TCP SYN (JA4T)

29200_2-4-8-1-3_1452_4

first seen 2026-07-24 04:18 · last seen 2026-10-28 09:39 · JSON

Last 7 days (7 observations)

Distinct clients per day (last 30 days, peak 6/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
MSS1452
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
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.7
t13d4412h1_fd39b124ee10_58ed7828516f7
t13d1516h1_8daaf6152771_1a63afa7c4781

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.7
ge11nr17frfr_021c223ca66c_000000000000_0000000000002
ge11nn13enus_9db22d02e17a_000000000000_0000000000001
ge11nr19dede_4e9b73ab7510_000000000000_0000000000001
ge11nr16dede_3dfdba18536b_000000000000_0000000000001
ge11nr17dede_021c223ca66c_000000000000_0000000000001
ge11nr18engb_45ed06ef2081_000000000000_0000000000001
ge11nr16zhtw_3dfdba18536b_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:45+19:0:1452:mss*20,4:mss,sok,ts,nop,ws:df,id+:03
4:47+17:0:1452:mss*20,4:mss,sok,ts,nop,ws:df,id+:02
4:52+12:0:1452:mss*20,4:mss,sok,ts,nop,ws:df,id+:02
4:49+15:0:1452:mss*20,4:mss,sok,ts,nop,ws:df,id+:02
4:53+11:0:1452:mss*20,4:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1452:mss*20,4:mss,sok,ts,nop,ws:df,id+:01
4:54+10:0:1452:mss*20,4:mss,sok,ts,nop,ws:df,id+:01
4:48+16:0:1452:mss*20,4:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1452:mss*20,4:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1452:mss*20,4:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 14_0) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.152
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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.151
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4889.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 ADG/11.0.2566 AOLBUILD/11.0.2566 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.80 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.80 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.361

Country

fingerprintco-occurrences
VE · Venezuela4
DZ · Algeria2
RO · Romania1
HU · Hungary1
KH · Cambodia1
BY · Belarus1
IL · Israel1
SK · Slovakia1
SI · Slovenia1
IQ · Iraq1

Network (ASN)

fingerprintco-occurrences
AS21826 · Corporación Telemic C.A.3
AS36947 · Telecom Algeria2
AS8708 · DIGI ROMANIA S.A.1
AS6810 · "Bezeq"- THE ISRAEL TELECOMMUNICATION CORP. LTD.1
AS5603 · Telekom Slovenije, d.d.1
AS6697 · Republican Unitary Telecommunication Enterprise Beltelecom1
AS206206 · Kurdistan Net Company for Computer and Internet Ltd.1
AS38623 · ISP/IXP IN CAMBODIA WITH THE BEST VERVICE IN THERE.1
AS269730 · TECNOVEN SERVICES CA1
AS6855 · Slovak Telekom, a.s.1

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.7