BIND 9

isc.org · checked 30 Sept 2026

#10 · DNS Server Software

Visit isc.org ↗ Alternatives BIND 9 vs Knot Resolver

How it plugs in

—Public API

NoOpen source

YesFree tier

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BIND 9 is DNS name server software used by enterprises and service providers as a platform for distributed computing systems.

Pricing

BIND 9 open sourceMPL 2.0 licensed software · community support via public mailing listFree
ISC support subscriptionAnnual software support service; pricing based on deployment size and service level · Gold, Silver, Bronze, and Basic levels · Gold, Silver, and Bronze include support response targets · Silver and above include BIND -S subscriber editionOn request

As isc.org lists them, checked 30 Sept 2026.

Near it

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: isc.org
Price: Free tier
Free trial: Not stated
DNS roles: BIND is used for authoritative DNS and recursive resolver services, including root-zone and top-level-domain publishing, large hosting zones, and enterprise internal and external zones.
Download options: ISC provides source downloads, packages for Ubuntu, CentOS/Fedora and Debian, and an official Docker image.
Founded: 1994
Headquarters: Newmarket, New Hampshire, USA
Integrations: BIND can be monitored with ISC's Stork tool, which retrieves BIND configuration and zone information through its agent using RNDC and AXFR.
Intended users: ISC describes BIND use across hosting providers, enterprises, service providers, carriers, ISPs, universities, and government organizations.
Notable limit: ISC's vulnerability policy covers only the latest monthly releases of supported stable maintenance versions and excludes development and end-of-life versions.
Open source license: BIND 9 is open source software licensed under MPL 2.0.
Protocol security: The feature matrix lists DNSSEC validation, DNS over HTTPS, and DNS over TLS among BIND 9 features.
Security response: ISC says it assesses vulnerabilities using CVSS and publishes patched versions of supported affected code with public security disclosures.
Stork limitation: Stork currently reads and displays BIND information but does not modify BIND.
Support: ISC offers paid support with service levels and private expert support, while community help is available through public user mailing lists.

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