TCP SYN (p0f)

4:40+24:0:1276:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0

first seen 2026-07-23 09:30 · last seen 2026-07-23 09:30 · JSON

Decomposed attributes

IP version4
Initial TTL40+24
Options length0
MSS1276
Window size65535
Window scale6
Options layoutmss,nop,ws,nop,nop,ts,sok,eol+1
Quirksdf,ecn
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
t13d1517h2_8daaf6152771_dcad5a0539913

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12engb_54b4638ab28b_000000000000_0000000000002
ge20nn13engb_0c2c1d640f3e_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +43 more.The fingerprint page shows the full measured match list. More on the catalog.3

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-8-4-0-0_1276_63

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.363

Country

fingerprintco-occurrences
LV · Latvia3

Network (ASN)

fingerprintco-occurrences
AS1257 · Tele2 Sverige AB3