Port 10552 — An Unassigned Port in the User Range

What Is Port 10552?

Port 10552 is unassigned. It has no official service name in the IANA Service Name and Transport Protocol Port Number Registry. It sits in the User Ports range (1024-49151)—the middle band of the port spectrum where applications can stake a claim through IANA or operate unofficially.

Port Ranges Explained

The Internet divides 65,535 possible ports into three territories:

• System Ports (0-1023) — Reserved for the operating system and well-known services. SSH on 22, SMTP on 25, HTTPS on 443. These are the famous doors everyone knows.
• User Ports (1024-49151) — Available for applications. Services register here through IANA on a first-come, first-served basis. Thousands are assigned. Thousands more sit empty.
• Dynamic/Private Ports (49152-65535) — Ephemeral, temporary. The operating system hands these out to applications that don't care what number they get. Most client connections use these.

Port 10552 occupies registered territory but has no resident.

No Known Common Use

Unlike port 2049 (NFS), 5432 (PostgreSQL), or 8080 (HTTP proxies), port 10552 doesn't have a commonly observed unofficial use pattern. It's not a Trojan favorite. It's not a standard default for any major software.

If you see port 10552 listening on a system, it belongs to something local—a custom application, a developer's test service, infrastructure specific to that organization. Nothing universal claims it.

How to Check What's Listening

If you suspect something is using port 10552 on your system:

On macOS or Linux:

lsof -i :10552
netstat -an | grep 10552
ss -tuln | grep 10552

On Windows:

netstat -ano | findstr :10552
Get-NetTCPConnection -LocalPort 10552

With nmap (from another machine):

nmap -p 10552 [target-ip]

These commands show you what process is listening, its PID, and what user owns it. If nothing appears, the port is quiet. No service is home.

Why Unassigned Ports Matter

An unassigned port represents something important about Internet design: flexibility at the edges.

Registering a port with IANA costs nothing but requires the work of documenting your service, writing the request, waiting for approval. Most custom applications don't bother. They pick a number they hope won't collide, document it internally, move on. Port 10552 could be the home of someone's specialized tool, used by thousands internally but never registered, never announced.

This is how the Internet scales—not by planning everything at the center, but by allowing freedom in the middle bands. You can use port 10552 tomorrow if you need it. No permission required. Just make sure no one else in your network already claimed it.

The empty ports are the Internet remembering that growth happens in the gaps.

How to Check Current Status

To verify port 10552's current status in the official IANA registry:

1. Visit the IANA Service Name and Transport Protocol Port Number Registry
2. Search for "10552" in the official registry
3. Check both TCP and UDP columns to confirm no assignment

Related Information

• If you need to register a port for your service, IANA accepts applications at https://www.iana.org/form/ports-services
• See RFC 6335 for the formal procedures governing port registration