TCP SYN (JA4T)

64320_2-4-8-1-3_1340_7

first seen 2026-07-07 09:32 · last seen 2026-10-31 09:50 · JSON

Last 7 days (3 observations)

Distinct clients per day (last 30 days, peak 4/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 window64320
Option kinds2-4-8-1-3
MSS1340
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
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.16
t13d251100_b78ed14e2fd0_ab7e3b40a6775
t13d3013h2_1d37bd780c83_8537cf56674e Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.18.0.The fingerprint page shows the full measured match list. More on the catalog.4
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1515h1_8daaf6152771_0a20fe35d3a51
t13d1713h1_5b57614c22b0_6a3d802a71391

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +39 more.The fingerprint page shows the full measured match list. More on the catalog.17
ge11nr050000_57c5e92682a8_000000000000_0000000000005
ge20nn030000_bf75ddd0bb29_000000000000_0000000000004
ge11nn06enus_caba6ee6695d_000000000000_0000000000001
ge11nr14enus_4a2973d235de_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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.9
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.4
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p4
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:256|m,a,s,p4

TCP SYN (p0f)

fingerprintco-occurrences
4:48+16:0:1340:mss*48,7:mss,sok,ts,nop,ws:df,id+:05
4:49+15:0:1340:mss*48,7:mss,sok,ts,nop,ws:df,id+:04
4:47+17:0:1340:mss*48,7:mss,sok,ts,nop,ws:df,id+:03
4:51+13:0:1340:mss*48,7:mss,sok,ts,nop,ws:df,id+:03
4:53+11:0:1340:mss*48,7:mss,sok,ts,nop,ws:df,id+:03
6:46+18:0:1340:mss*48,7:mss,sok,ts,nop,ws:flow:03
6:49+15:0:1340:mss*48,7:mss,sok,ts,nop,ws:flow:02
4:46+18:0:1340:mss*48,7:mss,sok,ts,nop,ws:df,id+:02
4:45+19:0:1340:mss*48,7:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1340:mss*48,7:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.3617
curl/8.14.14
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361
Mozilla/5.0 (ZZ; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.4 Mobile/15E148 Safari/604.11
curl/8.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.5 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/114.01

Country

fingerprintco-occurrences
US · United States13
DE · Germany5
CH · Switzerland4
NL · Netherlands2
GB · United Kingdom1
BE · Belgium1
FR · France1
FI · Finland1

Network (ASN)

fingerprintco-occurrences
AS11878 · tzulo, inc.6
AS39351 · 31173 Services AB5
AS9009 · M247 Europe SRL4
AS40156 · The Optimal Link Corporation3
AS17243 · Byte Node LLC3
AS43357 · Owl Limited2
AS212238 · Datacamp Limited1
AS12876 · Scaleway SAS1
AS50304 · Blix Solutions AS1
AS32181 · GigeNET1

TLS supported groups

fingerprintco-occurrences
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog.7
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1, python-requests 2.34.2, curl 8.23.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog.4
11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog.1