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Wholesale VoIP from a UK-based carrier

A-Z SIP termination with caller ID delivered on every route, DID numbers in 96 countries, SMS and a white-label programme, on one account. Rate decks are prepared for your destinations and tested on a live route before you commit.

What you can buy wholesale

Five products, one interconnect

Wholesale SIP termination

A-Z termination to 218 destinations on direct carrier interconnects. Your caller ID passes end to end, never stripped or substituted.

Wholesale DID numbers

Local, national and toll-free numbers in 96 countries, delivered over SIP into your platform and assigned per customer.

SIP trunks for platforms

Inbound and outbound trunks for hosted PBX, contact-centre and AI voice platforms that serve their own customers.

Wholesale SMS

Verification codes and alerts on the same account as your voice traffic, with a delivery receipt for every message.

White-label reseller programme

Sell voice under your own brand: your portal, your customers, your margin, on the Callivex network.

Coverage by country

Search every destination for fixed, mobile and number availability, with notes on formats and regulation.

Who buys wholesale from us

Built for the businesses that resell, route or build on voice

Carriers and ITSPs buying A-Z termination and numbers at interconnect scale
VoIP resellers who want the network under their own brand
CPaaS and AI voice platforms that need a carrier behind their product
Contact-centre operators running their own switch or platform
Hosted PBX providers serving offices and small businesses

Why carriers pick Callivex

Clear routes, simple settlement, a real counterparty

Clear CLI on every route, and calls into the US and Canada signed for attestation
Per-second billing, usage in real time and daily reconciliation against your switch
Rate decks per destination in CSV, updated with notice
Capacity sized to your traffic, raised ahead of peaks, never shared
A registered UK company with a published SLA, DPA and anti-fraud policy, and a NOC 24 hours a day

How it works

From destination list to live traffic

1. Send your destinations

Your top destinations and the traffic you expect. We reply within one business day.

2. Test a live route

A rate deck for your mix and a test interconnect, so you judge the routes on real calls.

3. Go live

IP authentication from your switch, capacity sized to your traffic, every second billed as a second.

Questions

Wholesale VoIP, answered

What is wholesale VoIP?

Voice carried in volume between carriers and the businesses that resell or build on it: outbound termination to destinations worldwide, phone numbers, and trunks into your own switch or platform, billed per destination.

Do you publish a wholesale rate deck?

Rate decks are prepared per customer from your destination mix and traffic, delivered in CSV and updated with notice. Send your top destinations and we come back with yours, plus a test route.

Is caller ID delivered on every route?

Yes. Your calling number is passed end to end and never substituted. Calls into the United States and Canada are signed for attestation.

Can we buy DID numbers wholesale?

Yes. Local, national and toll-free numbers in 96 countries, assigned per customer and delivered over SIP into your platform.

How is wholesale traffic billed?

Every connected second is billed as a second. Usage is visible in real time and call records reconcile daily against your own switch.

Can we resell under our own brand?

Yes. The partner programme gives you a portal under your brand with your margin on top; we run the carrier side.