Open CDN detection tool

updates.cdn-apple.com CDN Detection: Possible Amazon CloudFront Usage

CNAME, HTTP header, and ASN signals indicate that updates.cdn-apple.com may be using Amazon CloudFront, with 45% confidence. Review the evidence and latest check time.

Checked At: 10/3/2026, 17:24:01Layered CDN Detected

Multiple CDN Routing Detected

Layered CDN Detected

Current evidence points to Amazon CloudFront and another network, which may indicate layered or regional routing.

updates.cdn-apple.comHTTP Status 403 10/3/2026, 17:24:01

Overall Confidence

45%Evidence strength

Based on the independent evidence matched in this detection

Node Distribution

Current snapshot
Amazon CloudFront 45%Fastly 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: 10/3/2026, 17:24:01
09:24:18 AM
HTTP
header: x-amz-cf-id
Amazon CloudFront

Strong

09:24:18 AM
HTTP
header: x-served-by
Fastly

Strong

Score Explanation

Evidence strength breakdown

HTTP headers
90 / 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
Northern China中国电信220.181.187.51/32--中国 北京市-
0%
1129ms
Western North AmericaOverseas17.253.17.210/32--美国 圣何塞-
0%
50ms
Central node-151.101.3.8/32Amazon CloudFront--14s
45%
-
Southwestern China中国电信117.85.70.7/32--中国 昆明市-
0%
1831ms
East AsiaOverseas151.101.79.8/32--中国香港特别行政区 香港-
0%
809ms
Southern ChinaBGP多线183.3.203.9/32--中国 广州市-
0%
927ms
Eastern North AmericaOverseas2620:149:a09:f000::5/128--美国 波士顿-
0%
25ms
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.
Amazon CloudFrontPrimary candidate

Confidence 45%

header: x-amz-cf-id
View Amazon CloudFront Performance Review
Fastly

Confidence 45%

header: x-served-by
View Fastly Performance Review

Layered CDN detected. The outermost layer appears to be Amazon CloudFront.

Methodology and limitations

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