TCP SYN (p0f)

4:44+20:0:1452:65535,8:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-19 19:20 · last seen 2026-10-28 14:57 · JSON

Last 7 days (20 observations)

Distinct clients per day (last 30 days, peak 10/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

IP version4
Initial TTL44+20
Options length0
MSS1452
Window size65535
Window scale8
Options layoutmss,sok,ts,nop,ws
Quirksdf,id+
Payload class0

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
t13d4412h1_fd39b124ee10_58ed7828516f20
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.19
t13d1515h1_8daaf6152771_de4a06bb82e313
t13d1515h1_8daaf6152771_0a20fe35d3a512
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.1
t13d4312h1_c7886603b240_b26ce05bbdd61
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 154.0.8037.57, chrome 152.0.7977.64, +24 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1516h1_8daaf6152771_1a63afa7c4781

HTTP request (JA4H)

fingerprintco-occurrences
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.21
ge11nn13enus_9db22d02e17a_000000000000_00000000000018
ge11nn14enus_4a2973d235de_000000000000_0000000000008
ge11nr17enus_021c223ca66c_000000000000_0000000000002
ge11nr16zhtw_4723467df157_000000000000_0000000000002
ge11nr19engb_4e9b73ab7510_000000000000_0000000000002
ge11nr19zhtw_4e9b73ab7510_000000000000_0000000000002
ge11nr17dede_021c223ca66c_000000000000_0000000000002
ge11nr16zhtw_3dfdba18536b_000000000000_0000000000002
ge11nr16frfr_3dfdba18536b_000000000000_0000000000002

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.2

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1452_868

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.365
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.363
Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Mobile/15E148 Safari/604.13
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.362
Mozilla/5.0 (X11; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.362

Country

fingerprintco-occurrences
BR · Brazil20
VN · Vietnam9
ZA · South Africa6
AE · United Arab Emirates6
BD · Bangladesh5
BO · Bolivia4
UZ · Uzbekistan3
MX · Mexico2
KH · Cambodia2
VE · Venezuela2

Network (ASN)

fingerprintco-occurrences
AS27699 · TELEFÔNICA BRASIL S.A6
AS45899 · VNPT Corp5
AS5384 · Emirates Internet5
AS26599 · TELEFÔNICA BRASIL S.A4
AS6568 · EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA4
AS328471 · HERO TELECOMS (PTY) LTD3
AS7552 · Viettel Group2
AS18403 · FPT Telecom Company2
AS38623 · ISP/IXP IN CAMBODIA WITH THE BEST VERVICE IN THERE.2
AS174 · Cogent Communications, LLC1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.19
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1
0a0a,001d,0017,00181