Port 1300H.323 Secure Call Control Signalling

H.323 secure call-control signalling assigned to TCP and UDP port 1300.

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

also known as h323hostcallsc

Technical Details

what runs on :1300

Port 1300 is assigned for secure H.323 call-control signalling over TCP and UDP. It carries call-setup and control messages rather than the media stream, using H.323 security mechanisms associated with ITU-T H.235; H.323 media is normally negotiated onto separate RTP/RTCP ports. Traditional H.323 commonly uses TCP 1720 for Q.931 call signalling, followed by negotiated H.245 and media channels, so port 1300 represents a secure-signalling deployment rather than the usual cleartext call-signalling port.

Security Information

exposure of :1300

risk score

3/ 10caution

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

voice and chat averages 3.3 across 186 ports — this one sits 0.3 below.

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 · udp

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

security overview

Internet exposure can reveal an H.323 endpoint and permit call-setup attempts, scanning, denial-of-service, and attacks against the signalling implementation. Secure signalling protects the protocol exchange but does not eliminate endpoint or parser vulnerabilities; restrict this port to known peers, an SBC, or a VPN rather than exposing it broadly.

Record

iana registry entry

port: :1300
service: H.323 Secure Call Control Signalling
transport: TCPUDP
encryption: tls / encrypted
assignment: iana registered
risk: 3/10caution
category: Voice and Chat
usage: This port is assigned for secure H.323 call-control signalling between H.323 endpoints, gateways, and related systems. It is uncommon on modern public networks; conventional H.323 deployments more often use TCP 1720 for initial call signalling.
lookups: 0rank 993
added: 2026-09-01
updated: 2026-09-22
references: IANA service name registry — port 1300

Something wrong?

This record is maintained by the engineers who use port 1300. 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 2026-09-22.

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edit this record →back to the registry

Related Ports

all 186 in voice and chat →

the 8 most looked-up other ports in voice and chat — 186 ports carry that label.

port	service	proto	category	risk	views
:9090	Openfire Admin Console	TCP	Web Services	caution	34.2k
:1513	Garena Gaming	TCPUDP	Gaming	caution	33.1k
:9091	Openfire Admin Console (SSL)	TCPtls	Web Services	caution	28.3k
:2031	Mobrien Chat	TCPUDP	Web Services	caution	27.7k
:1720	H.323 Signaling	TCP	Network Services	caution	26.5k
:6005	Camfrog Chat	TCP	Voice and Chat	caution	25.2k
:3001	Miralix Phone Monitor	TCP	Network Services	caution	21.7k
:9009	Pichat Server	TCPUDP	Network Services	caution	19.7k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :1300H.323 Secure Call Control Signalling

Technical Details

Security Information

Related Ports

Port 1300H.323 Secure Call Control Signalling