Port 36422X2 Application Protocol (X2AP)

X2AP carries LTE control-plane signalling between eNodeBs over SCTP, including coordination for handovers.

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

also known as x2-control, X2-C

Technical Details

what runs on :36422

X2AP is specified in 3GPP TS 36.423 and normally uses SCTP on port 36422. SCTP establishes an association using its INIT/INIT-ACK and cookie handshake; X2AP messages, including X2 Setup and handover signalling, are encoded using ASN.1 aligned PER. The protocol has no built-in encryption, and deployments rely on the operator's network protections or separately configured IPsec. X2 user-plane traffic is separate and commonly uses GTP-U over UDP port 2152.

Security Information

exposure of :36422

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

X2AP is a cellular control-plane service and should not be exposed to the public internet; access should be restricted to trusted operator network elements, with transport protections such as IPsec where required. An exposed endpoint can invite probing, denial-of-service attempts, and attacks against vulnerable X2AP implementations; the protocol itself does not encrypt or authenticate the peer.

Record

iana registry entry

port: :36422
service: X2 Application Protocol (X2AP)
transport: SCTP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: Network Services Mobile
usage: This port is used for the LTE X2 control-plane interface between eNodeBs (base stations). Operators use it for functions such as handover coordination; it is normally found on cellular operator networks, not on public-facing hosts.
lookups: 0rank 993
added: 2026-10-20
updated: 2026-10-20
references: IANA service name registry — port 36422

Something wrong?

This record is maintained by the engineers who use port 36422. 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.

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :36422X2 Application Protocol (X2AP)

Technical Details

Security Information

Related Ports

Port 36422X2 Application Protocol (X2AP)