TCP SYN (JA4T)
42340_2-1-1-4-1-3_1460_11
first seen 2026-07-06 02:39 · last seen 2026-09-14 16:41 · JSON
Last 7 days (6 observations)
Distinct clients per day (last 30 days, peak 47/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 | 42340 |
|---|---|
| Option kinds | 2-1-1-4-1-3 |
| MSS | 1460 |
| Window scale | 11 |
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 |
|---|---|
t12d290700_fc2078a0b8c0_8c06664c3ac5 | 14 |
t13d1510h2_8daaf6152771_560390466015 | 5 |
t13d1516h2_8daaf6152771_e5627efa2ab1 | 5 |
t13d1715h2_5b57614c22b0_a54fffd0eb61 | 4 |
t13d1512h2_8daaf6152771_cbb9361b6bf9 | 4 |
t12d130600_2d7513195f68_e51b7354d87f | 4 |
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. | 2 |
t13d0711h2_22f0bf307b3c_9ced094328c9 | 2 |
t13d1310h2_ccf33812d0e6_560390466015 | 2 |
t13d1311h2_edb54ad08731_9ced094328c9 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn04enus_989c7cc05c9b_000000000000_000000000000 | 113 |
ge20nn12enus_60f823d07c94_000000000000_000000000000 | 8 |
ge11nn06en00_3011d71998e2_000000000000_000000000000 | 7 |
ge11nn040000_bfa5a9b89dd6_000000000000_000000000000 | 7 |
ge20nr11enus_187a9385d229_000000000000_000000000000 | 4 |
ge11nr040000_e1d2031bdfea_000000000000_000000000000 | 4 |
ge11nn06enus_21ea1759749c_000000000000_000000000000 | 2 |
ge11nr07*000_ac4db679fb33_000000000000_000000000000 | 1 |
ge20nn11enus_3901d4197baf_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 153.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge20nn12enus_a72b71f519fc_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p | 113 |
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 4 |
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. | 3 |
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:42|m,p,a,s | 2 |
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 155.0, firefox 154.0, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
2:0;4:4194304;3:100|10485760|1:0:0:255|m,s,p,a | 1 |
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
DE · Germany | 142 |
MN · Mongolia | 4 |
AT · Austria | 3 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS60729 · Stiftung Erneuerbare Freiheit | 131 |
AS197540 · netcup GmbH | 14 |
AS45204 · GEMNET LLC | 4 |