TCP SYN (JA4T)

64800_2-1-1-4-1-3_1440_7

first seen 2026-07-05 01:43 · last seen 2026-10-28 07:27 · JSON

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 20/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 window64800
Option kinds2-1-1-4-1-3
MSS1440
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
t13d2512h2_b78ed14e2fd0_ab7e3b40a677128
t13d3113h1_e8f1e7e78f70_d339722ba4af85
t13d3112h1_e8f1e7e78f70_24695f2957a762
t13d191100_9dc949149365_be53661681a417
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.7
t13d591000_a33745022dd6_1f22a2ca17c42
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 154.0.8037.57, chrome 152.0.7977.64, +24 more.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr020000_fb4f949fd323_000000000000_000000000000128
ge11nn030000_7dedce931117_000000000000_00000000000085
ge11nn020000_818f42cc3fd7_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.2.0, php-guzzle 8.1.0, php-guzzle 8.0.2, +13 more.The fingerprint page shows the full measured match list. More on the catalog.17
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.16
ge11nn060000_59ac9c97ec52_000000000000_00000000000012
ge11nn060000_f6476fbaf741_000000000000_00000000000012
ge11nn080000_a58534804c1b_000000000000_00000000000011
ge11nn050000_70510fe33346_000000000000_00000000000011
ge20nn10enus_f7ad313dcc59_000000000000_0000000000009
ge11nn060000_526c0e287255_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog.128
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.9

TCP SYN (p0f)

fingerprintco-occurrences
6:52+12:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:062
6:51+13:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:059
6:48+16:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:054
6:50+14:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:035
6:54+10:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:032
6:47+17:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:022
6:53+11:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:013
6:49+15:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:09
6:46+18:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:08
6:45+19:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:04

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36128
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.3694
python-urllib3/2.7.030
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.134 Safari/537.3617
ncsrv12
SSLVPN-Client/3.011
python-urllib3/2.8.09
Mozilla/5.0 (compatible; The Lounge IRC Client; +https://github.com/thelounge/thelounge) facebookexternalhit/1.1 Twitterbot/1.02

Country

fingerprintco-occurrences
US · United States241
DE · Germany32
CA · Canada24
AU · Australia3
GB · United Kingdom3

Network (ASN)

fingerprintco-occurrences
AS14061 · DigitalOcean, LLC203
AS63949 · Akamai Connected Cloud81
AS12816 · Leibniz-Rechenzentrum17
AS24940 · Hetzner Online GmbH2

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.36
11ec,11eb,11ed,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.27.3, go-net/http 1.26.10.The fingerprint page shows the full measured match list. More on the catalog.32
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.2
001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog.2