DNS Without the Internet


Recently someone sent a DNS query over a telegram, so I wondered, what other ways can I send DNS request without using the internet to send them? On the Cloudflare website there’s a section thats called Fun with DNS, and it includes ways like Google Sheets, SMS, Telegram (not a literal telegram), Tor, Twitter, and Email. But noticably, all of these methods required the internet to be sent. So I decided to try to send DNS queries using non-internet mediums.

The Solution

When I first started thinking about this project, I looked in the comments of the twitter post above, someone asked whether you could send DNS requests using postcards, and they got a reply saying they could as long as it wasn’t a sealed envelope. But, sending an envelope is easier, more secure, and allows for me to type my letter, so I decided that I should try using mail.

Sending a Request

I went to type up a document to mail for a request. But I knew I couldn’t just send A holliger.me, because on its own, it doesn’t make sense, and theres nothing fun in just sending two words, so I wrote some more. For the letter, I decided to write something like this: I wrote up a letter and it came out something like this:


I’ve heard that supports many different ways of sending requests, am I able to request using DNS over USPS?

If so, I would like to know the records for the following:

TXT holliger.me

Lukas Holliger
[my address]

I then folded it, wrote the Cloudflare Texas address, wrote my address for return, then I put a stamp on it and sent it off.

I also decided to add something fun to the TXT of holliger.me, saying something like this:

Hello there, does Cloudflare support Merch over USPS? My systems support Mens XL :P

A Reply

I received some confirmation about my letter being received when I saw some traffic on this blog, and I also received a message from a friend showing me a picture of my letter. After a few weeks of waiting, a box arrived at my house, addressed from Cloudflare Inc in Texas.
Upon opening the box, I was greeted with some packing paper and this sheet and a shirt!