TCP SYN (JA4T)

65535_2-4-8-1-3_1380_9

first seen 2026-07-22 10:33 · last seen 2026-09-15 06:13 · JSON

Last 7 days (8 observations)

Distinct clients per day (last 30 days, peak 7/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 window65535
Option kinds2-4-8-1-3
MSS1380
Window scale9

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
t13d1515h1_8daaf6152771_0a20fe35d3a59
t13d3113h2_e8f1e7e78f70_1b3407e2c9366
t13d1515h1_8daaf6152771_de4a06bb82e34
t13d4412h1_fd39b124ee10_58ed7828516f3
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.1
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 152.0.7977.64, chrome 152.0.7977.65, +5 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn14enus_4a2973d235de_000000000000_0000000000007
ge11nn13enus_9db22d02e17a_000000000000_0000000000006
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.6
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.3
ge20nn14zhcn_8763d6297277_000000000000_0000000000001
ge20nn13dede_0c2c1d640f3e_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:33554432;2:0|33488897|0|m,p,s,a Match?Exact match in Thumbprint's published controlled catalog captures: php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.6
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.2

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1380:65535,9:mss,sok,ts,nop,ws:df,id+:04
4:46+18:0:1380:65535,9:mss,sok,ts,nop,ws:df,id+:03
6:48+16:0:1380:65535,9:mss,sok,ts,nop,ws:flow:03
6:46+18:0:1380:65535,9:mss,sok,ts,nop,ws:flow:03
4:41+23:0:1380:65535,9:mss,sok,ts,nop,ws:df,id+:02
4:45+19:0:1380:65535,9:mss,sok,ts,nop,ws:df,id+:01
4:52+12:0:1380:65535,9:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1380:65535,9:mss,sok,ts,nop,ws:df,id+:01
4:43+21:0:1380:65535,9:mss,sok,ts,nop,ws:df,id+:01
4:51+13:0:1380:65535,9: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/124.0 Safari/537.366
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 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/537.361
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.361

Country

fingerprintco-occurrences
RU · Russia6
MA · Morocco3
KE · Kenya3
QA · Qatar2
AE · United Arab Emirates2
DZ · Algeria2
NL · Netherlands1
BG · Bulgaria1
CN · China1
ZA · South Africa1

Network (ASN)

fingerprintco-occurrences
AS35807 · SkyNet Ltd.3
AS36884 · Wana Corporate3
AS29226 · JSC Mastertel3
AS33771 · Safaricom Limited2
AS8781 · Ooredoo Q.S.C.2
AS327931 · Optimum Telecom Algeria2
AS5384 · Emirates Internet1
AS8866 · Vivacom Bulgaria EAD1
AS15802 · Emirates Integrated Telecommunications Company PJSC1
AS29465 · MTN NIGERIA Communication limited1