Port 6103RETS (Real Estate Transaction Standard)

RETS is a legacy HTTP protocol for exchanging real-estate listing and related data, usually through a web-server endpoint.

inWeb Services

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

Technical Details

what runs on :6103

RETS is an application protocol carried over HTTP: clients typically establish a session, log in, retrieve metadata, then issue searches or request objects such as listing photos. Responses can include XML metadata and RETS Compact-format records. In normal use, HTTP runs over TCP; a UDP registration does not make UDP a typical RETS transport. Although IANA assigns the name RETS to port 6103, production RETS services are generally exposed as web endpoints on conventional HTTP(S) ports, and 6103 is not a commonly observed listening port.

Security Information

exposure of :6103

risk score

2/ 10safe

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

web services averages 3.1 across 205 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

A reachable RETS endpoint may expose MLS listing and associated data and should require authentication and appropriate access controls. RETS itself does not provide encryption: use HTTPS or another protected transport, since unencrypted HTTP can expose credentials and returned data. Do not assume an open 6103 port is RETS solely from the IANA assignment.

Record

iana registry entry

port: :6103
service: RETS (Real Estate Transaction Standard)
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Web Services
usage: RETS is used by real-estate multiple listing services (MLSs) and their vendors to let authorized clients retrieve listing data and related media. The IANA assignment is TCP/UDP 6103, but RETS deployments are typically HTTP or HTTPS endpoints rather than services commonly found listening on this dedicated port.
lookups: 0rank 993
added: 2026-10-09
updated: 2026-10-09
references: IANA service name registry — port 6103

Something wrong?

This record is maintained by the engineers who use port 6103. 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 2026-10-09.

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edit this record →back to the registry

Related Ports

all 205 in web services →

the 8 most looked-up other ports in web services — 205 ports carry that label.

port	service	proto	category	risk	views
:8888	Sun Answerbook & Alt HTTP	TCP	Web Services	caution	123.9k
:8000	Intel Remote Desktop / Alternate HTTP Port	TCP	Web Services	safe	84.3k
:8888	NewsEDGE	TCPUDP	Web Services	caution	83.3k
:8888	HTTP Alternative Port	TCP	Web Services	caution	76.5k
:8888	GNUmp3d Streaming HTTP	TCP	Web Services	caution	76.3k
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:8881	Atlasz Secure Server	TCP	Web Services	caution	67.6k
:80	HTTP	TCPUDP	Web Services	caution	67.3k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :6103RETS (Real Estate Transaction Standard)

Technical Details

Security Information

Related Ports

Port 6103RETS (Real Estate Transaction Standard)