TCP SYN (p0f)

4:104+24:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-07-18 06:37 · last seen 2026-09-07 19:37 · JSON

Distinct clients per day (last 30 days, peak 7/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 TTL104+24
Options length0
MSS1460
Window size65535
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
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.16
t13d2913h1_723694b0fccc_5671b5df50298
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog.2
t12d180800_4b22cbed5bed_7af1ed941c261
t13d1515h1_8daaf6152771_0a20fe35d3a51
t13d1515h1_8daaf6152771_de4a06bb82e31

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr16heil_94fdc06e0694_000000000000_0000000000004
ge20nr16kokr_94fdc06e0694_000000000000_0000000000003
ge20nr16engb_94fdc06e0694_000000000000_0000000000002
ge11nn13enus_9db22d02e17a_000000000000_0000000000002
ge20nn16heil_94fdc06e0694_000000000000_0000000000001
po11nn07enus_7d361e250c48_000000000000_0000000000001
ge11nr11zhsg_835281d8e5d9_000000000000_0000000000001
ge11nr11heil_835281d8e5d9_000000000000_0000000000001
ge11nn11engb_b350a6a7c155_000000000000_0000000000001
ge20nr13heil_9e2b86631664_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, +42 more.The fingerprint page shows the full measured match list. More on the catalog.16
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1460_829

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Linux; Android 14; Pixel 9 Pro) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.363
Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Mobile/15E148 Safari/604.12
Mozilla/5.0 (Linux; Android 14; SM-S928B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.0 (Linux; Android 14; Pixel 9) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.0 (Linux; Android 14; 23054RA19C) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.0 (Linux; Android 12; SM-A536B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.0 (iPhone; CPU iPhone OS 18_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Mobile/15E148 Safari/604.12
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.361

Country

fingerprintco-occurrences
IL · Israel7
KR · South Korea5
DK · Denmark5
SG · Singapore4
GB · United Kingdom4
AR · Argentina2
DE · Germany1
US · United States1

Network (ASN)

fingerprintco-occurrences
AS44869 · FIBIA P/S5
AS9506 · Singtel Fibre Broadband4
AS17858 · LG POWERCOMM4
AS12849 · Hot-Net internet services Ltd.4
AS1680 · Cellcom Fixed Line Communication L.P3
AS201838 · Community Fibre Limited2
AS27747 · Telecentro S.A.2
AS212655 · YouFibre Limited2
AS15212 · C Spire1
AS9770 · LG HelloVision Corp.1