Before the internet was the internet for ordinary people, FidoNet was the network that quietly connected the world’s bulletin board systems. From the mid-1980s through the mid-1990s, FidoNet carried mail and discussion traffic between tens of thousands of BBSes worldwide. It was a real, working, distributed messaging network, built almost entirely by hobbyists, running on cheap hardware over voice telephone lines. Most current internet users have never heard of it.

The basic concept was elegant. A BBS — a single computer running BBS software with one or more modems attached, accepting calls from individual users — would be assigned a node number in the FidoNet hierarchy. The hierarchy was geographic: nodes belonged to nets, nets belonged to regions, regions belonged to zones. Every BBS in FidoNet had a unique address like 3:712/1108, where 3 was the zone, 712 the net, 1108 the node.

The actual mail transport happened during scheduled “Zone Mail Hours” — a specific window each night, in the BBS operator’s local time, when the BBS would accept mail calls from other BBSes. Hubs and host BBSes called member BBSes, exchanged the mail packets that had accumulated since the last poll, and continued the process up the hierarchy. International mail moved through gateway BBSes that maintained relationships across zones.

Echomail — public discussion forums — flowed through the same infrastructure. A user posting to a topical conference on their local BBS would see the message replicated across thousands of BBSes worldwide over the following days as the mail network propagated it. By 1990, the major echomail conferences carried meaningful daily traffic on topics ranging from ham radio to philosophy to specific software projects.

The technical layer was the work of legendary BBS authors and the FidoNet community. Tom Jennings created the original Fido BBS software and the FidoNet protocol. The mailers, the message editors, the tossers, the squishers — every link in the FidoNet chain was independently-developed software that interoperated with the rest. The standards, codified in FidoNet Technical Standard documents, allowed dozens of different BBS packages to participate in a single coherent network.

The economics were unusual. FidoNet operated almost entirely on volunteer effort and personal long-distance phone bills. Hub operators carried significant costs to keep their part of the network functioning. Many of them ran their BBSes from home, paying for the phone calls out of pocket. The cultural norm was reciprocity: if you took mail in, you handed it onward to the BBSes that called you. The network functioned because most operators honoured the obligations the protocol implied.

The decline started in 1993-94 as commercial internet access became affordable for ordinary users. The internet’s email, Usenet, and IRC offered the same functions FidoNet provided, with better real-time performance and lower marginal cost. BBS operators migrated. Users migrated. The FidoNet traffic gradually thinned. By 2000, FidoNet was operating but reduced. By 2010, it was an actively-maintained hobbyist project rather than a daily-use network.

FidoNet still exists in 2026. The network is small, used mostly by enthusiasts who appreciate the protocol or maintain emotional connection to the era. The technical infrastructure has adapted somewhat to modern realities — mail can flow over IP rather than dial-up — but the underlying protocol architecture from the 1980s is still recognisable. There’s something endearing about a working communication network that survived the rise of the commercial internet through pure hobbyist enthusiasm.

What made FidoNet matter historically: it proved that distributed, hobbyist-operated, non-commercial communication networks could work at scale. The lessons FidoNet taught the people who built them — protocol design, federation, content moderation across loosely-coupled systems, reputation, and trust — fed directly into the development of internet infrastructure. Many of the engineers who shaped the early commercial internet had cut their teeth on FidoNet operations.

The cultural artefacts of the FidoNet era are also worth preserving. The echomail archives, where they survive, document conversations and communities that were genuinely meaningful to the participants. Open-source preservation efforts have rescued portions of this archive, but a great deal has been lost. The BBS systems shut down without archiving, the disks degraded, and the messages are gone.

For people interested in the genuine pre-commercial-internet computing culture, FidoNet is one of the foundational stories. It’s not the only one — Usenet, the early internet, the various university research networks, the European X.25 nets — but it’s the one that most directly shaped the experience of ordinary users in the BBS era. The network that ran on phone calls late at night between volunteer BBS operators, carrying messages across the world for free, was a quietly remarkable thing.