Outbound Dialing

This section describes the dialing format requirements and local routing options for DIDWW Outbound trunks.

Number Format

Calls to DIDWW Outbound gateway should be sent in the E.164 dialing format: country code + area code + subscriber number. Any leading prefixes such as 00 or + will be automatically removed before being passed to the PSTN. The same rule applies for Caller ID. Correct example:

To: Bob <sip:123456789@out.didww.com>  // Called destination number in SIP "To" header
From: Alice <sip:1987654321@Caller.com>  // Caller ID in SIP "From" header

Note

To block calls to unwanted destinations, update the Destination Dialing Settings on your outbound trunk. For detailed instructions, see: Destination Dialing Settings.

Local Routes

Local routes, also referred to as in-country routes, enable calling destinations that may be unreachable when routed via international networks, such as Toll-Free, Shared-Cost, or Emergency numbers.

When a DIDWW local DID is used as the Caller ID and a corresponding in-country route is available, the call is automatically routed via the local route. Using local routes is generally more cost-effective compared to international routing, as local termination rates typically apply.

Local routes are available in the following countries:

Albania	Chile	Finland	Japan	Nigeria	Slovakia
Argentina	China	France	Latvia	North Macedonia	Slovenia
Australia	Costa Rica	Georgia	Lithuania	Norway	South Africa
Austria	Croatia	Germany	Luxembourg	Panama	Spain
Belgium	Cyprus	Hong Kong	Malaysia	Peru	Sweden
Bosnia and Herzegovina	Czech Republic	Hungary	Malta	Poland	Switzerland
Brazil	Denmark	Ireland	Mexico	Portugal	Thailand
Bulgaria	Ecuador	Israel	Netherlands	Serbia	United Kingdom
Canada	Estonia	Italy	New Zealand	Singapore	United States

Note

The listed countries require DIDWW DIDs to be used as Caller ID for local dialing. For more information and country-specific restrictions, please contact our sales department at sales@didww.com .