TCP SYN (JA4T)

64800_2-1-3-1-1-4_1412_8

first seen 2026-07-05 16:38 · last seen 2026-10-20 03:35 · JSON

Distinct clients per day (last 30 days, peak 1/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 window64800
Option kinds2-1-3-1-1-4
MSS1412
Window scale8

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.8
t12d190800_d83cc789557e_7af1ed941c262
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
t13d1312h2_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.10, go-net/http 1.26.9, +7 more.The fingerprint page shows the full measured match list. More on the catalog.1
t12d190800_d83cc789557e_16bbda4055b21

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.5
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.2
po11nn07enus_7d361e250c48_000000000000_0000000000002
ge20nr13enus_0c2c1d640f3e_000000000000_0000000000001
po11nn07ptbr_7d361e250c48_000000000000_0000000000001
ge11nn040000_50034e570378_000000000000_0000000000001
ge20nn13enus_5f02a45c9124_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.6
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.2
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 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
6:50+14:0:1412:mss*45,8:mss,nop,ws,nop,nop,sok:flow:04
6:46+18:0:1412:mss*45,8:mss,nop,ws,nop,nop,sok:flow:03
6:37+27:0:1412:mss*45,8:mss,nop,ws,nop,nop,sok:flow:01
6:56+8:0:1412:mss*45,8:mss,nop,ws,nop,nop,sok:flow:01
6:45+19:0:1412:mss*45,8:mss,nop,ws,nop,nop,sok:flow:01
6:49+15:0:1412:mss*45,8:mss,nop,ws,nop,nop,sok:flow:01
6:47+17:0:1412:mss*45,8:mss,nop,ws,nop,nop,sok:flow:01
6:51+13:0:1412:mss*45,8:mss,nop,ws,nop,nop,sok:flow:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.366
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7; x86) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64; rv:154.0) Gecko/20100101 Firefox/154.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7; arm64) AppleWebKit/537.36 (KHTML, like Gecko) Edge/92.0.0.0 Safari/537.361
Mozilla/5.0 (Linux; Android 10; x64) AppleWebKit/537.36 (KHTML, like Gecko) Firefox/90.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil5
US · United States3
MX · Mexico2
NP · Nepal2
ID · Indonesia1

Network (ASN)

fingerprintco-occurrences
AS35847 · Ezee Fiber3
AS8151 · Uninet S.A. de C.V.2
AS7738 · V tal2
AS17501 · WorldLink Communications Pvt Ltd1
AS4761 · INDOSAT Internet Network Provider1
AS262691 · CONECTA LTDA.1
AS45650 · VIA NET COMMUNICATION LTD.1
AS61657 · Jr Net Informatica Ltda - ME1
AS267334 · ABV SERVICES LTDA1

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.1