Port 3891Oracle RTC-PM
Oracle RTC-PM is assigned TCP and UDP port 3891, but its protocol and typical deployments are not publicly established.
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 1/10
- lookups
- 0
2 transports registered
payload readable on path
registered with iana
safe
rank 993 of 4,971 · top 20%
also known as rtc-pm-port
Technical Details
what runs on :3891Oracle RTC-PM is registered on port :3891 over tcp and udp to PV Shivkumar, assigned October 2003. 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 :3891
# linux
sudo ss -tulpn 'sport = :3891'
# macos / bsd
sudo lsof -nP -i :3891
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3891nmap -sV -p T:3891 <host>
sudo nmap -sU -sV -p U:3891 <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 detailsSecurity Information
exposure of :3891risk 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 · udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
no security notes recorded for :3891 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :3891, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :3899 | Remote Administrator | TCP | Remote Access | caution | 20.6k |
| :3872 | Oracle Management Agent | TCP | Databases | caution | 14.3k |
| :3868 | Diameter Protocol | TCPSCTP | Security | caution | 7.7k |
| :3945 | EMCADS | TCPUDP | Security | caution | 7.6k |
| :3900 | IBM UniData UDT OS | TCP | Databases | caution | 6.4k |
| :3880 | IGRS | TCPUDP | Network Services | caution | 5.2k |
| :3910 | Printer Request Port | TCPUDP | System | safe | 0 |
| :3947 | Connect and Control Protocol (CCP) | TCPUDP | IoT | safe | 0 |
risk mix of the 8 listed
- safe25%
- caution75%
0 of 8 encrypted