TCP SYN (JA4T)
65535_2-1-3-1-1-4_1412_8
first seen 2026-07-07 14:34 · last seen 2026-09-15 04:51 · JSON
Last 7 days (19 observations)
Distinct clients per day (last 30 days, peak 32/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 window | 65535 |
|---|---|
| Option kinds | 2-1-3-1-1-4 |
| MSS | 1412 |
| Window scale | 8 |
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)
| fingerprint | co-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. | 134 |
t13d2913h1_723694b0fccc_5671b5df5029 | 89 |
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, +24 more.The fingerprint page shows the full measured match list. More on the catalog. | 58 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 16 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 10 |
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. | 7 |
t13d1312h2_f57a46bbacb6_ab7e3b40a677 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, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 6 |
t13d4412h1_fd39b124ee10_58ed7828516f | 5 |
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 152.0.7977.64, chrome 152.0.7977.65, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
t13d1812h1_85036bcba153_b26ce05bbdd6 | 3 |
HTTP request (JA4H)
HTTP/2 frames (Akamai)
| fingerprint | co-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, +43 more.The fingerprint page shows the full measured match list. More on the catalog. | 142 |
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 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog. | 10 |
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. | 7 |
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. | 6 |
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +21 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 133.0.6943.16, chrome 150.0.7871.128, chromium 148.0.7778.96, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:220|m,a,s,p | 2 |
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:220|m,a,s,p | 2 |
1:65536;2:0;4:6291456;6:262144|15663105|11:1:0:220|m,a,s,p | 2 |
1:65536;2:0;4:6291456;6:262144|15663105|13:1:0:220|m,a,s,p | 2 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
MD · Moldova | 44 |
SG · Singapore | 35 |
TH · Thailand | 29 |
DE · Germany | 22 |
FI · Finland | 20 |
MX · Mexico | 19 |
BR · Brazil | 17 |
BG · Bulgaria | 15 |
PH · Philippines | 14 |
JP · Japan | 13 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS31252 · StarNet Solutii SRL | 44 |
AS9506 · Singtel Fibre Broadband | 29 |
AS16086 · DNA Oyj | 18 |
AS8866 · Vivacom Bulgaria EAD | 15 |
AS133481 · AIS Fibre | 13 |
AS2527 · Sony Network Communications Inc. | 13 |
AS45758 · Triple T Broadband Public Company Limited | 12 |
AS8151 · Uninet S.A. de C.V. | 11 |
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM | 10 |
AS3320 · Deutsche Telekom AG | 9 |
Cross-transport links
TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).
| fingerprint | linked observations |
|---|---|
q13d0311h3_55b375c5d22e_653d80c3fe9d | 3 |
q13d0312h3_55b375c5d22e_178839b6cec1 | 3 |
q13d0315h3_55b375c5d22e_dc5437974b47 | 1 |