Port 3771RTP Paging Port

RTP Paging Port is assigned for paging-related Real-time Transport Protocol traffic.

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

Technical Details

what runs on :3771

RTP Paging Port is registered on port :3771 over tcp and udp to Patrick Ferriter, assigned June 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 found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :3771

this machine

# linux
sudo ss -tulpn 'sport = :3771'

# macos / bsd
sudo lsof -nP -i :3771

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3771

another host

nmap -sV -p T:3771 <host>
sudo nmap -sU -sV -p U:3771 <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 :3771

risk score

1/ 10safe

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

media averages 2.2 across 111 ports — this one sits 1.2 below.

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 :3771 yet

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

Record

iana registry entry

port: :3771
service: RTP Paging Port
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Media
usage: Port 3771 is assigned for RTP paging traffic over TCP and UDP. The assignment was registered by Patrick Ferriter in 2003; no specific product or widely documented implementation is identified.
lookups: 0rank 993
added: 2026-09-05
updated: 2026-09-05
references: IANA service name registry — port 3771

Something wrong?

This record is maintained by the engineers who use port 3771. 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 2026-09-05.

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

all 111 in media →

the 8 most looked-up other ports in media — 111 ports carry that label.

port	service	proto	category	risk	views
:8888	GNUmp3d Streaming HTTP	TCP	Web Services	caution	76.3k
:8000	Alternate HTTP / SHOUTcast	TCP	Web Services	caution	45.0k
:8880	CDDB Protocol Alternate	UDP	Network Services	caution	29.5k
:6005	Camfrog Chat	TCP	Voice and Chat	caution	25.2k
:8880	Windows Media SOAP Connector	TCP	Streaming	caution	24.3k
:8081	HTTP Alternate Port	TCP	Web Services	caution	23.3k
:5001	Slingbox	TCP	Streaming	caution	22.4k
:19302	Google Talk Voice & Video	UDP	Network Services	caution	19.3k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :3771RTP Paging Port

Technical Details

Security Information

Related Ports

Port 3771RTP Paging Port