Non-CLI vs CLI Termination — the wholesale VoIP guide
Every wholesale VoIP buyer eventually hits the same fork: non-CLI or CLI? Both deliver voice, but they price and behave very differently. This is the practical breakdown we give new operators before they place their first order.
The short answer
CLI routes preserve the caller ID from A-leg to B-leg — the phone that rings sees the number you sent. Non-CLI routes don't guarantee that: transit carriers may strip, randomise or replace the CLI on its way to the destination. In exchange, non-CLI is dramatically cheaper — often 60–80% below the price of CLI on the same destination.
Side-by-side
| Property | Non-CLI | CLI |
|---|---|---|
| Caller ID (CLI) | Not delivered / rewritten by transit carriers | Delivered end-to-end to the B-leg |
| Also known as | Grey routes, non-transparent routes | White routes, transparent routes |
| Typical ASR | 35–55% depending on destination | 45–65% on tier-1 carriers |
| Typical ACD | 40–120s | 60–180s |
| Per-minute cost | 60–80% cheaper than CLI | Full carrier price |
| Best use | Outbound dialers, IVR, notifications, bulk voice | Enterprise calling, business PBX, DID-based inbound |
| Billing increment | 1/1 (USA 60/6) | 60/6 industry standard |
| KYC required | No | Usually yes |
When non-CLI is the right choice
- • Outbound dialer / predictive dialers — margin lives and dies on per-minute cost.
- • Voice broadcasts and IVR notifications — recipient answer rate matters more than what CLI shows.
- • Test traffic and load tests — cheap enough to burn thousands of minutes.
- • High-volume BPO and call center outbound — non-CLI cuts termination cost by a majority of your OpEx.
When CLI is worth the premium
- • Enterprise calling where the callee needs to identify you.
- • Inbound DID setups where two-way calling requires a matched CLI.
- • Regulated destinations (some EU/UK numbers) that require verified CLI.
How ASR and ACD change between the two
On paper CLI routes have higher ASR because callees are more likely to answer a recognisable number. In practice, a well-maintained non-CLI route with fresh CLIs and rotated upstreams often matches or beats a stale CLI route. What matters more than the label is who runs the route and how often it's rotated — which is why we publish live ASR/ACD per destination and swap the upstream automatically when a route degrades.
Pricing reality check
On our board, USA non-CLI trades around $0.0038/min while USA CLI premium trades near $0.014/min — a 3–4× spread. Multiplied across a 200-agent outbound floor pushing 300k minutes/day, that's the difference between a profitable campaign and a break-even one.
Not sure which one you need?
Sign up, fund $120 USDT, and test both from a single trunk. We'll help you route by destination.