Port 45023GPP2 A25 FAP–FGW

SCTP signaling for the 3GPP2 A25 interface between a femtocell access point and its femtocell gateway.

transport: sctp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as A25

Technical Details

what runs on :4502

IANA assigns SCTP port 4502 to A25 (FAP-FGW), the 3GPP2 interface between a femtocell access point and its gateway. SCTP carries the interface signaling in an association; the assignment alone does not specify application-level framing, setup parameters, or security negotiation, so those details depend on the applicable 3GPP2 specifications and deployment.

Security Information

exposure of :4502

risk score

2/ 10safe

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

network services averages 2.6 across 1,548 ports — this one sits 0.6 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

sctp

every listening transport is another surface to filter at the edge

security overview

This is operator-network signaling and should normally be reachable only between authorized FAPs and their FGW, not exposed to the public internet. SCTP itself does not encrypt traffic; protect the path with network isolation or an appropriately secured tunnel, and restrict peers and filtering rules to the intended endpoints.

Record

iana registry entry

port: :4502
service: 3GPP2 A25 FAP–FGW
transport: SCTP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services Mobile
usage: This port is assigned to A25 signaling between a 3GPP2 femtocell access point (FAP) and femtocell gateway (FGW). It is relevant in operator-managed CDMA femtocell networks, not typically a general-purpose public service.
lookups: 0rank 993
added: 2026-10-05
updated: 2026-10-05
references: IANA service name registry — port 4502

Something wrong?

This record is maintained by the engineers who use port 4502. 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 2026-10-05.

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :45023GPP2 A25 FAP–FGW

Technical Details

Security Information

Related Ports

Port 45023GPP2 A25 FAP–FGW