TCP SYN (JA4T)
65535_2-4-8-1-3_1360_8
first seen 2026-07-05 18:23 · last seen 2026-10-28 14:25 · JSON
Last 7 days (18 observations)
Distinct clients per day (last 30 days, peak 10/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 | 1360 |
| 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 | 63 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 38 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 20 |
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. | 16 |
t13d4312h1_c7886603b240_b26ce05bbdd6 | 10 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 2 |
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. | 1 |
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d2014h2_a09f3c656075_14788d8d241b | 1 |
t13d3113h2_e8f1e7e78f70_1b3407e2c936 | 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. | 73 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 51 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 9 |
ge11nr16zhtw_4723467df157_000000000000_000000000000 | 3 |
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, +58 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
ge11nr19zhcn_4e9b73ab7510_000000000000_000000000000 | 2 |
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. | 1 |
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, +36 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge20nr13roro_9e6b72014148_000000000000_000000000000 | 1 |
ge20nn07enus_39faa4ed05e7_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. | 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. | 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, curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
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 |
4:2097152;3:100|10485760|1:0:0:255|m,s,p,a | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
PK · Pakistan | 35 |
BR · Brazil | 15 |
IT · Italy | 10 |
BD · Bangladesh | 10 |
US · United States | 7 |
RO · Romania | 5 |
IL · Israel | 5 |
NP · Nepal | 5 |
UA · Ukraine | 4 |
BY · Belarus | 4 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS24499 · Telenor Pakistan | 35 |
AS16232 · Telecom Italia S.p.A. | 7 |
AS8708 · DIGI ROMANIA S.A. | 5 |
AS29571 · Orange Côte d'Ivoire | 4 |
AS28885 · OmanTel NAP | 4 |
AS23752 · Nepal Telecommunications Corporation, Internet Services, | 4 |
AS15895 · "Kyivstar" PJSC | 4 |
AS30985 · Orange Mali SA | 4 |
AS42772 · Unitary enterprise A1 | 3 |
AS7922 · Comcast Cable Communications, LLC | 3 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 16 |
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. | 9 |
0a0a,001d,0017,0018 | 2 |
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 | 1 |
q13d0313h3_55b375c5d22e_eb028bd37c08 | 1 |