Port 6900R*TIME Viewer Data Interface

Port 6900 is assigned to Curtiss-Wright’s R*TIME Viewer Data Interface; public protocol details are not established.

transport: tcp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

Technical Details

what runs on :6900

R*TIME Viewer Data Interface is registered on port :6900 over tcp to Curtiss-Wright Corporation, assigned December 2016. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.

find what's listening on :6900

this machine

# linux
sudo ss -tlpn 'sport = :6900'

# macos / bsd
sudo lsof -nP -i :6900

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :6900

another host

nmap -sV -p T:6900 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :6900

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

no security notes recorded for :6900 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :6900
service: R*TIME Viewer Data Interface
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP port 6900 to the R*TIME Viewer Data Interface, registered to Curtiss-Wright Corporation. The assignment alone does not establish what software listens on it or how the interface behaves.
lookups: 0rank 993
added: 2026-10-11
updated: 2026-10-11
references: IANA service name registry — port 6900

Something wrong?

This record is maintained by the engineers who use port 6900. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-11.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

browse categories →

ports registered around :6900, by lookups.

port	service	proto	category	risk	views
:6888	BitTorrent	TCPUDP	File Transfer	caution	13.4k
:6889	BitTorrent	TCPUDP	File Transfer	caution	11.2k
:6888	MUSE	TCPUDP	File Transfer	caution	11.2k
:6881	BitTorrent	TCPUDP	File Transfer	caution	10.9k
:6901	BitTorrent	TCPUDP	File Transfer	caution	10.2k
:6891	BitTorrent Data Transfer	TCPUDP	File Transfer	caution	9.9k
:6902	BitTorrent	TCPUDP	File Transfer	caution	9.7k
:6901	Windows Live Messenger Voice	TCPUDP	Streaming	caution	6.0k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :6900R*TIME Viewer Data Interface

Technical Details

Security Information

Related Ports

Port 6900R*TIME Viewer Data Interface