TCP SYN (JA4T)
65535_2-1-3-1-1-4_1340_8
first seen 2026-07-05 14:10 · last seen 2026-09-15 15:45 · JSON
Last 7 days (51 observations)
Distinct clients per day (last 30 days, peak 3/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 | 1340 |
| 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. | 59 |
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. | 22 |
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. | 8 |
t13d2913h1_723694b0fccc_5671b5df5029 | 6 |
t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
t13d1812h1_85036bcba153_b26ce05bbdd6 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nr13enus_0c2c1d640f3e_000000000000_000000000000 | 34 |
ge20nr12enus_54b4638ab28b_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, edge 151.0.4129.93, +36 more.The fingerprint page shows the full measured match list. More on the catalog. | 13 |
ge20nn14engb_00c893c2b404_000000000000_000000000000 | 9 |
ge20nr12engb_54b4638ab28b_000000000000_000000000000 | 8 |
ge20nr16itit_94fdc06e0694_000000000000_000000000000 | 6 |
ge20nr12enus_979a40433f82_000000000000_000000000000 | 4 |
ge20nr13enus_016d87568c43_000000000000_000000000000 | 4 |
ge11nr11itit_835281d8e5d9_000000000000_000000000000 | 3 |
ge20nn040000_93743a8df960_000000000000_000000000000 | 3 |
ge20nn16itit_94fdc06e0694_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. | 20 |
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. | 13 |
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. | 6 |
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:256|m,a,s,p | 5 |
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p | 4 |
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:256|m,a,s,p | 4 |
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:256|m,a,s,p | 4 |
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|13:1:0:256|m,a,s,p | 3 |
1:65536;2:0;4:6291456;6:262144|15663105|15:1:0:256|m,a,s,p | 3 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
IL · Israel | 47 |
US · United States | 21 |
IT · Italy | 14 |
SE · Sweden | 13 |
RO · Romania | 3 |
AT · Austria | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS1680 · Cellcom Fixed Line Communication L.P | 47 |
AS9009 · M247 Europe SRL | 25 |
AS39351 · 31173 Services AB | 12 |
AS1267 · WIND TRE S.P.A. | 12 |
AS24608 · WIND TRE S.P.A. | 2 |
AS212238 · Datacamp Limited | 1 |
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 |