Port 4870Citcom Tracking Service

Port 4870 is assigned to Citcom Tracking Service, with no widely documented public deployment.

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

also known as cc-tracking

Technical Details

what runs on :4870

Citcom Tracking Service is registered on port :4870 over tcp and udp to Wolfgang Weidner, assigned December 2005. 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 :4870

this machine

# linux
sudo ss -tulpn 'sport = :4870'

# macos / bsd
sudo lsof -nP -i :4870

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :4870

another host

nmap -sV -p T:4870 <host>
sudo nmap -sU -sV -p U:4870 <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 :4870

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 · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

no security notes recorded for :4870 yet

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

Record

iana registry entry

port: :4870
service: Citcom Tracking Service
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The IANA assignment identifies TCP and UDP port 4870 as the Citcom Tracking Service. It is registered to Wolfgang Weidner; no common implementation or deployment context is documented.
lookups: 0rank 993
added: 2026-10-06
updated: 2026-10-06
references: IANA service name registry — port 4870

Something wrong?

This record is maintained by the engineers who use port 4870. 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 2026-10-06.

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 :4870, by lookups.

port	service	proto	category	risk	views
:4899	Radmin Remote Administration	TCPUDP	Security	safe	28.3k
:4840	OPC UA TCP	TCPUDP	Network Services	caution	26.6k
:4843	OPC UA over TLS/SSL	TCPUDPtls	Security	caution	24.6k
:4847	Quadrion WebFresh	TCPUDP	Web Services	caution	7.2k
:4894	LysKOM	TCPUDP	Voice and Chat	caution	4.1k
:4839	varadero-2	TCPUDP	—	safe	0
:4840	OPC UA PubSub over UDP	UDP	Network Services	caution	0
:4838	Varadero-1	TCPUDP	—	safe	0

risk mix of the 8 listed

safe38%
caution63%

1 of 8 encrypted

Port :4870Citcom Tracking Service

Technical Details

Security Information

Related Ports

Port 4870Citcom Tracking Service