TCP SYN (JA4T)
64240_2-4-8-1-3_1390_7
first seen 2026-07-27 05:02 · last seen 2026-10-30 18:42 · JSON
Last 7 days (3 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 | 64240 |
|---|---|
| Option kinds | 2-4-8-1-3 |
| MSS | 1390 |
| Window scale | 7 |
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 | 4 |
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. | 4 |
t13d2013h1_2b729b4bf6f3_e24568c0d440 | 2 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 2 |
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. | 1 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 1 |
t13d4412h1_fd39b124ee10_58ed7828516f | 1 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 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. | 5 |
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. | 4 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 3 |
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0, curl 7.88.1, curl 8.21.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 1 |
ge11nr19frfr_4e9b73ab7510_000000000000_000000000000 | 1 |
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. | 4 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 7 |
FR · France | 2 |
ES · Spain | 2 |
IR · Iran | 1 |
PL · Poland | 1 |
KZ · Kazakhstan | 1 |
CL · Chile | 1 |
LB · Lebanon | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS7018 · AT&T Enterprises, LLC | 7 |
AS57269 · DIGI SPAIN TELECOM S.A | 2 |
AS5617 · Orange Polska Spolka Akcyjna | 1 |
AS51207 · Free Mobile SAS | 1 |
AS31404 · LYCATEL DISTRIBUTION UK LIMITED | 1 |
AS52341 · WOM SpA | 1 |
AS48503 · Tele2 Kazakhstan | 1 |
AS48206 · Net Pro sarl | 1 |
AS16322 · Parsan Lin Co. PJS | 1 |
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. | 3 |
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. | 1 |