Port 1949: ISMA Easdaq Live — A Port for a Dead Exchange

Port 1949 sits in the registered port range (1024–49151), where applications and services claim numbers by filing with IANA. Most claims in this range are in active use. Port 1949 is one of the exceptions: it is formally registered, the service it was registered for is gone, and nobody else has claimed it.

The registration: ISMA Easdaq Live — a market data streaming service for the EASDAQ stock exchange.

What EASDAQ Was

EASDAQ (European Association of Securities Dealers Automatic Quotation System) launched in Brussels in 1996 as Europe's answer to Nasdaq. The premise was straightforward: American tech companies were thriving on Nasdaq's screen-based, quote-driven model, and Europe's high-growth companies deserved the same.¹

It was the first pan-European exchange built specifically for entrepreneurial, high-growth companies — using a multiple market-maker system lifted directly from Nasdaq's playbook.²

The irony came in 2001, when Nasdaq itself purchased a majority stake in EASDAQ and rebranded it Nasdaq Europe. The dot-com bubble had already burst. Two years later, in 2003, operations shut down entirely.³

Port 1949 — registered for ISMA Easdaq Live, the protocol that streamed real-time market data from that exchange — is now a quiet artifact. The exchange is gone. The port number stays on the books.

(Port 1950 was registered at the same time for ISMA Easdaq Test, presumably the staging environment for the same service.)

What This Range Means

Registered ports (1024–49151) are claimed by applications through IANA. Unlike well-known ports (0–1023), no special privilege is required to use them — any process can open a registered port. Registration just means a service staked a claim in the public record.

When a service disappears, the registration typically stays. Ports are not reclaimed. This is how a number assigned to a Belgian stock exchange in the late 1990s still appears in IANA records in 2026.⁴

What Might Actually Use This Port Today

Officially: nothing. The EASDAQ service is dead.

Unofficially: if you see traffic on port 1949 on your network, it is almost certainly an application that chose this number informally — either because it was available, or because the developer simply picked a number. Unassigned-in-practice registered ports are frequently chosen by proprietary software, internal tools, and games that never filed with IANA.

How to Check What Is Listening

On Linux or macOS:

# Show what process is listening on port 1949
ss -tlnp | grep 1949

# Alternative using lsof
lsof -i :1949

On Windows:

netstat -ano | findstr :1949

If nothing responds, the port is dormant on your machine. If something does respond, the process name in the output will tell you what claimed it.

Why Unassigned Ports Matter

The port registry exists so that software can find each other reliably. SSH listens on 22. HTTPS listens on 443. Clients know where to knock.

But a registration without an active service is a ghost — it occupies space in the record without providing any coordination benefit. The system works anyway, because the registry's real function is to prevent conflicts, not enforce occupancy. A number no one is using can't cause a conflict.

Port 1949 is a small monument to something that tried and didn't survive. The exchange collapsed, the software went dark, and the port number kept the name.