TCP SYN (p0f)

4:108+20:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-07-07 02:46 · last seen 2026-10-14 18:21 · JSON

Distinct clients per day (last 30 days, peak 1/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

IP version4
Initial TTL108+20
Options length0
MSS1440
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
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
t13d1913h2_9dc949149365_9249cab70c7710
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.9
t13d1515h1_8daaf6152771_0a20fe35d3a51
t13d201200_2b729b4bf6f3_e24568c0d4401
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +39 more.The fingerprint page shows the full measured match list. More on the catalog.5
ge20nr19enus_9921e9511126_000000000000_0000000000003
ge11nn14enus_4a2973d235de_000000000000_0000000000001
ge20nr13ptbr_d207767482a2_000000000000_0000000000001
ge20nr13ptbr_b42e83a9e240_000000000000_0000000000001
ge20nr13ptbr_1680433d3e0b_000000000000_0000000000001
ge20nr13ptbr_9e60b509b4a5_000000000000_0000000000001
ge20nr13ptbr_87ffcb416d4d_000000000000_0000000000001
ge20nr13ptbr_0b82c3198749_000000000000_0000000000001
ge20nr13ptbr_cef71ea42853_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;6:10485760|1073741824|0|m,a,s,p10
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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.8
1:65536;2:0;4:6291456;6:262144|15663105|3:1:1:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|5:1:3:256|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1440_822

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.3610
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.7444.162 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.361
Mozilla/5.0 (Linux; Android 13; SM-A546B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 14; Pixel 9) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36 OPR/135.0.0.01
Mozilla/5.0 (Linux; Android 10; arm64) AppleWebKit/537.36 (KHTML, like Gecko) Firefox/94.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil13
US · United States3
TH · Thailand2
UA · Ukraine1
MY · Malaysia1
KZ · Kazakhstan1
PE · Peru1

Network (ASN)

fingerprintco-occurrences
AS52875 · M.I.MONTREAL INFORMATICA LTDA10
AS8075 · Microsoft Corporation3
AS133481 · AIS Fibre2
AS9198 · JSC Kazakhtelecom1
AS26599 · TELEFÔNICA BRASIL S.A1
AS52903 · Sglinknet Telecomunicacoes Ltda-ME1
AS267510 · PROVEDOR CRNET TELECOM S.C. MULTIMIDIA EIRELI1
AS264783 · RED INTERCABLE PERU SAC1
AS4818 · DiGi Telecommunications Sdn. Bhd.1
AS206975 · NovaNET1

TLS supported groups

fingerprintco-occurrences
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog.1