TCP SYN (JA4T)

62720_2-4-8-1-3_1460_7

first seen 2026-07-31 22:38 · last seen 2026-11-01 01:04 · JSON

Last 7 days (55 observations)

Distinct clients per day (last 30 days, peak 44/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 window62720
Option kinds2-4-8-1-3
MSS1460
Window scale7

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
t13d1314h2_f57a46bbacb6_fb48f8b98a29107
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.43
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.8
t13d1714h1_5b57614c22b0_43ade6aba3df6
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, +28 more.The fingerprint page shows the full measured match list. More on the catalog.6
t13i170900_5b57614c22b0_78e6aca7449b4
t13d181100_85036bcba153_d41ae481755e2
t13d3613h1_018971650b2c_b7ee5e09e9b32
t13d4312h1_c7886603b240_b26ce05bbdd61
t13d311100_e8f1e7e78f70_d41ae481755e Match?Exact match in Thumbprint's published controlled catalog captures: rust-hyper 1.11.1, rust-hyper 1.12.0, rust-hyper 1.11.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn030000_bf75ddd0bb29_000000000000_00000000000043
ge11nn050000_5ddb03fb9e99_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.4
ge20nn04enus_39a3ba4480e8_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog.3
ge11nn040000_e1d2031bdfea_000000000000_0000000000002
ge20nn120000_1d5643f8516d_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 156.0.8078.4, chromium 153.0.8010.12, +13 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge11nn06enus_98e697c2fa06_000000000000_0000000000002
he20nr06enus_8955ea8069c0_000000000000_0000000000002
he20nr04en00_4fcaafa6af53_000000000000_0000000000002
ge20nr06enus_16ed9fb13497_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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.107
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.43
2:0;4:4194304;5:16384;6:65856|1073741824|0|a,m,p,s8
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.5
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:53+11:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:073
4:52+12:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:061
4:56+8:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:014
4:54+10:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:09
4:47+17:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:08
4:51+13:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:04
4:57+7:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:03
4:46+18:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:02
4:48+16:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:02
4:50+14:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:02

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 14.2; rv:133.0) Gecko/20100101 Firefox/133.055
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.3651
curl/8.14.143
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.368
understory/0.1 (CT research; https://github.com/0x4b) +contact-via-repo6
libredtail-http4
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.364
f1tym1-scraper/1.0 (+https://f1tym1.com/sources/)2
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 Chrome/120 Safari/537.362
GeneralCrawlBot/0.12

Country

fingerprintco-occurrences
FR · France113
US · United States23
IT · Italy5
IL · Israel5
DE · Germany4
GB · United Kingdom4
ES · Spain4
SA · Saudi Arabia4
NL · Netherlands3
KR · South Korea3

Network (ASN)

fingerprintco-occurrences
AS31898 · Oracle Corporation181

TLS supported groups

fingerprintco-occurrences
11ec,11eb,11ed,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.27.3, go-net/http 1.26.10.The fingerprint page shows the full measured match list. More on the catalog.51
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1, python-requests 2.34.2, curl 8.23.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog.43
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.6
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.4
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.2
001d,0017,001e,0019,00181
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.1