SIP Registration: Called Number Format Improvement

resolved · 4 Nov 2026, 21:00

The scheduled maintenance window ended at 4 Nov 2026, 21:00. Closed automatically by the status page.

identified · 4 Nov 2026, 13:48

Components: Inbound Call Termination, SIP Trunks - SIP Registration Window: 2026-11-04T20:00:00+00:00 → 2026-11-04T21:00:00+00:00 ### Summary We have improved the way inbound calls are delivered to customer phone systems (PBXs) over our SIP registration service. The Called Number Format setting on each number present on this service will now control how the dialled number (the SIP “To” header) appears to your PBX when receiving inbound calls. ### Background Until now, our network always delivered the dialled number in full international format with a leading +, for example `+443300880333`. It did this whatever Called Number Format was configured on the number. ### Measures taken Before this change, we updated the Called Number Format on every existing number to **E164+**. This matches exactly what customer PBXs receive today. Inbound calls will keep routing as they do now, and we don't expect any regression. ### What this means for you You can now choose how the dialled number is presented to your PBX: | Called Number Format | Delivered as | |---|---| | E164+ (current setting) | `+443300880333` | | E164 | `443300880333` | | National | `03300880333` | Before you change this setting, make sure your PBX's inbound routing rules match the new format. If they don't, calls may not reach the right destination. New numbers added to your account will match the format of your existing numbers unless you ask for something different. ### Support For questions or help reviewing your settings, please contact support@fusee2.net