TCP SYN (JA4T)
64240_2-1-3-1-1-4_1412_8
first seen 2026-07-10 16:56 · last seen 2026-09-15 04:32 · JSON
Last 7 days (4 observations)
Distinct clients per day (last 30 days, peak 20/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 | 64240 |
|---|---|
| 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. | 77 |
t13d2913h1_723694b0fccc_5671b5df5029 | 75 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 8 |
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. | 7 |
t12d190800_d83cc789557e_7af1ed941c26 | 5 |
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. | 5 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 5 |
t13d2014h2_a09f3c656075_e42f34c56612 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, urlsession 6.1.2, +1 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t12d2109h1_76e208dd3e22_7af1ed941c26 | 1 |
t13d1516h2_8daaf6152771_e5627efa2ab1 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nr16bgbg_94fdc06e0694_000000000000_000000000000 | 16 |
ge20nr16zhsg_94fdc06e0694_000000000000_000000000000 | 12 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 10 |
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, +23 more.The fingerprint page shows the full measured match list. More on the catalog. | 10 |
ge11nr11bgbg_835281d8e5d9_000000000000_000000000000 | 10 |
ge11nr11fifi_835281d8e5d9_000000000000_000000000000 | 6 |
ge20nr16thth_94fdc06e0694_000000000000_000000000000 | 6 |
ge11nr11ensg_835281d8e5d9_000000000000_000000000000 | 5 |
ge11nr11dede_835281d8e5d9_000000000000_000000000000 | 5 |
ge11nr11soso_835281d8e5d9_000000000000_000000000000 | 4 |
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. | 83 |
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. | 5 |
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
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. | 1 |
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
BG · Bulgaria | 38 |
SG · Singapore | 24 |
DE · Germany | 11 |
BR · Brazil | 9 |
TH · Thailand | 9 |
VE · Venezuela | 9 |
PE · Peru | 7 |
BJ · Benin | 6 |
AR · Argentina | 5 |
BY · Belarus | 5 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS8866 · Vivacom Bulgaria EAD | 38 |
AS9506 · Singtel Fibre Broadband | 24 |
AS8881 · 1&1 Versatel GmbH | 10 |
AS265691 · WI-NET TELECOM S.A.C. | 6 |
AS328228 · SOCIETE BENINOISE D'INFRASTRUCTURES NUMERIQUES | 6 |
AS133481 · AIS Fibre | 5 |
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM | 5 |
AS11562 · Net Uno, C.A. | 5 |
AS11664 · Techtel LMDS Comunicaciones Interactivas S.A. | 4 |
AS15557 · Societe Francaise Du Radiotelephone - SFR SA | 4 |
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 | 1 |