TCP SYN (p0f)

4:116+12:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-07-15 09:19 · last seen 2026-10-25 11:03 · JSON

Last 7 days (1 observations)

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 TTL116+12
Options length0
MSS1440
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.6
t13d1812h1_85036bcba153_b26ce05bbdd62
t13d1516h1_8daaf6152771_1a63afa7c4782
t13d201200_2b729b4bf6f3_e24568c0d4401
t13d1712h1_ab0a1bf427ad_882d495ac3811

HTTP request (JA4H)

fingerprintco-occurrences
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.3
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, +36 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge11nn13enus_9db22d02e17a_000000000000_0000000000002
ge20nr16enau_94fdc06e0694_000000000000_0000000000002
po11nn07enin_7d361e250c48_000000000000_0000000000001
ge20nr16engb_94fdc06e0694_000000000000_0000000000001
ge20nn16engb_94fdc06e0694_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, +57 more.The fingerprint page shows the full measured match list. More on the catalog.6

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1440_812

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (research-diagnostic)3
Mozilla/5.0 (Linux; Android 14; SM-S921B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile 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/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.361
Mozilla/5.0 (Linux; Android 14; SM-S926B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
IN · India4
AU · Australia3
BD · Bangladesh3
GB · United Kingdom2

Network (ASN)

fingerprintco-occurrences
AS137568 · SKY SYSTEMS LTD3
AS7545 · TPG Telecom Limited2
AS48945 · OPEN FIBRE NETWORKS (WHOLESALE) LIMITED2
AS24309 · Atria Convergence Technologies Pvt. Ltd. Broadband Internet Service Provider INDIA1
AS55577 · Atria Convergence Technologies Ltd.,1
AS9443 · Vocus Retail1
AS133676 · Precious netcom pvt ltd1
AS136946 · Weebo networks Pvt Ltd1

TLS supported groups

fingerprintco-occurrences
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, powershell 7.6.8, +1 more.The fingerprint page shows the full measured match list. More on the catalog.1
0a0a,001d,0017,00181