TCP SYN (JA4T)
65535_2-1-3-1-1-4_1360_8
first seen 2026-07-15 06:54 · last seen 2026-09-13 10:13 · JSON
Last 7 days (8 observations)
Distinct clients per day (last 30 days, peak 5/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 | 1360 |
| 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_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. | 14 |
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. | 13 |
t13d2913h1_723694b0fccc_5671b5df5029 | 7 |
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. | 4 |
t13d2013h1_2b729b4bf6f3_e24568c0d440 | 4 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 3 |
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. | 2 |
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.19.0, node-fetch 22.23.1, node-fetch 24.21.0, +6 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nr16itit_94fdc06e0694_000000000000_000000000000 | 5 |
ge20nr12engb_54b4638ab28b_000000000000_000000000000 | 4 |
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
ge20nr14enus_6a1cd6981046_000000000000_000000000000 | 4 |
ge20nn16itit_94fdc06e0694_000000000000_000000000000 | 3 |
ge20nr12kokr_54b4638ab28b_000000000000_000000000000 | 2 |
ge20nr16heil_94fdc06e0694_000000000000_000000000000 | 2 |
ge20nr13deat_9e2b86631664_000000000000_000000000000 | 2 |
ge11nr11heil_835281d8e5d9_000000000000_000000000000 | 2 |
ge20nr12ja00_54b4638ab28b_000000000000_000000000000 | 2 |
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. | 18 |
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. | 8 |
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. | 2 |
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. | 2 |
2:0;4:262144|458753|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 26.4.0.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
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. | 2 |
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:256|m,a,s,p | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
IT · Italy | 10 |
JP · Japan | 8 |
RO · Romania | 5 |
GB · United Kingdom | 5 |
AT · Austria | 4 |
IL · Israel | 4 |
KR · South Korea | 3 |
BR · Brazil | 2 |
CN · China | 2 |
UA · Ukraine | 2 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS16232 · Telecom Italia S.p.A. | 8 |
AS2514 · NTT PC Communications, Inc. | 8 |
AS44646 · Gamesys Ltd. | 5 |
AS5606 · GTS Telecom SRL | 5 |
AS12400 · Partner Communications Ltd. | 4 |
AS8412 · T-Mobile Austria GmbH | 4 |
AS9530 · SHINSEGAE I C Co., Ltd. | 3 |
AS9808 · China Mobile Communications Group Co., Ltd. | 2 |
AS29447 · Iliad Italia S.p.A | 2 |
AS29571 · Orange Côte d'Ivoire | 2 |
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 |
|---|---|
q13d0312h3_55b375c5d22e_178839b6cec1 | 2 |