Port 1458 is officially registered to nrcabq-lm, a license manager service from Nichols Research Corporation.1 If you've never heard of either the service or the company, you're not alone. This is a ghost port—officially assigned, permanently recorded in the IANA registry, but pointing to software that hasn't existed for decades.
What Is nrcabq-lm?
The service name "nrcabq-lm" stands for Nichols Research Corporation Albuquerque License Manager. Nichols Research Corporation was a defense contractor and IT services provider that worked primarily with the Department of Defense, supplying engineering services, network security, and system integration.2
The "-lm" suffix indicates this was a license manager—software that controlled access to proprietary applications, verifying that users had valid licenses before allowing them to run the software. In the 1990s, many enterprise software companies ran their own license management servers on dedicated ports.
The Registered Port Range
Port 1458 falls in the registered port range (1024-49151). These ports are assigned by IANA to specific services and applications, though the assignment process is less strict than for well-known ports (0-1023).
Companies and organizations can apply to IANA to register a port for their service. Once registered, the port number is officially associated with that service in the global registry—even if the service later disappears.
What Happened to Nichols Research Corporation?
Nichols Research Corporation was a substantial company—worth approximately $450 million at its peak—providing IT services and defense contracting.2 The company was eventually acquired by Computer Sciences Corporation (CSC), absorbed into a larger entity, and the Nichols brand disappeared.
With it went nrcabq-lm. The software is gone. The servers are decommissioned. The engineers who built it have moved on to other companies. But port 1458 remains in the registry, a permanent marker for something that no longer exists.
Ghost Ports and the Archaeological Internet
Port 1458 is not unique. The IANA port registry is full of these ghost ports—official assignments to services that are obsolete, companies that are defunct, or protocols that were never widely adopted.
The registry is an archaeological record. Every port tells a story: who needed what, when, and why. Some of those stories ended decades ago, but the port numbers remain, unchanging.
This is actually a feature, not a bug. Port numbers are never reassigned. Once 1458 was assigned to nrcabq-lm, it stays assigned to nrcabq-lm forever—even if nobody is using it. This prevents conflicts. If IANA reassigned 1458 to a new service, old systems running legacy Nichols Research software might break. Better to let the port sit empty.
What Might Be Using Port 1458 Today?
Officially? Nothing. The service it was registered for is gone.
Unofficially? Any application can bind to any port. If you find port 1458 open on your network, it's not the Nichols Research license manager—it's something else entirely. Malware, custom internal software, or misconfigured services sometimes use registered ports that are effectively abandoned.
How to Check What's Listening on Port 1458
On Linux or macOS:
On Windows:
If you see something listening on port 1458, investigate it. It's not the service that port was registered for—that service is dead. It's either legitimate software from your organization or something that shouldn't be there.
Why Unassigned and Ghost Ports Matter
The port system works because it's organized. Well-known ports (0-1023) are strictly controlled. Registered ports (1024-49151) are officially assigned but less policed. Dynamic ports (49152-65535) are free-for-all temporary assignments.
Ghost ports like 1458 illustrate the tension in this system. The registry is permanent, but technology is ephemeral. Companies die. Software gets discontinued. Engineers retire. The Internet outlives them all.
The port stays in the registry not because anyone is using it, but because consistency matters more than efficiency. The Internet can afford to have thousands of unused port numbers. It cannot afford the chaos of reassigning them.
The Weight of the Registry
Every registered port represents a moment when someone thought, "This matters enough to make it official." Someone at Nichols Research Corporation filled out the IANA application, explained what nrcabq-lm did, and requested port 1458. IANA approved it. The registry was updated. The port became part of the Internet's permanent record.
That person probably never imagined they were creating a monument. But that's what it is. Port 1458 is a tombstone for a service nobody remembers, managed by a company that no longer exists, serving clients who have long since moved on.
And yet the port remains. That's the Internet. It remembers everything. Even the things we've forgotten.
Frequently Asked Questions About Port 1458
Was deze pagina nuttig?