<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">One thing I noticed for probes at homes is sometimes linked to the source DC where the fibre/copper routers are located<div class=""><br class=""></div><div class="">Col</div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 25 Mar 2021, at 12:00, Ponikierski, Grzegorz via ripe-atlas <<a href="mailto:ripe-atlas@ripe.net" class="">ripe-atlas@ripe.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">I would add to it additional problem that some hosts obfuscate probe location even more. For example you can find probes which in reality are located in US but are marked as CN or probes which are in reality in Wisconsin but are marked in California. Of course these are extreme cases. I guess most hosts just put a pin with probe location just somewhere around where it's locate as long it's in the same city. I don't remember, as a host of 3 probes, to get any precise recommendations how to mark probe location. Personally I just put a pin in city district where probe is locate.<o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class=""><o:p class=""> </o:p></span></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Regards,<o:p class=""></o:p></span></div></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Grzegorz</span><span class=""><o:p class=""></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span class=""><o:p class=""> </o:p></span></div><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(181, 196, 223); padding: 3pt 0cm 0cm;" class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><b class=""><span style="font-size: 12pt;" class="">From:<span class="Apple-converted-space"> </span></span></b><span style="font-size: 12pt;" class="">"Mccherry, Paul (Student)" <<a href="mailto:p.mccherry@lancaster.ac.uk" style="color: blue; text-decoration: underline;" class="">p.mccherry@lancaster.ac.uk</a>><br class=""><b class="">Date:<span class="Apple-converted-space"> </span></b>Thursday 2021-03-25 at 11:20<br class=""><b class="">To:<span class="Apple-converted-space"> </span></b>"<a href="mailto:ripe-atlas@ripe.net" style="color: blue; text-decoration: underline;" class="">ripe-atlas@ripe.net</a>" <<a href="mailto:ripe-atlas@ripe.net" style="color: blue; text-decoration: underline;" class="">ripe-atlas@ripe.net</a>><br class=""><b class="">Subject:<span class="Apple-converted-space"> </span></b>[atlas] Probe location obfuscation<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt;" class="">Can anyone confirm the geo-location obfuscation of probes as being up to 1km as per <a href="https://urldefense.com/v3/__https:/atlas.ripe.net/about/faq/*are-the-locations-of-probes-made-public__;Iw!!GjvTz_vk!EWq0OCOmS-1Af9zWmGzygQZxC02O19msR11hqwe7X3bHqvxoqX8Tt17N3fDKNB4$" style="color: blue; text-decoration: underline;" class="">https://atlas.ripe.net/about/faq/#are-the-locations-of-probes-made-public</a><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt;" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt;" class="">I am a Phd student carrying out research on the RIPE atlas platform and an early result seems to indicate 1 probe has an obfuscation of 10km distance but this may be an anomaly or perhaps something not taken into account as yet.</span></div></div></div></div></blockquote></div><br class=""></div></body></html>