# WHATPORT(416)

## NAME

port 416 — SilverPlatter — Registered to SilverPlatter, a 1990s library database vendor — effectively never seen in the wild.

Protocol: TCP  
IANA: silverplatter

## DESCRIPTION

IANA assigned 416 to "silverplatter", registered by an engineer at SilverPlatter Information, a company that sold bibliographic and reference databases to libraries first on CD-ROM and then over a client/server product. The company was absorbed into Ovid, and the protocol has no public specification. Nothing about the port is documented beyond the registration itself. If 416 is open today, identify the process locally rather than trusting the registered name.

## EXPOSURE

**Expose with care.** A 1990s client/server database protocol with no published spec and no maintainer — assume no transport security and keep it internal.

## CHECK

```sh
nc -vz -w 3 TARGET 416
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 416](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=416) (iana.org)

---

HTML: <https://whatport.net/416/> · JSON: <https://whatport.net/416.json> · full dataset: <https://whatport.net/ports.json>