DIDWW Two-way SIP Trunking
DIDWW Two-way SIP Trunking connects a business PBX with telephone networks over the internet through SIP rather than physical lines.
What DIDWW Two-way SIP Trunking is
DIDWW Two-way SIP Trunking connects a business PBX with telephone networks over the internet through SIP rather than physical lines. DIDWW says the service is available in 241 countries and regions. Local trunking provides outbound calls with DIDWW numbers, guaranteed caller ID, local dialing, emergency services, short codes, and toll-free numbers. International A–Z termination supports global premium routes and can use DIDWW or third-party numbers. Security controls include per-trunk encryption, DIGEST and IP authentication, VPN interconnection, and TLS/SRTP. DIDWW reports 99.998% network uptime and describes its private network as geo-redundant with continuous in-house monitoring. Emergency numbers are routed to the relevant public safety answering point. Setup guides cover Microsoft Teams Direct Routing, 3CX, Asterisk, FreeSWITCH, Avaya, Genesys Cloud CX, and Twilio BYOC. The API manages phone-number inventory, orders, and service configurations programmatically. DIDWW lists support 24/7/365, number porting, and ISO 27001 certification. Services are paid, with per-minute or channel-based plans, no free trial, a $30 minimum balance, and sales activation required for outbound termination.
Good
- Coverage listed across 241 countries and regions
- Local emergency calling and toll-free access
- TLS/SRTP and per-trunk encryption options
- API supports numbers, orders, and configurations
- 24/7/365 support is advertised
Watch out
- No free plan or free trial
- $30 minimum account balance required
- Outbound termination needs sales activation
- Prices vary by destination or channel
Who it suits
This service is aimed at operators, enterprises, IoT providers, and contact centers needing internet-based business calling. It suits teams integrating PBX systems through supported platforms or the API.
Verdict
DIDWW offers local and international SIP trunking with broad geographic coverage, security controls, and integration guides. Budgeting requires checking destination rates or channel pricing, and service activation has stated account and sales requirements.
Plans and prices
From DIDWW Two-way SIP Trunking's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Flat-rate Capacity | — | Volume tiers: 1, 30, 300, or 990+ channels · Country eligibility may affect price and availability · NRC and MRC per channel; rates are discounted at higher volumes. |
| International Outbound Termination | Priced on request | No minimum monthly commitment · Service must be enabled by DIDWW sales · Per minute as calls are made; destination-specific rates are in the downloadable price list. |
| Local Outbound Termination | Priced on request | Requires at least one applicable DID number · Service must be enabled by DIDWW sales · Per minute as calls are made; destination-specific rates are in the downloadable price list. |
| Metered Capacity | Priced on request | Unlimited capacity · No long-term commitment · Country eligibility may affect availability · Per minute; no activation or monthly fee. |
The facts
Each one read from DIDWW Two-way SIP Trunking's own pages, with the date it was checked.
What it does
- API
- The DIDWW API supports programmatic management of phone-number inventory, ordering, and service configurations.checked 4 Oct 2026
- Coverage
- DIDWW says its SIP trunks are available in 241 countries and regions.checked 4 Oct 2026
- Emergency calling
- DIDWW says DID numbers are routed to the relevant public safety answering point for safety and compliance.checked 4 Oct 2026
- Integrations
- DIDWW publishes setup guides for platforms including Microsoft Teams Direct Routing, 3CX, Asterisk, FreeSWITCH, Avaya, Genesys Cloud CX, and Twilio BYOC.checked 4 Oct 2026
- Intended customers
- DIDWW describes the service as serving operators and enterprises, and identifies IoT providers and contact centers as voice use cases.checked 4 Oct 2026
- International trunking
- International A–Z termination supports global premium routes and can use DIDWW or third-party phone numbers.checked 4 Oct 2026
- Local trunking
- Local SIP trunking provides outbound calling with DIDWW phone numbers, guaranteed CLI, local dialing, and access to local emergency services, short codes, and toll-free numbers.checked 4 Oct 2026
- Pricing limits
- A minimum account balance of $30 is required to start using DIDWW services, and outbound termination must be enabled by the sales team.checked 4 Oct 2026
- Resilience
- DIDWW reports 99.998% network uptime and describes its private network as geo-redundant with 24/7/365 in-house monitoring.checked 4 Oct 2026
- Security
- The product page lists per-trunk encryption options, DIGEST and IP authentication, VPN interconnection, and TLS/SRTP security.checked 4 Oct 2026
- Security certification
- DIDWW announced that it received ISO 27001 certification for its information security management system.checked 4 Oct 2026
- Support
- DIDWW advertises customer support availability 24/7/365 and says telecom experts can assist from network planning through deployment.checked 4 Oct 2026
- What it does
- SIP trunking connects a business PBX to local telephone networks over the internet using SIP instead of physical phone lines.checked 4 Oct 2026
The company
- Headquarters
- Dublin, Irelandchecked 28 Sep 2026
