Port 2562: Delibo — Registered, Undocumented

What Port 2562 Is

Port 2562 sits in the registered port range (1024–49151). These ports are assigned by IANA to specific services, applications, and vendors that filed registration requests. Unlike the well-known ports (0–1023), registered ports don't require root or administrator privileges to open, and the protocols that use them are not always standardized or publicly documented.

IANA's registry lists port 2562 as assigned to Delibo, registered by NovaWiz LTD, on both TCP and UDP.¹

What Delibo Is

Delibo is a smart locker and package delivery service with mobile apps on iOS and Android. Think contactless parcel pickup and drop-off infrastructure. The kind of service that needs a persistent connection between lockers and a backend — which is presumably what this port is for.

But "presumably" is doing a lot of work in that sentence. NovaWiz never published an RFC. There's no technical specification explaining the protocol, the message format, or what flows over this port. The IANA registration is a name on a list, nothing more.

If you see port 2562 active on a machine that has nothing to do with smart lockers, the registration doesn't explain it.

The Registered-But-Undocumented Problem

The IANA registry exists to prevent port collisions — two applications claiming the same number. But registration doesn't require publishing documentation, and many vendors register a port to "own" a number without ever describing the protocol.

This creates a large gray zone: ports that are technically assigned but practically unknown. Port 2562 is one of them. The name is registered. The protocol is opaque.

How to Check What's Actually Using It

If port 2562 shows up on your system:

On Linux/macOS:

# Show what process is listening on port 2562
sudo ss -tlnp | grep 2562

# Or with lsof
sudo lsof -i :2562

On Windows:

netstat -ano | findstr :2562

Then take the process ID from the output and look it up:

# macOS/Linux
ps aux | grep <PID>

# Windows
tasklist | findstr <PID>

If nothing is listening, the port is idle. If something unexpected is listening, that's worth investigating — unrecognized ports with unknown processes are a legitimate security signal.