An inter-hackerspace phone network, built on SIP and IAX2.
dialbridge connects hackerspaces, makerspaces, and technically-minded people through a federated phone network. It runs on open-source telephony (Asterisk), uses standard SIP so any VoIP client works, and is operated by volunteers.
Extensions in the 235 block are hosted at Noisebridge (San Francisco). Other hackerspaces can peer via IAX2 trunks — reach out if you want to connect yours.
Anyone can claim a free 235XXX extension. No account needed, no payments, no tracking.
Get your 235 extension →Dial 9 + hackerspace code + extension number from any 235 phone.
| Hackerspace | Code | Example |
|---|---|---|
| Noisebridge (SF) | 415 | 9415333 — echo test |
| i3Detroit | 313 | 9313XXX |
| Pumping Station: One (Chicago) | 312 | 9312XXX |
If you run an Asterisk server at your hackerspace and want to peer, get in touch. IAX2 trunk setup takes about 20 minutes. See the noisebridge-systems repo for configs and documentation.
Server: zephyr (nthmost.com) — Asterisk 20.9, PJSIP
Protocol: SIP/UDP port 5060, IAX2 for inter-server trunks
Realtime extensions: PostgreSQL via Asterisk ARA
Codecs: ulaw, alaw, opus