TCP SYN (p0f)

4:43+21:0:1398:mss*20,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-10 07:23 · last seen 2026-08-12 03:55 · JSON

Decomposed attributes

IP version4
Initial TTL43+21
Options length0
MSS1398
Window sizemss*20
Window scale9
Options layoutmss,sok,ts,nop,ws
Quirksdf,id+
Payload class0

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
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.8
t13d190900_9dc949149365_97f8aa674fd94

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn14en00_c2507efc711e_000000000000_0000000000006
ge20nr14en00_c2507efc711e_000000000000_0000000000002
ge11nr06en00_421ebe128180_000000000000_0000000000002
ge11nr09en00_6676d60c2e22_000000000000_0000000000001
ge11nn06en00_3d56612f1fdd_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p8

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1398_912

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.368
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.361

Country

fingerprintco-occurrences
CN · China12

Network (ASN)

fingerprintco-occurrences
AS9808 · China Mobile Communications Group Co., Ltd.12