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 separated by slash optionally.
Timezone conversion
Pass YYYY-MM-DDTHH:MM-$fromCity-$toCity (two letter country codes separated by slash optionally).
dig 2023-05-28T14:00-mumbai-paris/fr.time @dns.toys
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-$ToCurrency. Daily rates are from exchangerate.host.
IP echo
dig -4 ip @dns.toys
Echo your IPv4 address.
dig -6 ip @dns.toys
Echo your IPv6 address.
Number to words
dig 987654321.words @dns.toys
Convert numbers to English words.
Usable CIDR Range
dig 10.0.0.0/24.cidr @dns.toys
dig 2001:db8::/108.cidr @dns.toys
Parse CIDR notation to find out first and last usable IP address in the subnet.
Number base conversion
dig 100dec-hex.base @dns.toys
dig 755oct-bin.base @dns.toys
Converts a number from one base to another. Supported bases are hex, dec, oct and bin.
Pi
dig pi @dns.toys
dig pi -t txt @dns.toys
dig pi -t aaaa @dns.toys
Print digits of Pi. Yep.
English dictionary
dig fun.dict @dns.toys
dig big-time.dict @dns.toys
Get dictionary definitions for English words. Powered by WordNet®. Replace spaces with dashes.
Rolling dice
dig 1d6.dice @dns.toys
dig 3d20/2.dice @dns.toys
The number of dice to roll, followed by d, followed by the number of sides for each dice, like in tabletop RPG games.
Optionally suffix by /$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).
Epoch/Unix timestamp conversion
dig 784783800.epoch @dns.toys
Convert an epoch/unix timestamp into a human readable date. Supports Unix timestamps in s, ms, µs and ns.
Calculate aerial distance
dig A12.9352,77.6245/12.9698,77.7500.aerial @dns.toys
Calculate aerial distance between a lat-long pair
Generate UUIDs
dig 5.uuid @dns.toys
Generate N UUIDs (v4).
Solve Sudoku
dig 002840003.076000000.100006050.030080000.007503200.000020010.080100004.000000730.700064500.sudoku @dns.toys
Solve Sudoku. send sudoku puzzle string in row major format, empty cells should have value 0 (v4).
Developer Excuse
dig excuse @dns.toys
Return a developer excuse.
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"
Zsh
Add this zsh alias to your ~/.zshrc file.
The + args show cleaner output from dig.
alias dy="dig +short @dns.toys"
Then, use the dy command as a shortcut.
dy berlin.time
dy mumbai.weather
dy 100USD-INR.fx