TCP SYN (JA4T)

65320_2-4-8-1-3_1420_10

first seen 2026-06-29 23:59 · last seen 2026-09-16 04:27 · JSON

Last 7 days (173 observations)

Distinct clients per day (last 30 days, peak 6/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 window65320
Option kinds2-4-8-1-3
MSS1420
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
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.229
t13d1011h1_61a7ad8aa9b6_3a8073edd8ef43
t13d190900_9dc949149365_97f8aa674fd95
t13d1712h1_ab0a1bf427ad_882d495ac3813
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.2
t13d1114h2_c5d436628c5c_d2ecb68026172
t13d1314h2_f57a46bbacb6_fb48f8b98a291
t13d1515h2_1f9c1ec88692_a54fffd0eb611

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn050000_857b5fa3405d_000000000000_00000000000060
ge11nr030000_341eb0d8946c_000000000000_00000000000024
ge20nn050000_277e78b0d503_000000000000_00000000000022
ge20nn020000_fb4f949fd323_000000000000_00000000000022
ge20nn050000_7e80a5f53adf_000000000000_00000000000020
ge11nn030000_341eb0d8946c_000000000000_00000000000019
ge20nn050000_bb384e635ab6_000000000000_00000000000015
ge11nr050000_57c5e92682a8_000000000000_0000000000005
ge20nn030000_bf75ddd0bb29_000000000000_0000000000004
ge20nn030000_80b089f68b8e_000000000000_0000000000003

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;5:16384;6:262144;1:65536|1073741824|0|a,m,p,s199
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.31
2:0;4:65535|67043329|0|m,s,a,p2
1:139264;2:0;4:121760;5:16384|12517377|3:0:0:42|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
4:58+6:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:0272
4:55+9:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:05
4:57+7:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:03
4:50+14:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:02
4:54+10:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:01
4:59+5:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:01
4:52+12:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:01
4:51+13:0:1420:mss*46,10: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/152.0.0.0 Safari/537.3645
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.3629
crusader-worker/1.015
Mozilla/5.0 (compatible; Applebot/0.1; +http://www.apple.com/go/applebot)11
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.3610
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Mobile Safari/537.369
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)7
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Claude-User/1.0; +claudebot@anthropic.com)7
DuckAssistBot/1.1 (https://duckduckgo.com/duckassistbot)7
Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)6

Country

fingerprintco-occurrences
US · United States208
NL · Netherlands31
SG · Singapore19
BE · Belgium12
CA · Canada4
KR · South Korea3
JP · Japan2
GB · United Kingdom2
ES · Spain2
DE · Germany1

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC285
AS5645 · TekSavvy Solutions, Inc.1