Port 9201WAP Connectionless Session Service

Legacy WAP clients use this port for connectionless WSP sessions carried by WTP, typically over UDP.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

also known as wap-wsp-wtp

Technical Details

what runs on :9201

This is the WAP connectionless session service: Wireless Session Protocol (WSP) operating with Wireless Transaction Protocol (WTP). In typical deployments, WTP transactions are carried over UDP (via WDP), rather than using a TCP stream handshake; the IANA assignment lists both TCP and UDP. Port 9200 is associated with WAP's connection-oriented session service, while 9202 and 9203 are the corresponding secure service ports.

Security Information

exposure of :9201

risk score

1/ 10safe

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

mobile averages 2.1 across 107 ports — this one sits 1.1 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

WAP is a legacy protocol stack and this service is not expected on most modern networks. The connectionless service on 9201 is not encrypted by default; secure WAP traffic used separate secure service ports. Unless you operate a legacy WAP gateway, block unsolicited internet access and investigate unexpected listeners.

Record

iana registry entry

port: :9201
service: WAP Connectionless Session Service
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Mobile
usage: Port 9201 is assigned to WAP's connectionless session service, used by legacy mobile clients communicating with a WAP gateway. It is now uncommon; an open port may indicate an old WAP gateway or a non-WAP service using the same port.
lookups: 0rank 993
added: 2026-10-15
updated: 2026-10-15
references: IANA service name registry — port 9201

Something wrong?

This record is maintained by the engineers who use port 9201. 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 2026-10-15.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

Related Ports

all 107 in mobile →

the 8 most looked-up other ports in mobile — 107 ports carry that label.

port	service	proto	category	risk	views
:8882	Atlasz Secure App Server	TCP	Web Services	caution	66.9k
:2082	Infowave Mobility	TCP	Network Services	caution	17.7k
:3386	GTP (GPRS Tunneling Protocol)	TCPUDP	Network Services	caution	16.7k
:7401	RTPS DDS Traffic	TCPUDP	Network Services	safe	14.7k
:2948	WAP Push MMS	TCPUDP	Network Services	safe	11.7k
:5222	XMPP Client Connection	TCP	Network Services	caution	11.7k
:3006	Miralix SMS Connector	TCP	Mobile	caution	11.3k
:2949	WAP Pushsecure MMS	TCPUDP	Cloud	safe	10.4k

risk mix of the 8 listed

safe38%
caution63%

0 of 8 encrypted

Port :9201WAP Connectionless Session Service

Technical Details

Security Information

Related Ports

Port 9201WAP Connectionless Session Service