Port 2422: CRMSBITS — The Port That Forgot Its Purpose

What This Port Is

Port 2422 sits in the registered port range (1024–49151). Ports in this range can be formally claimed through IANA, and port 2422 has been — it's assigned to a service named CRMSBITS, registered to a contact named Rod Ward, for both TCP and UDP.

That's essentially everything the official record says.

There is no RFC. No surviving documentation. No public specification for what CRMSBITS was, what it did, or who used it. The name suggests something related to CRM (customer relationship management) software, but that's inference from an acronym, not evidence. Whatever CRMSBITS was, it registered a port and then went quiet.¹

A Ghost and a Board Game

Port 2422 has one other notable entry in the informal record: Scrabble Complete, an Infogrames game from 2002, was observed using this port for multiplayer networking.² It's not officially assigned to Scrabble Complete — it's just what happened to be running there in that era. Software often picked registered-but-dormant ports precisely because they were unlikely to conflict with anything actively running.

Both the forgotten CRM service and the 2002 board game now belong to the same category: the port's past tenants, neither of them present anymore.

Why This Happens

The registered port range contains thousands of assignments like this. Someone filed a registration, the software shipped (or didn't), the company moved on, and the assignment remained. IANA doesn't revoke registrations for inactivity — once a port is assigned, it stays assigned.³

This creates a large number of ports that are technically occupied but practically empty. They're not safe to assume as free, but they're also not serving anything recognizable. They're the Internet's equivalent of a reserved parking spot whose owner stopped showing up.

How to Check What's Using It

If port 2422 is active on your system, a few commands will tell you what's there:

Linux / macOS:

# Show what process is listening on port 2422
ss -tlnp | grep 2422

# Or with lsof
lsof -i :2422

Windows:

netstat -ano | findstr :2422

The process ID in the output can be matched against Task Manager or tasklist to identify the application. Unless you're running vintage Scrabble, whatever you find will be something running in your environment specifically.