TCP SYN (JA4T)

29200_2-4-8-1-3_1412_4

first seen 2026-07-19 19:04 · last seen 2026-10-28 05:34 · JSON

Last 7 days (8 observations)

Distinct clients per day (last 30 days, peak 4/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

TCP window29200
Option kinds2-4-8-1-3
MSS1412
Window scale4

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
t13d4412h1_fd39b124ee10_58ed7828516f13
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.8
t13d1515h1_8daaf6152771_0a20fe35d3a54
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.2
t13d301000_1d37bd780c83_3550537cd59b2
t13d1515h1_8daaf6152771_de4a06bb82e32
t13d2013h2_a09f3c656075_7f0f34a4126d Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d2812h2_257f3020b3a2_cbb9361b6bf91

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.13
ge11nn14enus_4a2973d235de_000000000000_0000000000004
ge11nn13enus_9db22d02e17a_000000000000_0000000000002
ge20nr13enus_e2ac93ffb364_000000000000_0000000000002
ge11nn020000_2f58a845b48b_000000000000_0000000000001
ge11nr020000_2f58a845b48b_000000000000_0000000000001
ge20cr06enus_ba5e17eeb7c7_000000000000_0000000000001
ge20nn08ensg_1945e0741196_000000000000_0000000000001
ge11nr19dede_4e9b73ab7510_000000000000_0000000000001
ge11nr19enus_4e9b73ab7510_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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.2
2:0;3:100;4:2097152;9:1|10420225|1:0:0:256|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:48+16:0:1412:mss*20,4:mss,sok,ts,nop,ws:df,id+:06
4:50+14:0:1412:mss*20,4:mss,sok,ts,nop,ws:df,id+:06
4:51+13:0:1412:mss*20,4:mss,sok,ts,nop,ws:df,id+:05
4:43+21:0:1412:mss*20,4:mss,sok,ts,nop,ws:df,id+:04
4:55+9:0:1412:mss*20,4:mss,sok,ts,nop,ws:df,id+:03
4:49+15:0:1412:mss*20,4:mss,sok,ts,nop,ws:df,id+:02
4:44+20:0:1412:mss*20,4:mss,sok,ts,nop,ws:df,id+:02
4:53+11:0:1412:mss*20,4:mss,sok,ts,nop,ws:df,id+:02
4:41+23:0:1412:mss*20,4:mss,sok,ts,nop,ws:df,id+:01
4:45+19:0:1412:mss*20,4:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/77.0.3865.90 Safari/537.362
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.6099.216 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) 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/605.1.15 (KHTML, like Gecko) Version/17.2 Safari/605.1.151
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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 Edg/145.0.0.01

Country

fingerprintco-occurrences
VE · Venezuela6
DZ · Algeria4
MD · Moldova4
BY · Belarus3
PR · Puerto Rico3
MX · Mexico2
PH · Philippines2
AZ · Azerbaijan2
SG · Singapore1
RO · Romania1

Network (ASN)

fingerprintco-occurrences
AS36947 · Telecom Algeria4
AS6697 · Republican Unitary Telecommunication Enterprise Beltelecom3
AS8926 · Moldtelecom SA3
AS8151 · Uninet S.A. de C.V.2
AS11562 · Net Uno, C.A.2
AS30526 · Neptuno Media, Inc.2
AS9299 · Philippine Long Distance Telephone Company1
AS8708 · DIGI ROMANIA S.A.1
AS55430 · Starhub Ltd1
AS48832 · Jordanian mobile phone services Ltd1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog.8