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DNSDataView vs zns: catalog facts
DNSDataView	zns
Free Freeware from NirSoft, free to use and distribute unmodified.	Free The project is distributed under the MIT License at no charge.
Windows	Windows, macOS, Linux, Command line
Bulk lookups for many domains at once Choice of DNS server and reverse PTR lookups	Supports DNSSEC chain-of-trust validation Can trace delegations from root nameservers
Supports Windows XP to Windows 11 only	Limitations not stated
Downloadable app	Downloadable app
Closed source	Open source
License: Freeware	License: MIT
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 4, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.