Switzerland voice guidelines
Switzerland voice guidelines
Voice calling guidelines for Switzerland (CH), covering reachability, caller ID formats, DTMF support, and emergency services.
Locale overview
| Field | Value |
|---|---|
| Country | Switzerland |
| ISO code | CH |
| Region | Europe |
| Dialing code | +41 |
Reachability
Switzerland supports inbound and outbound calling for domestic, international, and toll-free number types.
| Call type | Inbound | Outbound |
|---|---|---|
| Domestic | Supported | Supported |
| International | Supported | Supported |
| Toll-free | Supported | Supported |
Caller ID
Caller ID format varies by call type and direction.
| Call type | Direction | Format |
|---|---|---|
| Domestic | Inbound | E.164 |
| Domestic | Outbound | Local (non-guaranteed) |
| International | Inbound | E.164 (non-guaranteed) |
| International | Outbound | E.164 |
| Toll-free | Inbound | E.164 |
| Toll-free | Outbound | Local (non-guaranteed) |
DTMF support
DTMF signaling uses RFC 2833 format and is supported in both the inbound and outbound directions.
Emergency services
Calls to emergency services numbers in Switzerland are not supported. Do not use this service for emergency calling.
Compliance note
These guidelines summarize carrier requirements at the time of publication and do not constitute legal counsel. Verify that your implementation complies with all applicable telecommunications regulations in Switzerland.