Telecom infrastructure for builders.
Wholesale phone numbers across 50+ countries, A-Z voice termination, an AI dialer that picks up when nobody else can, and end-to-end infrastructure operated by the team that built it.
$ curl https://api.c0.lt/v1/numbers/buy --data country=LTProducts
One team in Lithuania, every layer of the stack.
Wholesale DIDs across 50+ countries. Local, national, toll-free, mobile. Pick them up by API or in the portal.
A-Z routes with guaranteed CLI delivery and quality monitored continuously, not just at provisioning.
Outbound and inbound AI calling. Books meetings, qualifies leads, triages tickets, hands off cleanly.
We design, build, and run the telephony stack: PBX, SIP, monitoring, and the on-call rotation behind it.
Sister product for small businesses and families. Managed phone system with AI agents already wired in.
From the blog
Notes from the team running this stack.
Setting up wholesale DIDs across 50 countries
What changes when you move from a single number-provider account to a multi-country wholesale setup - and the boring rules every regulator cares about.
A-Z voice termination, explained without jargon
Carriers, routes, CLI tiers, and why wholesale termination is more boring (and reliable) than it sounds.
An AI dialer that books meetings, not a chatbot that wastes them
What separates a useful outbound AI agent from a frustrating one - and why latency, not the LLM, is the real bottleneck.
Talk to a human.
Write to [email protected] or call +370 5 214 1515. A reply lands in your inbox within one business day.
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