Somewhere on a network most people forgot existed, a weekly text file was compiled and distributed on the fifth of May this year. It was called NODELIST.125. The number after the dot is the day-of-year, the Julian day count Tom Jennings reached for in 1984 because he needed a way to version a plain-text roster that would update every week without breaking anything that parsed the name. The roster had two entries on it then. Jennings and John Madrill, Fido #1 and Fido #2. The early copies were typed on paper.

The format that built around those two entries is still the format in use. FTS-0005 codified it: a fixed-length header, a list of zone-net-node lines, simple Cnn/Ann/Dnn nodediff commands so a weekly subscriber only had to download the changes since last week. Compressed in ARC at first and later ZIP, with ARJ, LZH, and RAR also seen in the wild as archive fashions shifted. The contents moved through a dozen generations of the modems that were supposed to read them. The nodelist team still collates submissions from each zone and pushes out the diff.

NodeHist, a search index hosted on a Ukrainian server, holds 6,943 weekly nodelists at the time of writing. The earliest is 3 October 1986. The most recent is 5 May 2026. That last figure is what stops me when I think about it. Most of the protocols I remember from the 1990s died with the things they connected. The NODELIST kept going.

Part of what kept it going is that nothing else does what it does. A FidoNet node is identified by a four-part address (zone, net, node, point) that only resolves because the nodelist tells every other node where to send mail and how to reach it. Strip the nodelist away and the addressing collapses into noise. The list is the network's namespace. There is no DNS, no fallback. You are in the file or you do not exist.

The other reason it kept going is that the people who run it never stopped. They are not running it as nostalgia. They are running it because they still use the thing. Mail is moving through FidoNet right now, slowly, mostly between operators who have been there since the Reagan administration but also occasionally between someone who found a sysop's number in a back issue of 2600 and decided to try. The mail moves because the nodelist still tells the software where the recipient lives. This is the same logic that made the modem handshake sound outlast the modems: the protocol survives by being the thing that actually does the work.

It does feel like a haunting, in the strict sense Fisher meant. The format is a future that was supposed to scale and didn't. By the time FidoNet's traffic peaked in the mid-1990s, the architecture it pioneered (store-and-forward, decentralised governance, a trust-on-first-contact addressing scheme) was already being absorbed into the early commercial internet without attribution. Tom Jennings had spent a decade building a community on top of a plain-text directory and a 1200-baud modem. The internet took his ideas and forgot his protocols. The protocols, very politely, refused to leave.

I think of the nodelist as the last published artefact of a network that has stopped expecting to grow. The day-of-year number will tick up to 132 next week, and the format Tom Jennings typed by hand will get its 6,944th weekly issue. Counting forward.

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