Port 36412S1-Control Plane (S1AP)

SCTP port 36412 carries S1AP control signaling between LTE base stations and the mobile core.

transport: sctp
in transit: cleartext
assignment: official
risk: 7/10
lookups: 0

also known as S1-MME

Technical Details

what runs on :36412

S1AP (S1 Application Protocol) runs over SCTP on port 36412, with the eNodeB typically initiating an SCTP association to the MME. S1AP messages use ASN.1 aligned PER encoding; the S1 Setup procedure establishes the control-plane relationship, and UE-associated signaling uses SCTP streams. This is the S1-MME control interface, distinct from S1-U user traffic, which commonly uses GTP-U over UDP port 2152. S1AP does not provide encryption itself; protection depends on the operator's transport network and any separately configured security such as IPsec.

Security Information

exposure of :36412

risk score

7/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

network services averages 2.6 across 1,994 ports — this one sits 4.4 above.

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

sctp

every listening transport is another surface to filter at the edge

security overview

This is a sensitive mobile-network control interface and should not be exposed to the public internet; it belongs on a tightly controlled operator network. An attacker with network access may probe the SCTP endpoint or attempt signaling abuse and denial of service, but S1AP does not itself grant access to the mobile core. Use network filtering and appropriate transport protection; no specific port-wide vulnerability is implied by the assignment.

Record

iana registry entry

port: :36412
service: S1-Control Plane (S1AP)
transport: SCTP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: Network Services Mobile
usage: LTE eNodeBs use this port to exchange S1 control-plane signaling with the Mobility Management Entity (MME). Engineers encounter it on operator networks and lab LTE deployments, not as a general-purpose internet service.
lookups: 0rank 993
added: 2026-10-20
updated: 2026-10-20
references: IANA service name registry — port 36412

Something wrong?

This record is maintained by the engineers who use port 36412. 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 2026-10-20.

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 1,994 in network services →

the 8 most looked-up other ports in network services — 1,994 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:6543	Jetnet	UDP	Network Services	caution	65.3k
:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3233	WhiskerControl Protocol	TCPUDP	Network Services	caution	61.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :36412S1-Control Plane (S1AP)

Technical Details

Security Information

Related Ports

Port 36412S1-Control Plane (S1AP)