The four reach tiers
viabandwidth classifies carriers into four reach tiers derived from publicly available RIR IPv4 allocation data and PeeringDB internet exchange membership. The classification uses no CAIDA data, which carries an academic licence incompatible with a commercial directory. The four tiers are backbone, major, regional, and access.
The largest IPv4 allocations and broadest exchange presence. These are the operators whose infrastructure other carriers build on top of.
Large national or regional operators with significant IPv4 allocations and multiple exchange memberships.
Carriers with meaningful but more local footprints, often the strongest providers in their specific markets.
Last-mile and local operators serving end users and enterprises. The long tail of the carrier market.
Why the long tail matters
The most common starting point for transit procurement is a short list of five or ten names: the backbone carriers that appear in every industry conversation. For a buyer in Western Europe or North America with straightforward traffic patterns, that short list will contain adequate options. For a buyer with traffic concentrated in a specific market, with cost sensitivity that rules out backbone pricing, or with latency requirements that favour a shorter path to a regional exchange cluster, the long tail is where the right answer often lives.
The 2,276 regional and 13,121access carriers in viabandwidth's directory are not consolation options. Several of the strongest national operators for their specific markets sit in the regional tier because their footprint is concentrated rather than global. In those markets, the regional carrier often delivers lower latency, more responsive NOC support, and better pricing than a backbone provider whose infrastructure is physically distant.
Geographic distribution
viabandwidth tracks verified carriers in 153 countries. The density is highest in South America, South and Southeast Asia, Europe, and North America, reflecting both the concentration of internet infrastructure and the registration practices of RIRs in each region. A buyer sourcing transit for a market in any of these regions will find multiple local options in the directory.
Country pages exist for every country with at least three verified carriers. They list providers ranked by IPv4 allocation size, so the carriers with the deepest local routing footprint appear first.
What the directory does not cover
viabandwidth verifies carrier status through RIR delegations and PeeringDB registration. A carrier that holds IPv4 space from an RIR and is registered in PeeringDB is verifiable. Carriers that operate without their own IP allocations, purely as resellers or under a hosting provider's block, are harder to verify and may be underrepresented in the directory.
Pricing is not surfaced publicly because transit pricing is negotiated and list prices are rarely published. The operator dossier, unlocked with credits, includes verified sales contact routes for each carrier so buyers can request quotes directly.
How to use the directory
The most useful starting points are the reach-tier hubs (which sort carriers by network size within a tier), the country pages (which show all verified carriers registered in a given country), and the individual carrier profiles (which show IPv4 holdings, announced prefix count, exchange presence count, and links to buyer guides).
For buyers who already know a carrier by name, the profile page links back to the country and reach-tier hubs so you can compare similar-scale alternatives in the same market.