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PBX, Peering, Ports & IPs

Ports and IPs for SIPcity’s Network

The IP addresses, ports, and protocols required to connect your devices to SIPcity.

Last updated 13 March 2026

Supported Protocols

UDP (default) — Low latency, 30-second keep-alive
TCP — Reliable transport, 15-minute keep-alive
TLS — Encrypted signalling over TCP
SRTP — Encrypted media streams

Network connectivity

Equinix Fabric private connections to tier-one Australian carriers
BGP routing optimisation
AS Number: AS63971
Firewall IP Range: 103.55.116.0/24
SIP Peering IP: 103.55.116.65

Ports and IP settings

Service	Address or Port
Proxy	call.sipcity.com.au
TCP/TLS Proxy	call.sipcity.com.au port 5061
SIP Peering	103.55.116.65 (or 103.55.116.0/24)
SIP Registration	103.55.116.65 (call.sipcity.com.au)
SIP Port — UDP/TLS	5060, 5061 (ensure transport = TLS)
RTP IPs	103.55.116.58, 103.55.116.37, 103.55.116.36, 103.55.116.35
RTP range	30,000–40,000 (set by customer equipment)
Supported Codecs	PCMA, PCMU, G729, ILBC, Opus, G722
Unsupported Codecs	AMR, G723
DTMF	RFC2833, RFC4733
Dial String (International)	E164
P-Asserted-Identity	P-Asserted-Identity: <sip: [email protected]:5060>
Packetisation time	20 ms

Other ports

Service	Port
RTP and UDPTL	Set by your router (our range: 30,000–40,000)
T.38 (faxing)	4,000–6,000
Fax	fax.sipcity.com.au
Primary NTP	au.pool.ntp.org

Network connectivity via Equinix Fabric

For customers connecting to our services, we use Equinix Fabric to establish secure private virtual connections to multiple tier-one Australian carriers. Our BGP routing is optimised to select the best path across these dedicated connections.

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