TCP SYN (JA4T)

65535_2-4-8-1-3_1460_2

first seen 2026-07-19 02:31 · last seen 2026-10-28 16:01 · JSON

Last 7 days (4 observations)

Distinct clients per day (last 30 days, peak 54/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
MSS1460
Window scale2

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
t13d2013h1_2b729b4bf6f3_e24568c0d440468
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.214
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.45
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.43
t13d1311h1_f57a46bbacb6_e7c2852226516
t13d1518h2_8daaf6152771_4980c97edce03
t13d311200_1d947a95fc68_7e1102d2036b Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 17.0.19.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0, curl 7.88.1, curl 8.21.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.468
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.259
ge20nr12enus_54b4638ab28b_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 152.0.7977.83, chrome 151.0.7922.137, +61 more.The fingerprint page shows the full measured match list. More on the catalog.13
ge20nn14enus_00c893c2b404_000000000000_0000000000008
ge20nr13enus_0c2c1d640f3e_000000000000_0000000000007
ge11nr040000_8391bea91fb6_000000000000_0000000000006
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.5
ge20nn14zhhk_00c893c2b404_000000000000_0000000000004
ge20nr09enus_d05bf764aa1e_000000000000_0000000000002
ge11nn040000_c41ada48459b_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.214
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.45
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.15
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 152.0.7977.83, +85 more.The fingerprint page shows the full measured match list. More on the catalog.11
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p6
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +26 more.The fingerprint page shows the full measured match list. More on the catalog.3
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 133.0.6943.16, chrome 156.0.8078.48, chrome 150.0.7871.128, +3 more.The fingerprint page shows the full measured match list. More on the catalog.3
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:51+13:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:0108
4:49+15:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:0107
4:52+12:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:0102
4:48+16:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:0101
4:50+14:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:0100
4:47+17:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:070
4:53+11:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:048
4:46+18:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:043
4:54+10:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:026
4:45+19:0:1460:65535,2:mss,sok,ts,nop,ws:df,id+:020

User-Agent

fingerprintco-occurrences
curl/8.21.0468
curl/8.5.0214
curl/8.14.145
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.3636
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.367
Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.06
Mozilla/5.0 (iPhone; CPU iPhone OS 26_0_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/154.0.8037.41 Mobile/15E148 Safari/604.13
ResearchGateBot/1.0 (+https://www.researchgate.net/)2

Country

fingerprintco-occurrences
US · United States778
CA · Canada2
DE · Germany1

Network (ASN)

fingerprintco-occurrences
AS7922 · Comcast Cable Communications, LLC182
AS7018 · AT&T Enterprises, LLC60
AS5650 · Verizon Business48
AS20115 · Charter Communications LLC42
AS10796 · Charter Communications Inc34
AS11427 · Charter Communications Inc30
AS701 · Verizon Business27
AS16591 · Google Fiber Inc.21
AS14593 · Space Exploration Technologies Corporation20
AS19108 · Optimum20

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.3
001d,0017,0018,0019,001e,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: java-httpclient 17.0.19, java-httpclient 11.0.31, java-urlconnection 17.0.19, +2 more.The fingerprint page shows the full measured match list. More on the catalog.2
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog.1