TCP SYN (JA4T)

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

first seen 2026-07-05 01:43 · last seen 2026-09-14 01:51 · JSON

Last 7 days (20 observations)

Distinct clients per day (last 30 days, peak 11/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_ab7e3b40a67770
t13d3113h1_e8f1e7e78f70_d339722ba4af50
t13d3112h1_e8f1e7e78f70_24695f2957a731
t13d191100_9dc949149365_be53661681a411
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.5

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr020000_fb4f949fd323_000000000000_00000000000070
ge11nn030000_7dedce931117_000000000000_00000000000050
ge11nn020000_818f42cc3fd7_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.1.0, php-guzzle 8.2.0, php-guzzle 8.0.2, +7 more.The fingerprint page shows the full measured match list. More on the catalog.11
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
ge11nn060000_59ac9c97ec52_000000000000_0000000000006
ge11nn060000_f6476fbaf741_000000000000_0000000000006
ge11nn080000_a58534804c1b_000000000000_0000000000006
ge11nn050000_70510fe33346_000000000000_0000000000006
ge20nn10enus_f7ad313dcc59_000000000000_0000000000005

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 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.70
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, +43 more.The fingerprint page shows the full measured match list. More on the catalog.5

TCP SYN (p0f)

fingerprintco-occurrences
6:52+12:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:036
6:48+16:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:031
6:51+13:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:026
6:54+10:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:021
6:50+14:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:020
6:53+11:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:09
6:47+17:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:07
6:46+18:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:06
6:49+15:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:06
6:44+20:0:1440:mss*45,7:mss,nop,nop,sok,nop,ws:flow:03

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/537.3670
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.3655
python-urllib3/2.7.019
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.134 Safari/537.3611
ncsrv6
SSLVPN-Client/3.06

Country

fingerprintco-occurrences
US · United States127
DE · Germany22
CA · Canada15
GB · United Kingdom2
AU · Australia1

Network (ASN)

fingerprintco-occurrences
AS14061 · DigitalOcean, LLC139
AS63949 · Akamai Connected Cloud17
AS12816 · Leibniz-Rechenzentrum11