CSS hex escapes that cause an external request in-between forward slashes

<div style="background:url(/\09/fuzz.shazzer.co.uk/o2qoytuebuc?09)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/n3kr46s20xq?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/9p8syjsmv3d?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/n31mtdtniq?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/ebg8yc4m28t?00)">

<div style="background:url(/\09/fuzz.shazzer.co.uk/h4h0nqvqx1?09)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/y7tye2l3qo?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/090sp325lci?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/i18tpjoo19b?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/qdw0ixclx69?00)">

<div style="background:url(/\09/fuzz.shazzer.co.uk/1kzzk0trfm8?09)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/rqr1zu20yab?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/ad5z68rbub?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/w7tw8msbjxk?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/yq6hp0apfrj?00)">

<div style="background:url(/\09/fuzz.shazzer.co.uk/tuobu8ri9?09)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/g3iq5wtih58?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/flj6rk9zjfp?00)">

<div style="background:url(/\00/fuzz.shazzer.co.uk/wr1r8n5fs7?00)">

<div style="background:url(/\09/fuzz.shazzer.co.uk/blq0rhb2gm?09)">