Port 2575HL7 over MLLP

HL7 v2 healthcare messages commonly use this port over TCP with MLLP framing.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 6/10
lookups: 0

also known as hl7

Technical Details

what runs on :2575

HL7 v2 is a message format used to exchange clinical and administrative data between healthcare systems. Deployments commonly carry it over TCP using Minimal Lower Layer Protocol (MLLP): a message is framed with a start byte (VT, 0x0B) and an end sequence (FS, 0x1C followed by CR, 0x0D), with acknowledgments often sent in response. Port 2575 is a common convention, not a requirement of HL7; the IANA entry lists both TCP and UDP, though reliable TCP-based MLLP is the typical use. MLLP itself does not provide encryption.

Security Information

exposure of :2575

risk score

6/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

network services averages 2.7 across 1,316 ports — this one sits 3.3 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

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

HL7 messages can contain sensitive patient information, and ordinary MLLP traffic is not encrypted or authenticated by the framing protocol. Keep listeners on trusted healthcare networks or protect them with controls such as network segmentation, VPNs, or a properly configured TLS-protected transport; avoid exposing them directly to the internet.

Record

iana registry entry

port: :2575
service: HL7 over MLLP
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 6/10risk
category: Network Services
usage: Healthcare integration engines, EHRs, and other clinical systems commonly exchange HL7 v2 messages over TCP using MLLP on this port. The registry also lists UDP, but TCP is the usual deployment.
lookups: 0rank 993
added: 2026-09-23
updated: 2026-09-23
references: IANA service name registry — port 2575

Something wrong?

This record is maintained by the engineers who use port 2575. 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 2026-09-23.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

all 1,316 in network services →

the 8 most looked-up other ports in network services — 1,316 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:6543	Jetnet	UDP	Network Services	caution	65.3k
:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3233	WhiskerControl Protocol	TCPUDP	Network Services	caution	61.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :2575HL7 over MLLP

Technical Details

Security Information

Related Ports

Port 2575HL7 over MLLP