TCP SYN (p0f)

4:111+17:0:1360:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-06-18 15:50 · last seen 2026-09-14 04:20 · JSON

Last 7 days (5 observations)

Distinct clients per day (last 30 days, peak 5/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 TTL111+17
Options length0
MSS1360
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
t13d2013h1_2b729b4bf6f3_e24568c0d4404
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.4
t13d2913h1_723694b0fccc_5671b5df50292
t13d311100_e8f1e7e78f70_24695f2957a71
t13d1812h1_85036bcba153_b26ce05bbdd61

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.4
ge20nr16bgbg_94fdc06e0694_000000000000_0000000000002
ge11nn05enus_813e32c09d15_000000000000_0000000000001
ge20nn16bgbg_94fdc06e0694_000000000000_0000000000001
ge20nr16enie_94fdc06e0694_000000000000_0000000000001
ge11nn11heil_835281d8e5d9_000000000000_0000000000001
ge11nr11heil_835281d8e5d9_000000000000_0000000000001
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.1

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.4

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1360_811

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) Chrome/152.0.0.04
Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/150.0.0.0 Mobile/15E148 Safari/604.12
Mozilla/5.0 (Linux; Android 13; SM-A546B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.361
Mozilla/5.0 (Linux; Android 14; Pixel 8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 14; 23054RA19C) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361

Country

fingerprintco-occurrences
JP · Japan5
BG · Bulgaria3
IL · Israel2
KH · Cambodia1
GH · Ghana1

Network (ASN)

fingerprintco-occurrences
AS8866 · Vivacom Bulgaria EAD3
AS2527 · Sony Network Communications Inc.3
AS4713 · NTT DOCOMO BUSINESS,Inc.2
AS1680 · Cellcom Fixed Line Communication L.P2
AS147023 · ESURFING TECHNOLOGY CO.LTD1
AS328494 · 3D WIRELESS PLUS LIMITED1