Wholesale Broadband Explained: The Network Behind Your ISP

Wholesale broadband is connectivity sold to another provider, rather than directly to the household using it. An ISP can buy access to a network, or a more complete wholesale broadband service, then sell you a retail package with its own price, contract, support and features.

That is why your bill might say one company’s name while an engineer from another company works on the connection. The exact arrangement differs between ISPs and addresses; some providers also build their own networks.

The layers behind a broadband package

“Wholesale” describes a business-to-business transaction. It does not identify one particular technology or brand. The wholesale input might be an FTTP access line, a package that carries traffic farther into a provider’s network, or another managed product.

BT Wholesale, for example, offers broadband solutions with aggregation and core network interconnection options using Openreach access circuits. That shows why “wholesaler” does not always mean the company that owns the last stretch of fibre. If you want more detail about the physical network, see how the Openreach network works.

Can two ISPs sell broadband over the same line?

Yes. Several providers can offer packages on the same underlying network where they have wholesale access and choose to serve that address. Openreach says its network is used by hundreds of communications providers. CityFibre describes its FTTP network as wholesale-only and directs customers to the ISP that supplies their service.

Sharing the physical network does not make the packages identical. Retailers can choose different speed tiers, routers, pricing, contract terms, customer support and sometimes their own backhaul or traffic arrangements. The access network still imposes limits: an ISP cannot sell its full-fibre tier to a property that cannot receive that service on the network it uses.

Who controls the price, speed and repairs?

Wholesale and retail prices are separate. The network company charges the provider for an input; the provider sets the consumer package price and has other costs to cover. Ofcom regulates some wholesale terms, including a cap on certain Openreach access prices under its 2026–31 framework, but that does not set every household’s monthly bill or guarantee that all wholesale discounts are passed on.

When comparing broadband, check the address-specific network and technology as well as the retailer’s price, minimum term and support. A “wholesale network” is not itself a promise of faster home Wi-Fi or better customer service. The separate guide to fibre, full fibre and part fibre explains what the physical connection type means.