Useful utilities and services over DNS

dns.toys is a DNS server that takes creative liberties with the DNS protocol to offer handy utilities and services that are easily accessible via the command line.

Copy and run the below commands to try it out.

World time

dig mumbai.time @dns.toys

dig newyork.time @dns.toys

dig paris/fr.time @dns.toys

Pass city names without spaces suffixed with .time. Pass two letter country codes optionally.

Weather

dig mumbai.weather @dns.toys

dig newyork.weather @dns.toys

dig amsterdam/nl.weather @dns.toys

Pass city names without spaces suffixed with .weather. Pass two letter country codes optionally. This service is powered by yr.no

Unit conversion

dig 42km-mi.unit @dns.toys

dig 32GB-MB.unit @dns.toys

$Value$FromUnit-$ToUnit. To see all 70 available units, dig unit @dns.toys

Currency conversion (forex)

dig 100USD-INR.fx @dns.toys

dig 50CAD-AUD.fx @dns.toys

$Value$FromCurrency-$ToCurrency. Daily rates are from exchangerate.host.

IP echo

dig ip @dns.toys

Echo your IP address.

Number to words

dig 987654321.words @dns.toys

Convert numbers to English words.

Usable CIDR Range

dig 10.0.0.0/24.cidr @dns.toys

dig 2001:db8::/108.cidr @dns.toys

Parse CIDR notation to find out first and last usable IP address in the subnet.

Number base conversion

dig 100dec-hex.base @dns.toys

dig 755oct-bin.base @dns.toys

Converts a number from one base to another. Supported bases are hex, dec, oct and bin.

Pi

dig pi @dns.toys

dig pi -t txt @dns.toys

dig pi -t aaaa @dns.toys

Print digits of Pi. Yep.

English dictionary

dig fun.dict @dns.toys

dig big-time.dict @dns.toys

Get dictionary definitions for English words. Powered by WordNet®. Replace spaces with dashes.

Rolling dice

dig 1d6.dice @dns.toys

dig 3d20/2.dice @dns.toys

The number of dice to roll, followed by d, followed by the number of sides for each dice, like in tabletop RPG games.

Optionally suffix by /$number to add it to the total. For example, a DnD roll like 2d20+3 is written as 2d20/3.

Tossing coin

dig coin @dns.toys

dig 2.coin @dns.toys

Number of coins to toss.

Random number generation

dig 1-100.rand @dns.toys

dig 30-200.rand @dns.toys

Generate a random number in a specified range (inclusive of the range values).

Help

dig help @dns.toys

Lists available services.

Shortcut function

Bash

Add this bash alias to your ~/.bashrc file. The + args show cleaner output from dig.

alias dy="dig +short @dns.toys"

Fish

Add this to your fish config file.

alias dy="dig +noall +answer +additional $argv @dns.toys"

Then, use the dy command as a shortcut.

dy berlin.time

dy mumbai.weather

dy 100USD-INR.fx

Why?

Why not? For fun. I spend a lot of time on the terminal and doing quick unit conversions, weather checks etc. without having to open a clunky search page is useful.