TCP SYN (JA4T)

64240_2-4-8-1-3_1400_1

first seen 2026-07-30 22:08 · last seen 2026-09-15 04:42 · JSON

Last 7 days (12 observations)

Distinct clients per day (last 30 days, peak 9/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 window64240
Option kinds2-4-8-1-3
MSS1400
Window scale1

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_de4a06bb82e317
t13d1515h1_8daaf6152771_0a20fe35d3a514
t13d2812h2_257f3020b3a2_cbb9361b6bf94
t13d1713h1_ab0a1bf427ad_ecd0401ec68b Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_00000000000021
ge11nn14enus_4a2973d235de_000000000000_00000000000010
ge20nn020000_b89ce445e0b3_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.0, go-net/http 1.26.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog.4
ge11nn040000_177aea7101ae_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p2
1:65536;2:0;4:6291456;6:262144|15663105|3:0:0:256|m,a,s,p2

TCP SYN (p0f)

fingerprintco-occurrences
4:45+19:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:05
4:46+18:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:04
4:47+17:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:04
4:41+23:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:04
4:52+12:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:03
4:48+16:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:03
4:49+15:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:03
4:50+14:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:03
4:51+13:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:01
4:42+22:0:1400:mss*44,1: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/110.0.0.0 Safari/537.365
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 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/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
BR · Brazil17
SA · Saudi Arabia3
ID · Indonesia2
ZA · South Africa2
TR · Turkey2
PH · Philippines2
IQ · Iraq2
MX · Mexico1
FR · France1
IL · Israel1

Network (ASN)

fingerprintco-occurrences
AS17639 · Converge ICT Solutions Inc.2
AS203214 · Hulum Almustakbal Company for Communication Engineering and Services Ltd2
AS28656 · BTT TELECOMUNICACOES S.A.2
AS43766 · Mobile Telecommunication Company Saudi Arabia Joint-Stock company2
AS265175 · AS SISTEMAS LTDA2
AS264923 · JB Telecom LTDA2
AS35819 · Etihad Etisalat, a joint stock company1
AS8386 · Vodafone Net Iletisim Hizmetler AS1
AS17072 · TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.1
AS20978 · TT Mobil Iletisim Hizmetleri A.S1