for any domain you enter.

The report includes A, TXT, MX, SPF, etc., with their associated details, such as TTL and priority. The primary use case of this tool is to verify a recent DNS record update.

Signing Off!

We hope this will assist you in resolving DNS issues. But since this can be a complicated subject for many, this DNS course would come in handy.

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  • Hitesh Sant
    Hitesh works as a senior writer at Geekflare and dabbles in cybersecurity, productivity, games, and marketing. Besides, he holds master’s in transportation engineering. His free time is mostly about playing with his son, reading, or lying…

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