What is the difference between ip cloudflare

what is the difference between ip 104.16.0.0/12 and 172.64.0.0/13
because in my experience the difference in routing on ip 104 routing is slower than ip 172

I have 2 websites

1 get ip 104.16.0.0/12

and others get 172.64.0.0/13

websites that get ip 104.16.0.0/12
Often times having problems such as very large pings, routing loss, etc.

for websites that got 172.64.0.0/13
running normally

can anyone tell what happens to web sites that use 104.16.0.0/12 ?

I don’t believe Cloudflare has documented the difference.

yeah, i have 2 website same rack same block ip, same setting, os, etc but difference account cloudflare

i test with :
curl -XGET https://site1.com -I >> get cf-ray: from HK >> problem site
curl -XGET https://site2.com -I >> get cf-ray: from US >> normal site

I do not know why site1.com got very large pings, routing loss, etc.

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