TCP SYN (JA4T)

64240_2-1-3-1-1-4_1300_8

first seen 2026-07-12 20:04 · last seen 2026-10-30 11:04 · JSON

Last 7 days (3 observations)

Distinct clients per day (last 30 days, peak 2/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 window64240
Option kinds2-1-3-1-1-4
MSS1300
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
t13d1812h1_85036bcba153_b26ce05bbdd64
t13d1411h2_cbb2034c60b8_e7c2852226514
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.3
t13d0516h2_e133e205ac38_d8a2da3f94cd3
t13d4312h1_c7886603b240_b26ce05bbdd62
t13d1712h1_ab0a1bf427ad_882d495ac3812
t13d0516h2_e133e205ac38_02713d6af8622
t13d2913h1_723694b0fccc_5671b5df50292
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
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog.1

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, +36 more.The fingerprint page shows the full measured match list. More on the catalog.9
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.5
ge20nr020000_fb4f949fd323_000000000000_0000000000004
ge11nn060000_4a973ba5b0a7_000000000000_0000000000001
po11nn080000_cf0caf2c2f1f_000000000000_0000000000001
ge20nn11ruru_3901d4197baf_000000000000_0000000000001
ge20nr020000_b89ce445e0b3_000000000000_0000000000001
ge11nn16enus_ec94e3fa46ec_000000000000_0000000000001
ge11nr11frbe_835281d8e5d9_000000000000_0000000000001
ge20nr16heil_94fdc06e0694_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, +57 more.The fingerprint page shows the full measured match list. More on the catalog.10
2:0;4:4194304;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.5
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1
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
4:117+11:0:1300:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:09
4:109+19:0:1300:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:06
4:111+17:0:1300:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:04
4:113+15:0:1300:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:02
4:44+20:0:1300:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:110+18:0:1300:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:114+14:0:1300:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:111+17:0:1300:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:109+19:0:1300:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:107+21:0:1300:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.369
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:77.0) Gecko/20100101 Firefox/77.02
Nx-zDHub2
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
Go-http-client/2.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64)1
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.01

Country

fingerprintco-occurrences
ID · Indonesia12
US · United States9
EG · Egypt2
BR · Brazil1
RO · Romania1
RU · Russia1
IL · Israel1

Network (ASN)

fingerprintco-occurrences
AS40222 · Credit One Bank9
AS154896 · CV Griya Cloud Server6
AS139952 · PT Trisari Data Indonusa5
AS36935 · Vodafone Data2
AS25159 · PJSC MegaFon1
AS47962 · Connect 9721
AS12302 · Vodafone Romania S.A.1
AS270535 · S DE OLIVEIRA FILHO1
AS136862 · DINAS KOMUNIKASI DAN INFORMATIKA KOTA SERANG1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.4
001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog.4