User-Agent

schannel-defaults-experiment

first seen 2026-10-13 12:06 · last seen 2026-10-13 21:00 · JSON

Distinct clients per day (last 30 days, peak 4/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

Browser / clientschannel-defaults-experiment
Noteinferred from the self-declared string — a claim, not a measurement; compare with the wire fingerprints above

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d2013h2_2b729b4bf6f3_e24568c0d440 Match?Exact match in Thumbprint's published controlled catalog captures: winhttp 10.0.20348.1.The fingerprint page shows the full measured match list. More on the catalog.12
t13d1013h2_01be160bb49b_e24568c0d4407

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn010000_a510e5066512_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: java-httpclient 17.0.19, java-httpclient 11.0.31, winhttp 10.0.20348.1, +9 more.The fingerprint page shows the full measured match list. More on the catalog.12
ge20nn020000_9b3c08a48073_000000000000_0000000000007

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:10485760|10420225|0|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: winhttp 10.0.20348.1.The fingerprint page shows the full measured match list. More on the catalog.13
2:0;4:10485760|33488897|0|m,p,a,s6

TCP SYN (p0f)

fingerprintco-occurrences
4:110+18:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:05
4:109+19:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:04
4:110+18:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:03
4:109+19:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:108+20:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:114+14:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:108+20:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1440_813
64240_2-1-3-1-1-4_1440_86

Country

fingerprintco-occurrences
US · United States19

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation19