TCP SYN (JA4T)

42340_2-4-8-1-3_1460_13

first seen 2026-06-30 02:56 · last seen 2026-09-10 09:16 · JSON

Last 7 days (1 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 window42340
Option kinds2-4-8-1-3
MSS1460
Window scale13

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
t13d1312h1_f57a46bbacb6_ab7e3b40a67714
t13d2913h1_723694b0fccc_5671b5df502911
t12d130600_2d7513195f68_e51b7354d87f8
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.7
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.6
t13d431200_c7886603b240_d339722ba4af2
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
t13d3013h1_1d37bd780c83_8537cf56674e1
t13d1313h2_f57a46bbacb6_9249cab70c771

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_e1d2031bdfea_000000000000_00000000000012
ge11nr11enus_835281d8e5d9_000000000000_00000000000010
ge20nr16enus_94fdc06e0694_000000000000_0000000000006
ge11nr050000_57c5e92682a8_000000000000_0000000000005
ge20nr12enus_54b4638ab28b_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, edge 151.0.4129.93, +36 more.The fingerprint page shows the full measured match list. More on the catalog.4
ge11nn050000_57c5e92682a8_000000000000_0000000000003
he11nr030000_fe444ad14866_000000000000_0000000000002
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.2
ge11nn040000_50034e570378_000000000000_0000000000001
ge11nn15enus_539710a1d9ef_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.9
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 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.2
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, +21 more.The fingerprint page shows the full measured match list. More on the catalog.1
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 150.0.7871.128, chromium 148.0.7778.96, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1460:mss*29,13:mss,sok,ts,nop,ws:df,id+:017
4:45+19:0:1460:mss*29,13:mss,sok,ts,nop,ws:df,id+:08
4:50+14:0:1460:mss*29,13:mss,sok,ts,nop,ws:df,id+:07
4:51+13:0:1460:mss*29,13:mss,sok,ts,nop,ws:df,id+:06
4:53+11:0:1460:mss*29,13:mss,sok,ts,nop,ws:df,id+:03
4:55+9:0:1460:mss*29,13:mss,sok,ts,nop,ws:df,id+:02
4:52+12:0:1460:mss*29,13:mss,sok,ts,nop,ws:df,id+:02
4:56+8:0:1460:mss*29,13:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1460:mss*29,13:mss,sok,ts,nop,ws:df,id+:02
4:49+15:0:1460:mss*29,13: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/151.0.0.0 Safari/537.366
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 15_7_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Safari/605.1.153
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.362
Mozilla/5.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:149.0) Gecko/20100101 Firefox/149.02
Mozilla/5.0 (Macintosh; Intel Mac OS X 15.7; rv:149.0) Gecko/20100101 Firefox/149.02
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3.1 Safari/605.1.12
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36 Edg/146.0.3856.1092
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
US · United States42
DE · Germany6
NL · Netherlands2
CA · Canada1

Network (ASN)

fingerprintco-occurrences
AS7029 · Windstream Communications LLC20
AS26277 · ServerPoint.com14
AS36352 · HostPapa8
AS63023 · GTHost6
AS202425 · IP Volume inc2
AS6079 · RCN1