TCP SYN (JA4T)
64440_2-4-8-1-3_1432_10
first seen 2026-07-01 15:07 · last seen 2026-10-26 23:40 · JSON
Last 7 days (4 observations)
Distinct clients per day (last 30 days, peak 2/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 | 64440 |
|---|---|
| Option kinds | 2-4-8-1-3 |
| MSS | 1432 |
| Window scale | 10 |
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 |
|---|---|
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 154.0.8037.57, chrome 152.0.7977.64, +24 more.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
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. | 4 |
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, +28 more.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
t13d1515h2_8daaf6152771_a54fffd0eb61 | 3 |
t12d290700_fc2078a0b8c0_8c06664c3ac5 | 2 |
t13d3013h2_1d37bd780c83_8537cf56674e | 2 |
t13d1514h2_8daaf6152771_53a6d0ab1c42 | 2 |
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.21.0, node-fetch 24.19.0, node-fetch 22.23.1, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d3113h1_e8f1e7e78f70_d339722ba4af | 1 |
t13d1616h2_86a278354501_fe7c3632a08d | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nr11enus_187a9385d229_000000000000_000000000000 | 4 |
ge20nr09enus_d05bf764aa1e_000000000000_000000000000 | 3 |
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
ge20nr12engb_54b4638ab28b_000000000000_000000000000 | 2 |
ge20nr14eses_a482706b3270_000000000000_000000000000 | 2 |
ge20nr12enus_a72b71f519fc_000000000000_000000000000 | 1 |
ge11nn040000_bfa5a9b89dd6_000000000000_000000000000 | 1 |
ge20nr12zhcn_54b4638ab28b_000000000000_000000000000 | 1 |
ge20nr12enus_1204b4dfdccd_000000000000_000000000000 | 1 |
ge11nn030000_dd98166e0881_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
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 152.0.7977.83, +81 more.The fingerprint page shows the full measured match list. More on the catalog. | 9 |
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 155.0.1, +31 more.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
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, +57 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|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. | 1 |
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 |
|---|---|
DE · Germany | 12 |
GB · United Kingdom | 6 |
CN · China | 5 |
ES · Spain | 2 |
JO · Jordan | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS4134 · CHINANET BACKBONE | 5 |
AS8881 · 1&1 Versatel GmbH | 5 |
AS3320 · Deutsche Telekom AG | 4 |
AS13037 · Zen Internet Ltd | 4 |
AS5378 · Vodafone Limited | 2 |
AS57269 · DIGI SPAIN TELECOM S.A | 2 |
AS15943 · wilhelm.tel GmbH | 2 |
AS8376 · Jordan Data Communications Company LLC | 1 |
AS12312 · ecotel communication ag | 1 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 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 | 6 |
q13d0312h3_55b375c5d22e_178839b6cec1 | 3 |
q13d0315h3_55b375c5d22e_dc5437974b47 | 1 |
q13d0315h3_55b375c5d22e_78345df32b3a | 1 |