1
Also covers dns lookup and security tools · same kind of website
DNS Watch looks up DNS records and measures lookup performance across resolvers.
Alternatives
The Best NSLookup Alternatives in 2026
24 alternatives1 free · 7 open source
Looking for something like NSLookup? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 1 are free or have a free plan and 7 are open source.
Look up DNS records and nameservers with NSLookup.io’s network utilities.
Top picks at a glance
First suggestionDNS WatchDNS Watch looks up DNS records and measures lookup…Free or freemium optionOTP AuthManage two-factor authentication codes with OTP Auth, an…Open source optionMess With DNSExperiment with DNS records and behavior using the…Another optionOnline ToolsOnline Tools offers browser-based utilities for hashing…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | DNS Watch | Paid | Not stated | Web |
| 2 | Online Tools | — | Not stated | Web |
| 3 | WhatsMyDNS | — | Not stated | Web |
| 4 | OpenCVE | — | Not stated | Linux, Web |
| 5 | mess with dns | — | Not stated | Web |
| 6 | DNSDumpster | — | Not stated | Web |
| 7 | SSLMate CAA | — | Not stated | Web |
| 8 | GNUnet | — | Not stated | Web |
| 9 | Nmap | — | Not stated | Linux, Web, Windows |
| 10 | Zeek | — | Not stated | Web |
All NSLookup alternatives
2
Online Tools
emn178.github.io/online-toolsAlso covers security tools · same kind of website
Online Tools offers browser-based utilities for hashing, encoding, encryption, formatting, compression, file processing, and more.
3
WhatsMyDNS
whatsmydns.netAlso covers security tools · same kind of website
WhatsMyDNS checks DNS record propagation across global resolvers for record types including A, AAAA, MX, and TXT.
4
OpenCVE
app.opencve.io/cveAlso covers security tools · same kind of website
OpenCVE tracks vulnerabilities, vendors, products, and weaknesses through searchable security records.
5
mess with dns
messwithdns.netAlso covers security tools · same kind of website
mess with dns provides an interface for viewing and editing DNS records.
6
DNSDumpster
dnsdumpster.comAlso covers security tools · same kind of website
DNSDumpster searches domain records and related hosts for domain research and reconnaissance.
7
SSLMate CAA
sslmate.com/caaAlso covers security tools · same kind of website
SSLMate CAA helps generate CAA DNS records and explains which certificate authorities support the record type.
8
GNUnet
gnunet.org/enAlso covers security tools · same kind of website
GNUnet provides tools for decentralized communication through a secure peer-to-peer networking framework.
9
Nmap
nmap.orgAlso covers security tools · same kind of website
Discover hosts and map networks with Nmap, a network exploration and security scanning tool.
10
Zeek
zeek.orgAlso covers security tools · same kind of website
Zeek analyzes network activity through an open source monitor with a flexible scripting language.
11
Kismet
kismetwireless.netAlso covers security tools · same kind of website
Kismet monitors and captures Wi-Fi network traffic, with wireless intrusion detection and wardriving features.
12
ntop
ntop.orgAlso covers security tools · same kind of website
Explore ntop’s network visibility and cybersecurity offering; the supplied page gives little further detail.
13
Test-IPv6
test-ipv6.comAlso covers security tools · same kind of website
Test-IPv6 checks whether a browser and network connection can reach IPv6 resources.
14
Spur
spur.usAlso covers security tools · same kind of website
Spur analyzes internet infrastructure and network signals to help investigators interpret obfuscated connections.
15
UUID Generator
toolkitvault.com/uuid-generatorAlso covers security tools
This online generator creates UUIDs in versions 1, 3, 4, 5, 6, and 7 for use in applications and data records.
16
Also covers security tools · open source
Experiment with DNS records and behavior using the interactive Mess With DNS project.
17
Also covers security tools · same kind of website · free plan
Manage two-factor authentication codes with OTP Auth, an iOS app listed on the App Store.
18
Also covers security tools · same kind of website
Generate secure SSL configurations for selected web, database, and mail software.
19
Also covers security tools · open source
Configure network activity rules through Windows Filtering Platform with Simplewall.
20
Also covers security tools · open source
Set network rules by application or globally with Fort Firewall for Windows.
21
Also covers security tools · open source
Scan TCP ports with masscan, an asynchronous scanner designed for large network ranges.
22
Also covers security tools · open source
Monitor network traffic with Sniffnet, a desktop network analysis application.
23
Also covers security tools · open source
Scan applications, APIs, networks, DNS, and cloud configurations for vulnerabilities using Nuclei.
24
Also covers security tools · open source
Monitor network activity by process in a terminal with RustNet, which includes packet inspection.
No alternatives match this filter.
Alternatives to similar tools
OTP Auth24 alternativesMozilla SSL24 alternativesWhatsMyDNS24 alternativesZeek24 alternativesMess With DNS24 alternativesGNUnet24 alternatives
TopicSecurity Tools · 202 sites Best-of list8 Best Free Authenticator Apps for Codes and Recovery ListingNSLookup details
What is the best alternative to NSLookup?
Based on features, tags and platforms, the closest alternatives to NSLookup are DNS Watch, Online Tools, and WhatsMyDNS.
Is there a free alternative to NSLookup?
Yes. OTP Auth is free or offer a free plan.
Are there open-source alternatives to NSLookup?
Yes: Mess With DNS, Simplewall, Fort, and masscan.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative