dns latency, measured
How fast is your DNS, really?
dnstest queries the big public resolvers straight from your terminal and tells you exactly who answers first — one real round-trip at a time. No config files, no daemons.
capabilities — v1.0
01 · latency
Each resolver gets one real UDP round-trip, timed to the millisecond. No caches, no retry logic polluting the numbers.
02 · flags
--resolvers,
--type,
--count,
--json,
--quiet — everything a script needs.
03 · exit codes
0 answered · 1 nothing
answered · 2 usage error. Grep-friendly, cron-friendly.
04 · zero config
A single Python file, two dependencies, no daemon and no database. Uninstallable by deletion.
installation — 60 seconds
# from pypi (once published)
$ pip install dnstest
# or straight from source
$ git clone https://github.com/brycejensen540/DNStest
$ cd DNStest
$ python -m venv .venv && source .venv/bin/activate
$ pip install .Requires Python 3.10 or newer. The full list of flags lives in the project README.
usage — copy & paste
$ dnstest example.com
$ dnstest example.com --type AAAA
$ dnstest api.example.com --resolvers 9.9.9.9,149.112.112.112
$ dnstest example.com --count 5 --json | jq '.summary'
$ dnstest --list-resolversbuilt-in resolvers — shipped by default
| resolver | address |
|---|---|
| Cloudflare | 1.1.1.1 |
| 8.8.8.8 | |
| Quad9 | 9.9.9.9 |
| OpenDNS | 208.67.222.222 |
Missing your favorite? --resolvers accepts
any list, comma-separated or repeated.