TCP SYN (JA4T)
65535_2-4-8-1-3_1400_8
first seen 2026-07-06 12:35 · last seen 2026-09-15 07:09 · JSON
Last 7 days (15 observations)
Distinct clients per day (last 30 days, peak 60/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 | 1400 |
| 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 |
|---|---|
t13d4412h1_fd39b124ee10_58ed7828516f | 386 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 158 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 136 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 15 |
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. | 5 |
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. | 3 |
t13d1517h2_8daaf6152771_b1ff8ab2d16f | 3 |
t13d3013h2_1d37bd780c83_8537cf56674e | 2 |
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. | 1 |
t13d1516h2_8daaf6152771_e5627efa2ab1 | 1 |
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. | 386 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 209 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 100 |
ge20nr13enus_5907f7c6644a_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 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
ge20nn12enau_60f823d07c94_000000000000_000000000000 | 2 |
ge20nr13enus_e2ac93ffb364_000000000000_000000000000 | 2 |
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. | 1 |
ge20nn11enau_ed6b9427de84_000000000000_000000000000 | 1 |
ge20nr14enus_6a1cd6981046_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 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog. | 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 |
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, +7 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
1:65536;2:0;3:1000;4:6291456;6:262144;19162:1744811434|15663105|1:1:0:256|m,a,s,p | 1 |
1:65536;2:0;3:1000;4:6291456;6:262144;55818:3848463936|15663105|1:1:0:256|m,a,s,p | 1 |
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. | 1 |
1:65536;2:0;3:1000;4:6291456;6:262144;27226:1939262885|15663105|1:1:0:256|m,a,s,p | 1 |
1:65536;2:0;3:1000;4:6291456;6:262144;23130:2487988486|15663105|1:1:0:256|m,a,s,p | 1 |
1:65536;2:0;3:1000;4:6291456;6:262144;51850:3464577230|15663105|1:1:0:256|m,a,s,p | 1 |
3:100;4:33554432;2:0|33488897|0|m,p,s,a Match?Exact match in Thumbprint's published controlled catalog captures: php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
PK · Pakistan | 99 |
NG · Nigeria | 66 |
ZA · South Africa | 65 |
IQ · Iraq | 55 |
BD · Bangladesh | 44 |
BR · Brazil | 38 |
MX · Mexico | 29 |
OM · Oman | 23 |
SY · Syria | 21 |
DZ · Algeria | 20 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS36873 · Airtel Networks Limited | 36 |
AS37105 · RAIN GROUP HOLDINGS (PTY) LTD | 35 |
AS59257 · CMPak Limited | 33 |
AS24432 · TM International Bangladesh Ltd.Internet service Provider,Gulshan-1,Dhaka-1212 | 33 |
AS45669 · PMCL /LDI IP TRANSIT | 27 |
AS12091 · MTN SA | 27 |
AS17072 · TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V. | 24 |
AS203214 · Hulum Almustakbal Company for Communication Engineering and Services Ltd | 23 |
AS28885 · OmanTel NAP | 20 |
AS199739 · Earthlink Telecommunications Equipment Trading & Services DMCC | 19 |
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 | 5 |