Port 10604 — Dollar Universe (Unregistered)

What This Port Is

Port 10604 has no official assignment in the IANA Service Name and Transport Protocol Port Number Registry. It is unassigned.

But "unassigned" is misleading. Port 10604 is actively used by Dollar Universe, a Broadcom product for job scheduling and workload automation. In a typical Dollar Universe installation, ports 10600-10618 are reserved as a block, with 10604 handling specific components of the system's internal communication.

Port Range Context

10604 falls within the registered port range (1024-49151). These ports are available for registered applications and protocols that don't require the special privileges of well-known ports (0-1023). Unlike well-known ports, registered ports don't imply system-level access or universal recognition.

This creates a gray zone: thousands of applications claim registered port numbers without formal IANA registration. They work. They persist. They become de facto standards within their ecosystems—but they never appear in official registries.

Known Use: Dollar Universe

Dollar Universe is enterprise software for:

• Job scheduling and automation
• Workload orchestration across distributed systems
• Monitoring and managing batch processes at scale

It's the kind of tool that runs silently in corporate data centers, processing millions of scheduled tasks daily, rarely mentioned outside IT operations teams. If port 10604 is listening on one of your systems, Dollar Universe is likely running there.¹

The full Dollar Universe TCP port block includes 10600, 10604, 10605, 10611, 10615, and 10618, each handling different functions within the system.

How to Check What's Listening

On Linux/macOS:

lsof -i :10604
sudo netstat -tulpn | grep 10604
ss -tulpn | grep 10604

On Windows:

netstat -ano | findstr :10604
Get-NetTCPConnection -LocalPort 10604

Using nmap (remote check):

nmap -p 10604 <target-ip>

These commands will tell you if anything is listening on 10604, and on Unix-like systems, which process owns that port.

Why Unassigned Ports Matter

The IANA registry has roughly 5,000 entries across 65,535 possible ports. The rest exist in a borderless frontier where applications claim numbers by convention, private agreement, or simple first-come-first-served adoption.

This system works because:

1. Most traffic is local — Port 10604 on your system is your port. Port 10604 on a different network is someone else's.
2. Collisions are rare — Vendors are generally aware of what others use; conflicts are unusual.
3. Private networks don't collide — Internal applications can use any port without Internet-wide coordination.

But it also means the Internet's port system is less a registry than a sprawling handshake agreement. Port 10604 is a reminder that formal standards describe only a fraction of what actually runs.

See Also

• Nearby ports: 10600, 10605, 10611 — Other Dollar Universe components
• Port 22 (SSH): The actual standard for remote access
• Port 443 (HTTPS): Where the public Internet lives
• High-number ports (49152-65535): Dynamic/ephemeral ports for temporary connections