Port 7701SCF nFAPI (Network FAPI)

SCTP port 7701 carries SCF nFAPI control messages between a small-cell PHY and its MAC.

transport: sctp
in transit: cleartext
assignment: official
risk: 5/10
lookups: 0

Technical Details

what runs on :7701

The IANA assignment is for SCF nFAPI's MAC/PHY split. SCTP/7701 carries nFAPI P5 control-plane messages between the virtual and physical network functions, including configuration and lifecycle/control exchanges; it is a binary message protocol over an SCTP association, not a line-oriented TCP service. The nFAPI P7 real-time interface is commonly carried separately over UDP (often port 7702), so seeing UDP/7702 may accompany this SCTP listener.

Security Information

exposure of :7701

risk score

5/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

network services averages 2.6 across 1,791 ports — this one sits 2.4 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 radio-access-network control interface and should be reachable only by the intended peer on a trusted, segmented RAN network—not exposed to the public internet. SCTP itself does not encrypt traffic, and nFAPI deployments should not be assumed to provide transport encryption or peer authentication; use network controls and, where needed, a protected tunnel. An exposed endpoint could invite probing or unauthorized control attempts, although the specialized protocol and lack of observed open instances make routine internet exposure uncommon.

Record

iana registry entry

port: :7701
service: SCF nFAPI (Network FAPI)
transport: SCTP
encryption: cleartext
assignment: iana registered
risk: 5/10caution
category: Network Services Mobile
usage: nFAPI is the Small Cell Forum interface for splitting a small-cell radio access network between a physical network function (PHY) and a virtual network function (typically MAC). Engineers encounter SCTP/7701 for its P5 control interface in deployments that use this split; it is specialized cellular infrastructure traffic, not a general-purpose service.
lookups: 0rank 993
added: 2026-10-13
updated: 2026-10-13
references: IANA service name registry — port 7701

Something wrong?

This record is maintained by the engineers who use port 7701. 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 2026-10-13.

01edit any field on a page of its own
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edit this record →back to the registry

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all 1,791 in network services →

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :7701SCF nFAPI (Network FAPI)

Technical Details

Security Information

Related Ports

Port 7701SCF nFAPI (Network FAPI)