Open CDN detection tool

linux.do CDN Detection: Possible Cloudflare Usage

CNAME, HTTP header, and ASN signals indicate that linux.do may be using Cloudflare, with 45% confidence. Review the evidence and latest check time.

Checked At: 10/30/2026, 16:32:25

Likely using Cloudflare

This result is based on public DNS, HTTP, and network signals and may update with later observations.

linux.doHTTP Status 403 10/30/2026, 16:32:25

Overall Confidence

45%Evidence strength

Based on the independent evidence matched in this detection

Node Distribution

Current snapshot
Cloudflare 45%

Detection Path

Complete · 5 stages

DNS Resolution
-

Complete · 6 addresses

CNAME Chain
-

Complete · 1 CNAME found

IP / ASN
-

Complete · 6 IPs, 4 ASNs

HTTP Response
-

Complete · response headers collected

Fingerprint Score
-

Complete · 4 evidence types

Evidence Timeline

Observed facts ordered by collection time

Checked At: 10/30/2026, 16:32:25
08:32:25 AM
HTTP
header: cf-ray
Cloudflare

Strong

Score Explanation

Evidence strength breakdown

HTTP headers
45 / 100

Response header name and value matches

This score presents evidence strength, not statistical probability. A shared ASN or cloud network cannot confirm a CDN on its own.

Node and Routing Differences

Resolution results and access signals observed by region and carrier

Collected just now
RegionCarrierResolved IPCDN ProviderASNLocationTTLConfidenceTTFB
Central node-172.66.166.61/32Cloudflare--299s
45%
-
East AsiaOverseas172.66.166.61/32--中国香港特别行政区 香港-
0%
229ms
Northern China中国电信---中国 北京市-
0%
-
Eastern North AmericaOverseas2606:4700:10::6814:10ea/128--美国 波士顿-
0%
1672ms
Southern ChinaBGP多线---中国 广州市-
0%
-
Southwestern China中国电信---中国 昆明市-
0%
-
Western North AmericaOverseas104.20.16.234/32--美国 圣何塞-
0%
49ms
Node results vary by region, carrier and time7 nodes
Detection results are inferred from public DNS and HTTP signals. Confidence reflects the strength of the matched evidence and does not imply 100% certainty.
CloudflarePrimary candidate

Confidence 45%

header: cf-ray
View Cloudflare Performance Review

Methodology and limitations

Detection results are based on cross-analysis of public DNS, HTTP response headers, and ASN signals; confidence indicates the strength of evidence and does not represent statistical accuracy.