TCP SYN (JA4T)

32120_2-4-8-1-3_1460_7

first seen 2026-06-30 09:18 · last seen 2026-09-15 19:36 · JSON

Last 7 days (14 observations)

Distinct clients per day (last 30 days, peak 3/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 window32120
Option kinds2-4-8-1-3
MSS1460
Window scale7

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_e5728521abd472
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.7
t13i170900_5b57614c22b0_78e6aca7449b6
t13d1517h2_8daaf6152771_dcad5a0539915
t13d190900_9dc949149365_97f8aa674fd95
t13d1812h1_85036bcba153_b26ce05bbdd62
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.2
t13i1909h2_9dc949149365_97f8aa674fd92
t13d3112h1_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.1.0, php-guzzle 8.0.2, php-guzzle 7.14.2, +6 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d3514h1_bfa337485184_678a800b22211

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn10zhcn_9c0cf7475f83_000000000000_00000000000056
ge11nr10zhcn_9c0cf7475f83_000000000000_00000000000015
ge11nr030000_cd680697de12_000000000000_0000000000006
ge11nn050000_57c5e92682a8_000000000000_0000000000005
ge20nr12zhcn_54b4638ab28b_000000000000_0000000000004
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.2
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge11nr040000_8391bea91fb6_000000000000_0000000000002
ge20nr030000_80b089f68b8e_000000000000_0000000000002
ge11nn070000_f395b2c4bb38_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +58 more.The fingerprint page shows the full measured match list. More on the catalog.2
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.2
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.2
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.2
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +21 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 133.0.6943.16, chrome 150.0.7871.128, chromium 148.0.7778.96, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:53+11:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:026
4:52+12:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:024
4:50+14:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:018
4:56+8:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:06
4:51+13:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:05
4:55+9:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:05
4:113+15:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+,ecn:04
4:54+10:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:03
4:47+17:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:03
4:57+7:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:02

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.171
Go-http-client/1.18
libredtail-http6
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.365
curl/8.5.02
Mozilla/5.0 (compatible; research-scan/1.0)2
python-requests/2.32.31
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/139.0.0.0 Safari/537.361
Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)1

Country

fingerprintco-occurrences
US · United States77
NL · Netherlands8
RO · Romania5
HK · Hong Kong SAR China5
VN · Vietnam4
BG · Bulgaria2
FR · France2
KR · South Korea1

Network (ASN)

fingerprintco-occurrences
AS45102 · Alibaba (US) Technology Co., Ltd.71
AS47890 · UNMANAGED LTD5
AS4760 · HKT Limited5
AS211486 · Alferov Aleksey Aleksandrovich5
AS150862 · VPSTTT COMPUTER COMPANY LIMITED4
AS36352 · HostPapa3
AS51167 · Contabo GmbH2
AS20278 · Nexeon Technologies, Inc.2
AS205997 · Vlad Cojuhari2
AS209604 · 2E TELEKOMUNIKASYON LTD STI2