Post Office broadband is managed by Post office Ltd.

Post Office Ltd is a retail post office company in the United Kingdom that provides a wide range of products including postage stamps and banking to the public through its nationwide network of post office branches. The company is owned by UK Government Investments.

The Post Office also operates as an internet service provider; providing consumer broadband and phone services and is part of the wider Post Office Limited Group. By February 2019, it had just over half a million customers across the UK. Post Office provides asymmetric digital subscriber line broadband and fibre broadband internet products (FTTC) to residential customers.

Post Office offers two variants of router: A standard Wi-Fi router (Zyxel AMG1302-T11C) router with its ADSL broadband packages and the Zyxel VMG3925-B10B with its Fibre broadband packages. Post Office Broadband and Phone services are currently supplied using the TalkTalk network and it operates UK-based call centres, with teams based in Preston, Selkirk and Chiswick.

In June 2015, the Post Office launched its own mobile virtual network operator service, Post Office Mobile. However, in August 2016 it decided “to conclude the trial as the results did not give us sufficient confidence that mobile will contribute to our goal of commercial sustainability”.

In February 2021, the Post Office agreed to sell its broadband and phone services to Shell Energy and exit the telecoms market. The deal was believed to have cost Shell around £80million, with around 500,000 customers transferring to the new provider.

Post Office also runs its own flat-rate 118 Directory Enquiries service (118 855). Mobile phone top-ups are also available in Post Office branches on behalf of all the major UK mobile networks.