Download websites that use F5 BigIP

About F5 BigIP

When this appliance shows up in a scan, the interesting object is not the website but the organisation behind it. F5 BigIP is hardware or a virtual edition sitting in front of an application, terminating encryption, balancing traffic across servers, filtering requests and absorbing attacks. Nobody buys one for a small site. Presence implies a data centre footprint, a network team, a procurement process and a budget that stretches to appliances and support contracts.

F5 Networks has been shipping the product line since 1997, and the install base reflects that longevity. Licensing is Commercial and moves through enterprise agreements rather than downloads, so every deployment corresponds to a signed contract instead of an idle experiment. Banks, insurers, hospital systems, universities and government departments make up much of the population, which is why the technology works as a proxy for regulated industry when you are filtering a large domain list and have little else to go on.

Honesty about detection matters more here than for most technologies. An appliance is designed to be invisible, and the fingerprints we rely on are indirect: characteristic session cookies, a server header the operator forgot to strip, error pages carrying default styling, particular responses to malformed requests. Any competent administrator can remove all of that, and the security teams at exactly the kind of organisation that buys the product are the ones most likely to do it. Our count is a floor, biased toward operators with looser configuration discipline. A domain absent from the list has not been shown to lack the appliance.

As of October 2026 the fingerprint appears on 29,655 sites, 14,629 of them in United States, with .com the common suffix. Concentration like that follows headquarters rather than audiences, because the appliance is deployed at the corporate edge, and the corporate edge sits where the company lives, not where its customers browse. Reading the country column as a market share figure would be a mistake for any technology bought by network teams.

A list is the only sensible way to work with a signal of this kind. Checking one domain tells you a single company runs the appliance, which its own staff already know. The population view answers questions nobody can answer one lookup at a time: which sectors still push traffic through owned hardware instead of rented delivery networks, how that mix shifts from year to year, which competitors' customers are worth approaching, and which organisations belong in or out of scope when planning a vulnerability study. Vendors of load balancing, application firewalls and edge platforms use the list as a displacement target. Researchers use it to measure the part of the web that still runs through appliances rather than through somebody else's network.