TCP SYN (JA4T)
65535_2-4-8-1-3_1460_6
first seen 2026-06-30 22:19 · last seen 2026-11-02 20:17 · JSON
Last 7 days (1672 observations)
Distinct clients per day (last 30 days, peak 564/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 | 2-4-8-1-3 |
| MSS | 1460 |
| 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 |
|---|---|
t13d4312h1_c7886603b240_b26ce05bbdd6 | 4902 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 3170 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 2750 |
t13d4412h1_fd39b124ee10_58ed7828516f | 2602 |
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 882 |
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. | 468 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 374 |
t13d2013h1_2b729b4bf6f3_e24568c0d440 | 317 |
t13d3013h2_1d37bd780c83_8537cf56674e Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.18.0.The fingerprint page shows the full measured match list. More on the catalog. | 296 |
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog. | 259 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog. | 7506 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 4541 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 1753 |
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. | 1178 |
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, +40 more.The fingerprint page shows the full measured match list. More on the catalog. | 651 |
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0, curl 8.21.0, curl 7.88.1, +1 more.The fingerprint page shows the full measured match list. More on the catalog. | 327 |
ge20nr12enus_54b4638ab28b_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 152.0.7977.83, chrome 151.0.7922.137, +63 more.The fingerprint page shows the full measured match list. More on the catalog. | 118 |
ge20nn12enus_60f823d07c94_000000000000_000000000000 | 82 |
ge20nr13enus_e2ac93ffb364_000000000000_000000000000 | 50 |
ge20nr13zhcn_e2ac93ffb364_000000000000_000000000000 | 42 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
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. | 880 |
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, +61 more.The fingerprint page shows the full measured match list. More on the catalog. | 843 |
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. | 296 |
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, +87 more.The fingerprint page shows the full measured match list. More on the catalog. | 89 |
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, +26 more.The fingerprint page shows the full measured match list. More on the catalog. | 29 |
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 156.0.8078.48, chrome 150.0.7871.128, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 28 |
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 25 |
2:0;6:262144;4:2097152;1:65536|2031617|0|m,a,s,p | 22 |
2:0;6:262144;4:2097152;3:100|2031617|0|m,s,a,p | 13 |
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. | 10 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 5645 |
AR · Argentina | 1075 |
VE · Venezuela | 950 |
BR · Brazil | 762 |
CO · Colombia | 710 |
FR · France | 622 |
GB · United Kingdom | 569 |
UA · Ukraine | 464 |
MX · Mexico | 405 |
CA · Canada | 368 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS7922 · Comcast Cable Communications, LLC | 1624 |
AS7018 · AT&T Enterprises, LLC | 594 |
AS14593 · Space Exploration Technologies Corporation | 516 |
AS701 · Verizon Business | 487 |
AS28573 · Claro NXT Telecomunicacoes Ltda | 462 |
AS5089 · Virgin Media Limited | 299 |
AS5650 · Verizon Business | 277 |
AS20115 · Charter Communications LLC | 264 |
AS7303 · Telecom Argentina S.A. | 264 |
AS10620 · Telmex Colombia S.A. | 226 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 3748 |
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, +13 more.The fingerprint page shows the full measured match list. More on the catalog. | 528 |
0a0a,001d,0017,0018 | 506 |
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 159.0, firefox 157.0, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 258 |
0a0a,6399,001d,0017,0018 | 68 |
11ec,001d,0017,0018,0019,0100,0101 | 6 |
0a0a,11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.3.3, safari 26.6.2.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
001d,0017,001e,0018,0019,0100,0101 | 4 |
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 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 | 2 |