TCP SYN (JA4T)

65535_2-4-8-1-3_1390_10

first seen 2026-07-20 09:25 · last seen 2026-09-09 12:23 · JSON

Last 7 days (1 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 window65535
Option kinds2-4-8-1-3
MSS1390
Window scale10

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
t13d4412h1_fd39b124ee10_58ed7828516f29
t13d1515h1_8daaf6152771_de4a06bb82e37
t13d1515h1_8daaf6152771_0a20fe35d3a55
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +24 more.The fingerprint page shows the full measured match list. More on the catalog.1

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.29
ge11nn13enus_9db22d02e17a_000000000000_0000000000008
ge11nn14enus_4a2973d235de_000000000000_0000000000004
ge20nn14kokr_8763d6297277_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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.1

TCP SYN (p0f)

fingerprintco-occurrences
4:44+20:0:1390:65535,10:mss,sok,ts,nop,ws:df,id+:07
4:48+16:0:1390:65535,10:mss,sok,ts,nop,ws:df,id+:06
4:47+17:0:1390:65535,10:mss,sok,ts,nop,ws:df,id+:05
4:49+15:0:1390:65535,10:mss,sok,ts,nop,ws:df,id+:05
4:43+21:0:1390:65535,10:mss,sok,ts,nop,ws:df,id+:03
4:35+29:0:1390:65535,10:mss,sok,ts,nop,ws:df,id+:02
4:45+19:0:1390:65535,10:mss,sok,ts,nop,ws:df,id+:02
4:34+30:0:1390:65535,10:mss,sok,ts,nop,ws:df,id+:02
4:50+14:0:1390:65535,10:mss,sok,ts,nop,ws:df,id+:02
4:40+24:0:1390:65535,10:mss,sok,ts,nop,ws:df,id+:02

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.361
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 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2225.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.361

Country

fingerprintco-occurrences
PK · Pakistan16
KE · Kenya9
MU · Mauritius4
BD · Bangladesh3
ET · Ethiopia2
BW · Botswana2
KR · South Korea1
ZA · South Africa1
TN · Tunisia1
GH · Ghana1

Network (ASN)

fingerprintco-occurrences
AS33771 · Safaricom Limited9
AS45669 · PMCL /LDI IP TRANSIT9
AS23889 · Mauritius Telecom Ltd4
AS59257 · CMPak Limited4
AS56167 · PTML3
AS24757 · Ethio Telecom2
AS24432 · TM International Bangladesh Ltd.Internet service Provider,Gulshan-1,Dhaka-12122
AS37014 · Mascom Wireless Ltd2
AS327712 · Telecom Algeria1
AS3559 · Korea Telecom1