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Paul Mockapetris

Things Paul Says on Podcasts

Where to Find Them

Paul Mockapetris has been a guest on The Peterman Post , The Developing Dev , Command Line Heroes and The Peterman Pod .

Recently: “The Story Behind Creating DNS | Paul Mockapetris” on The Developing Dev (October 2026); “The Story Behind Creating DNS | Paul Mockapetris” on The Peterman Post (October 2026); “The Story Behind Creating DNS | Paul Mockapetris” on The Peterman Pod (October 2026); “Connecting the Dot-Com” on Command Line Heroes (March 2021).

What They Said

“The IETF takes credit for DNS. Okay. Now, one of the problems with that is that the DNS spec came out in 1983, and the first meeting of the IETF was in 1986. So, how exactly do you explain it?” — Paul Mockapetris, The Developing Dev

Asked about the culture behind RFCs, the internet's engineering documents, Mockapetris recalls that early on he simply wrote them and his boss handed out the numbers. Process and politics came later, with the standards body that now claims his invention.

The Developing Dev · 2026-10-19 Permalink → Listen →
The Developing Dev
Paul Mockapetris

…of some supposed stories about.nu and so forth, but this kind of happened. Okay. So do you know why Anguilla is very lucky?ai.ai, right? You know, Columbia.co. Can't get a.com. Well, you can get a.co. It's close. So, you know, this is another one of these ownership of the namespace and so forth.

Ryan Peterman

When I was reading about, I guess, some of the history of this work, there's all these RFCs. And my high-level understanding is that's a name for an engineering proposal. But I'm curious to know what's the culture behind an RFC.

Paul Mockapetris

Well, that's evolved over time. In the good old days, people would, you know, I would write this RFC, for example. There's a two beginning RFCs for the DNS. So I wrote them. And my boss happened to be the guy that hands out the RFC numbers. So he would give me a number and then he would publish it. And that just meant putting it on a server somewhere and people will come along and pluck these RFCs down. In time, though, people started having meetings and organizing the IETF. And so now we have a bunch of processes and we have different kinds of RFCs. Some are just informational. You can write an article and this is what I think. And if it's like reasonably cogent, you know, you can probably get an RFC number for it. And, you know. But then there's standards track stuff that are going to be internet, they're going to be standards. And they're, you know, politics and paperwork. You know, there's a whole lot of process. You know, the IET, the IETF takes credit for DNS. Okay. Now…

Ryan Peterman

Today, computers are ubiquitous and it's being talked about on social media all the time. But back then, I think it was a lot more niche. So, how did you get into computing?

Paul Mockapetris

MIT was offering some summer classes for high school students, and I just took one and I was kind of fascinated. But I was a physics major. I was, I was, you know, physics won World War II, and it was just cool and, you know, blah, blah, blah, right? So I got to MIT. I was a physics major. You…

Ryan Peterman

When you're working on DNS and you're seeing the internet growing, did you ever think it would grow as big as it is today? Or I'm kind of curious to view it from the lens of like, right now, if you look at the headlines, it's AI is kind of exploding and it's, you know, this future thing. And at the…

Speaker names from our own diarization · position estimated from where the line sits in the episode
“The DNS may be a privacy risk, but your privacy gets violated in so much more effective ways by all of this web stuff. … Most people don't realize that when an ad gets populated on their web page, 150 or more organizations have been asked, do you want to serve this ad to this person? They don't identify the person, but they can identify up to 144 characteristics of the person. So I appreciate the people who have done some stuff about DNS privacy, but your privacy is long gone by the time you worry about this.” — Paul Mockapetris, The Developing Dev

Mockapetris, who designed the Domain Name System, was asked who pays for the internet's root servers. He notes that DNS is becoming more centralized in a few large providers, then argues that DNS privacy worries miss the much bigger leak in online advertising.

The Developing Dev · 2026-10-19 Permalink → Listen →
The Developing Dev
Paul Mockapetris

You know, you at a 286 laptop could have mined a few billion dollars worth of Bitcoin without much trouble, right?

Ryan Peterman

…lines of code. Check them out at workOS.com to learn more and get started. And I appreciate them for sponsoring my show. You mentioned those root servers that we go to initially. What's the economic and who's paying for those servers? What's the economic incentive for those 13 clouds that exist?

Paul Mockapetris

…in the internet. Now, it's really, in a way, kind of silly because given the way that ad networks and big websites operate, the DNS may be a privacy risk, but your privacy gets violated in so much more effective ways by all of this web stuff. You know, it's like it doesn't make it to the metal round of privacy invasion. I mean, you know, you take a look at the way ad networks work. You know, most people don't realize that when an ad gets populated on their web page, 150 or more organizations have been asked, do you want to serve this ad to this person? They don't identify the person, but they can identify up to 144 characteristics of the person. So I appreciate the people who have done some stuff about DNS privacy, but your privacy is long gone by the time you worry about this.

Ryan Peterman

I mean, if you're running a big cloud service to do DNS at a hyperscaler like Amazon or something like that, that's going to cost a good amount of money. So I would think there's something more than prestige as an incentive.

Paul Mockapetris

Well, sure. I mean, I can suggest a couple of things, one of which is that Microsoft, for example, knows how the performance of LinkedIn affects how much money they make. Basically, the faster it works, the more money they make. So they want to give you a good response time. All right. So there are…

Ryan Peterman

When I was reading about, I guess, some of the history of this work, there's all these RFCs. And my high-level understanding is that's a name for an engineering proposal. But I'm curious to know what's the culture behind an RFC.

Speaker names from our own diarization · position estimated from where the line sits in the episode

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