Its been around since like 1996 at least, likely earlier. Its A.B.C.D with A255^3 + B255^2 + C255^1 + D255^0. Used to get around filters a long time ago but b

Its been around since like 1996 at least, likely earlier. Its A.B.C.D with A255^3 + B255^2 + C255^1 + D255^0. Used to get around filters a long time ago but broke as most sites host multiple domains and it needs your browsers 'hostname' it sends it as part of the request to actually return the right site/page.