Canadian SIP trunking and DID numbers — operated, not just sold

SIP trunking on the Canadian direction

A Canadian SIP trunk is the connection between your phone system and the public network. Your PBX or call center platform — 3CX, Asterisk, FreePBX, FreeSWITCH, or an auto-dialer — talks to VoipTower's network over IP, and that link carries your inbound and outbound Canadian traffic. No physical lines. No per-channel hardware. The trunk is sized to your call volume and the shape of your traffic.

Sizing is not a slider. A predictive dialer pushing cold outbound through Toronto needs concurrency headroom and clean routes; an inbound support desk taking callbacks across two time zones needs the opposite emphasis. We set the trunk up around what your operation actually does, connect it to your stack, run test calls, and stay on the routes after launch. Canadian DID numbers are delivered through that same trunk — part of the package, not a separate product.

Worth noting: the connection method is your choice. IP-to-IP authentication where your platform supports it, or SIP credentials where that fits better. The codecs are G.711 a-law, G.711 μ-law, and G.729 — the set that carries clean Canadian voice without surprises.

NANP numbering: why a Canadian number is genuinely Canadian

Canada uses the North American Numbering Plan — the same +1 system shared with the United States. A number is ten digits: a three-digit area code plus a seven-digit subscriber number, written NPA-NXX-XXXX. That shared plan is exactly why a Canadian number needs a careful read, and it is the part that makes this page about Canada and nowhere else.

The area codes are local, and each one belongs to a province. Toronto's 416, 647, and 437 are Ontario codes — 942 joined them in 2025 when the city ran short of numbering inventory — and Ottawa's 613, 343, and 753 sit in Ontario as well. Montréal answers on 514 and 438, both Quebec codes. British Columbia holds the Vancouver and Lower Mainland cluster: 604, 778, 236, and 672. Calgary's 403, 587, and 825 are Alberta. Canadian area codes, with only three exceptions, stay inside their province, and numbers generally cannot move between provinces — an Ontario code reads as an Ontario presence and stays that way. A 514 line says Montréal to whoever picks up, not somewhere vaguely North American. That locality — provincial and city-level at once — is what an international company is buying with a Canadian number.

There is one structural fact in the numbering plan that drives the pricing further down: NANP does not separate landline and mobile into different number ranges the way European plans do. Both live in the same space. That is the reason Canadian outbound is a single rate rather than a split landline/mobile tariff — it is not a pricing choice, it follows from how the numbers are built.

Onboarding and timelines

Three timelines, kept separate because conflating them sets a false expectation.

The first-time account setup — KYC plus business-case review — clears in around 24 hours. The first Canadian number lands roughly two business days after that. Re-orders in a country you already run sit in the stock model: a five-minute form, then the number delivered from pre-allocated stock, often within an hour and usually inside a business day. Standard B2B KYC applies — legal name, registration details from any country, a business email, a contact, a stated use case. No Canadian incorporation, address, or director is required to hold Canadian numbers.

Two operations already running on the Canadian direction

A metric only means something inside the story it came from, so here are two stories. They belong to two separate international companies running unrelated kinds of traffic on the Canadian direction.

Neither company is a "Canadian client" — both are international operations running on Canadian numbers and Canadian routes. What links the two is that the routes behind them are actively run, not left to drift.

Why this shape of provider fits the Canadian direction

Canada has plenty of capable voice providers. For a company that wants to assemble and run its own voice stack, any of them is a reasonable place to buy the pieces.

VoIP.ms out of Montréal has a deep DID inventory and a self-managed, portal-first model. IXICA is a facilities-based Canadian carrier running SIP trunking and cloud PBX coast to coast. ThinkTel runs a national CLEC voice network with points of presence across the country. VoiceMeUp, also Montréal-based, offers SIP trunking and wholesale voice with bilingual support.

VoipTower is built for the company that does not want to assemble the pieces. The difference is not the numbers — those come from carriers either way, at wholesale-grade rates. The difference is the layer on top: the SIP trunk arrives configured, the routing is set up by engineers, the STIR/SHAKEN-aligned CLI and the compliance review are handled, number reputation is monitored, and the team that built it is the team you talk to when something needs to change. You get wholesale infrastructure with a service contract attached, under one relationship, instead of a number catalog plus an in-house voice engineer you would otherwise have to hire.

There is a Canadian wrinkle that makes the managed layer earn its keep: Canada spans six time zones, from Newfoundland to the Pacific. A single set of Canadian numbers can carry traffic for regions whose business hours never line up, so the routing has to be built around each region's hours — calls sent to the right destination for when that part of the country is open. Configuring that, and adjusting it as an operation grows, is tedious to maintain yourself and ordinary for a team that does it across markets.

A Canadian number, the trunk that carries it, the authentication Canada requires, and the team that runs the routes — that is the Canadian direction, operated rather than just sold.

Other priority countries

Many businesses run Canadian numbers as part of a wider international voice setup. VoipTower covers 25+ countries — with dedicated priority coverage in seven other markets.