This page covers the IP addresses and technical details necessary for configuring your FlyNumber services.

Below, you'll find information on where calls originate, supported codecs, and DTMF transport methods to help you set up your system properly.

Illustration of a globe with interconnected nodes and servers, representing global network connections or IP address distribution.

IP Addresses

Calls originate from the following endpoints:

  • 46.19.209.14:5060 (New York POP)
  • 46.19.210.14:5060 (Frankfurt POP)
  • 46.19.212.14:5060 (Los Angeles POP)
  • 46.19.213.14:5060 (Miami POP)
  • 46.19.214.14:5060 (Singapore POP)

RTP traffic may arrive from the following subnet:

  • 46.19.208.0/21
  • RTP port range: 1024-65535

Supported Codecs

  • G.711 A-law/U-law
  • G.729
  • G.723.1
  • L16
  • G.726-16/G.726-40/G.726-32/G.726-24
  • G.721
  • GSM
  • Speex

RTCP

We transmit and receive RTCP packets from port = rtp_port + 1, as recommended in RFC3550.

We're also capable of receiving RTCP packets on the same RTP port. Consider utilizing RTCP conflict avoidance payloads (payload types 72-76).

DTMF Transport Methods

DTMF signaling is supported through:

By default, RFC 2833 is enabled.

Asterisk Configuration Examples