[CloudFlare] 查看你所使用的 CloudFlare CDN 節點 區域 /cdn-cgi/trace

若是網站使用了 cloudflare 的 CDN ，可以在域名的後方加上 /cdn-cgi/trace
可以取的相關的訊息。

colo 就是，連線的clinet 使用的 Cloudflare 節點區域。
範例的 colo=HKG 就是使用 Cloudflare 的香港節點。


https://www.reddit.com/cdn-cgi/trace

fl=23f95
h=www.reddit.com
ip=
ts=1450773728.071
visit_scheme=https
uag=Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36 OPR/34.0.2036.25
colo=HKG
spdy=3.1
loc=TW

台灣現在使用 cloudflare的香港節點，之前有一陣子調整在NRT: Tokyo, JP 


CloudFlare加速最佳化設置 – HZSH Site
https://www.hzsh.us/173/cloudflare%E5%8A%A0%E9%80%9F%E6%9C%80%E4%BD%B3%E5%8C%96%E8%A8%AD%E7%BD%AE
Which CloudFlare data centre do I reach? – CloudFlare Support
https://support.cloudflare.com/hc/en-us/articles/200169986-Which-CloudFlare-data-centre-do-I-reach-

The CloudFlare global network | CloudFlare | The web performance & security company
https://www.cloudflare.com/network-map/

Here is a list of CloudFlare PoP location codes and the corresponding city that they're in. A map of our network locations can be found here: https://www.cloudflare.com/network-map

Location Code: City, (State,) Country

AKL: Auckland, NZ
AMS: Amsterdam, NL
ARN: Stockholm, SE
ATL: Atlanta, US
CDG: Paris, FR
DFW: Dallas, US
DOH: Doha, QA
DUB: Dublin, IE
DUS: Dusseldorf, DE
DXB: Dubai, AE
EWR: Newark, US
EZE: Buenos Aires, AR
FRA: Frankfurt, DE
GRU: São Paulo, BR
HKG: Hong Kong, HK
IAD: Ashburn, US
ICN: Seoul, KR
JNB: Johannesburg, ZA
KIX: Osaka, JP
KUL: Kuala Lumpur, MY
KWI: Kuwait City, KW
LAX: Los Angeles, US
LHR: London, GB
LIM: Lima, PE
MAD: Madrid, ES
MAN: Manchester, GB
MBA: Mombasa, KE
MCT, Muscat, OM
MDE: Medellín, CO
MIA: Miami, US
MLE: Melbourne, AU
MRS: Marseille, FR
MXP: Milan, IT
NRT: Tokyo, JP
ORD: Chicago, US
OTP: Bucharest, RO
PDX: Portland, US
PRG: Prague, CZ
SCL: Valparaíso, CL
SEA: Seattle, US
SFO: San Francisco, US
SIN: Singapore, SG
SJC: San Jose, US
SYD: Sydney, AU
TXL: Berlin, DE
VIE: Vienna, IT
WAW: Warsaw, PL
YYZ: Toronto, CA