Port 5045Open Settlement Protocol (OSP)

TCP 5045 is used by Open Settlement Protocol systems for VoIP call authorization, routing, and settlement exchanges.

transport: tcp
in transit: encrypted
assignment: official
risk: 3/10
lookups: 0

also known as osp

Technical Details

what runs on :5045

OSP clients such as softswitches or VoIP gateways connect to an OSP server over TCP, normally using TLS-protected HTTP on port 5045. The application exchange uses XML messages for requests and responses related to call authorization, routing, and usage reporting; TLS certificates are used to authenticate communicating systems. This is a specialized carrier-network protocol, not a general-purpose listener, and implementations may differ in their endpoint and transport configuration.

Security Information

exposure of :5045

risk score

3/ 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 1,610 ports — this one sits 0.4 above.

in transit

encrypted

payloads are protected on the wire

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

OSP exchanges can expose call-routing and usage metadata, and a reachable server is intended to communicate with trusted carrier systems rather than arbitrary internet clients. Keep it restricted to authorized peers and use certificate-based TLS; do not assume that an open port alone indicates a usable or correctly secured OSP service. No specific widely exploited vulnerability is identified here.

Record

iana registry entry

port: :5045
service: Open Settlement Protocol (OSP)
transport: TCP
encryption: tls / encrypted
assignment: iana registered
risk: 3/10caution
category: Network Services
usage: OSP is a standardized protocol used by VoIP carriers and service providers to exchange call authorization, routing, and usage information. It is encountered on OSP client and server systems in carrier networks, rather than on ordinary web or end-user hosts.
lookups: 0rank 993
added: 2026-10-06
updated: 2026-10-06
references: IANA service name registry — port 5045

Something wrong?

This record is maintained by the engineers who use port 5045. 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 2026-10-06.

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

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :5045Open Settlement Protocol (OSP)

Technical Details

Security Information

Related Ports

Port 5045Open Settlement Protocol (OSP)