TCP SYN (JA4T)
65535_2-1-3-1-1-8-4-0-0_1380_6
first seen 2026-07-07 04:08 · last seen 2026-10-16 18:43 · JSON
Distinct clients per day (last 30 days, peak 1/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 | 2-1-3-1-1-8-4-0-0 |
| MSS | 1380 |
| Window scale | 6 |
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. | 12 |
t13d1516h2_8daaf6152771_e5627efa2ab1 | 11 |
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. | 10 |
t13d2013h2_a09f3c656075_7f0f34a4126d Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 9 |
t13d2014h2_a09f3c656075_14788d8d241b | 9 |
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. | 7 |
t13d2014h2_a09f3c656075_e42f34c56612 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.6.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 6 |
t13d4907h2_0d8feac7bc37_7395dae3b2f3 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1.The fingerprint page shows the full measured match list. More on the catalog. | 6 |
t13d1717h2_5b57614c22b0_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 148.0.2, firefox 144.0.2, firefox 142.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
t12d091100_08d6d9b33cd7_6d6c278f61f2 | 3 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
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, +39 more.The fingerprint page shows the full measured match list. More on the catalog. | 206 |
ge20nn12enus_60f823d07c94_000000000000_000000000000 | 14 |
ge20nn08enus_1945e0741196_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.4.The fingerprint page shows the full measured match list. More on the catalog. | 10 |
ge20nn030000_80b089f68b8e_000000000000_000000000000 | 7 |
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. | 6 |
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. | 5 |
ge20nn07enus_39faa4ed05e7_000000000000_000000000000 | 4 |
ge20nn05zhcn_eff5d0107a3f_000000000000_000000000000 | 4 |
ge11nn060000_928b7c31c81a_000000000000_000000000000 | 3 |
ge20nn04enus_39a3ba4480e8_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog. | 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, +60 more.The fingerprint page shows the full measured match list. More on the catalog. | 216 |
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 8 |
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 8 |
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog. | 6 |
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, +85 more.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
4:16777216|16711681|0|m,p,a,s | 4 |
2:0;3:100;4:2097152;8:1;9:1|10420225|1:0:0:256|m,s,a,p | 4 |
4:4194304;3:100|10485760|1:0:0:255|m,s,p,a | 4 |
4:2097152;3:100|10485760|0|m,s,p,a | 4 |
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:256|m,p,a,s | 4 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
TR · Turkey | 247 |
CN · China | 14 |
LB · Lebanon | 13 |
US · United States | 5 |
NL · Netherlands | 3 |
EE · Estonia | 3 |
DE · Germany | 2 |
IN · India | 1 |
ME · Montenegro | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS9121 · Turk Telekomunikasyon Anonim Sirketi | 247 |
AS9051 · IncoNet Data Management sal | 13 |
AS4812 · China Telecom (Group) | 9 |
AS21928 · T-Mobile USA, Inc. | 5 |
AS24400 · Shanghai Mobile Communications Co.,Ltd. | 4 |
AS216071 · SERVERS TECH FZCO | 3 |
AS3249 · Telia Eesti AS | 3 |
AS62651 · Strong Technology, LLC. | 1 |
AS24560 · Bharti Airtel Ltd., Telemedia Services | 1 |
AS17621 · China Unicom Shanghai network | 1 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
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 |
q13d0311h3_55b375c5d22e_f2a83c8e78ae | 1 |