Port 3316AICC Computer-Managed Instruction (CMI)

Registered for AICC/CMI courseware communication, which typically uses an LMS's HTTP(S) endpoint rather than a dedicated port 3316 listener.

inWeb Services

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as aicc-cmi, AICC HACP, Computer-Managed Instruction

Technical Details

what runs on :3316

Port 3316 is registered for AICC/CMI. AICC HACP exchanges course and learner data using HTTP requests and responses, commonly with courseware sending data to an LMS endpoint; deployments generally use the LMS's web service on HTTP or HTTPS ports such as 80 or 443 rather than a dedicated listener on 3316. The registration lists both TCP and UDP, but HTTP-based HACP uses TCP; the UDP listing does not establish a normal AICC/CMI UDP protocol or a particular handshake or framing on that transport.

Security Information

exposure of :3316

risk score

2/ 10safe

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

web services averages 3.2 across 184 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

AICC exchanges can contain learner identifiers, session state, and course progress. Plain HTTP does not protect those contents in transit, so use HTTPS where available; as with other LMS endpoints, restrict access and keep the LMS software current. A port-3316 listener is uncommon, and an open port alone does not confirm that it is AICC/CMI.

Record

iana registry entry

port: :3316
service: AICC Computer-Managed Instruction (CMI)
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Web Services
usage: AICC/CMI is a standard for exchanging course and learner-session data between courseware and a learning management system (LMS). AICC systems commonly use HTTP-based HACP through the LMS web server; a dedicated listener on port 3316 is not commonly encountered.
lookups: 0rank 993
added: 2026-09-28
updated: 2026-09-28
references: IANA service name registry — port 3316

Something wrong?

This record is maintained by the engineers who use port 3316. 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 2026-09-28.

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 184 in web services →

the 8 most looked-up other ports in web services — 184 ports carry that label.

port	service	proto	category	risk	views
:8888	Sun Answerbook & Alt HTTP	TCP	Web Services	caution	123.9k
:8000	Intel Remote Desktop / Alternate HTTP Port	TCP	Web Services	safe	84.3k
:8888	NewsEDGE	TCPUDP	Web Services	caution	83.3k
:8888	HTTP Alternative Port	TCP	Web Services	caution	76.5k
:8888	GNUmp3d Streaming HTTP	TCP	Web Services	caution	76.3k
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:8881	Atlasz Secure Server	TCP	Web Services	caution	67.6k
:80	HTTP	TCPUDP	Web Services	caution	67.3k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :3316AICC Computer-Managed Instruction (CMI)

Technical Details

Security Information

Related Ports

Port 3316AICC Computer-Managed Instruction (CMI)