TCP SYN (JA4T)
65535_2-1-3-1-1-4_1400_8
first seen 2026-06-30 06:59 · last seen 2026-09-14 14:56 · JSON
Last 7 days (6 observations)
Distinct clients per day (last 30 days, peak 14/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 | 1400 |
| 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. | 45 |
t13d2913h1_723694b0fccc_5671b5df5029 | 29 |
t13d2014h2_a09f3c656075_14788d8d241b | 16 |
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. | 13 |
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. | 13 |
t13d1516h2_8daaf6152771_e5627efa2ab1 | 8 |
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. | 7 |
t13d1714h2_5b57614c22b0_3dd24b5ebec4 | 6 |
t13d591000_a33745022dd6_1f22a2ca17c4 | 5 |
t13d1715h2_5b57614c22b0_a54fffd0eb61 | 4 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn030000_6dac75bd47eb_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog. | 45 |
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 |
ge11nr11fifi_835281d8e5d9_000000000000_000000000000 | 8 |
ge20nr16heil_94fdc06e0694_000000000000_000000000000 | 7 |
ge11nr11frfr_835281d8e5d9_000000000000_000000000000 | 6 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 5 |
ge11nn050000_a72e37bb2523_000000000000_000000000000 | 5 |
ge20nr16enau_94fdc06e0694_000000000000_000000000000 | 5 |
ge20nr16fifi_94fdc06e0694_000000000000_000000000000 | 5 |
ge20nr12zhcn_54b4638ab28b_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. | 61 |
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. | 10 |
4:4194304;3:100|10485760|1:1:0:256|m,s,p,a | 7 |
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. | 6 |
1:65536;2:0;4:131072;5:16384;9:1|12517377|1:1:0:256|m,p,a,s | 6 |
2:0;3:100;4:2097152;8:1;9:1|10420225|1:1:0:256|m,s,a,p | 5 |
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 5 |
1:65536;2:0;4:131072;5:16384|12517377|1:1:0:256|m,p,a,s | 4 |
4:2097152;3:100|10485760|1:1:0:256|m,s,p,a | 3 |
4:16777216|16711681|0|m,p,a,s | 3 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
EG · Egypt | 50 |
FI · Finland | 22 |
FR · France | 14 |
IL · Israel | 12 |
CN · China | 10 |
AU · Australia | 9 |
PH · Philippines | 7 |
BR · Brazil | 5 |
TH · Thailand | 5 |
MX · Mexico | 4 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS24863 · Link Egypt (Link.NET) | 50 |
AS16086 · DNA Oyj | 16 |
AS5410 · Bouygues Telecom SA | 14 |
AS4134 · CHINANET BACKBONE | 7 |
AS1759 · Telia Finland Oyj | 6 |
AS38195 · Superloop | 5 |
AS12491 · Gilat Telecom Ltd. | 5 |
AS17639 · Converge ICT Solutions Inc. | 4 |
AS36947 · Telecom Algeria | 4 |
AS16116 · Pelephone Communications Ltd. | 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 | 4 |
q13d0311h3_55b375c5d22e_5a1f323ef56d | 1 |