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=LTWholesale + AI
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.
Services + sister product
Custom work where the wholesale stack alone is not enough, and a SOHO product for households and small teams.
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 hello@c0.lt or call +370 5 214 1515. The engineers who built and run the platform are the ones who read these. Pricing requests come back with country-by-country rate sheets; product questions come back with a call. Either way, a real reply lands in your inbox within one business day.
Open the contact form