TCP SYN (JA4T)
65535_2-4-1-1-1-1-1-1-1-1-1-1-1-3_1400_8
first seen 2026-07-19 17:33 · last seen 2026-10-29 14:43 · JSON
Last 7 days (6 observations)
Distinct clients per day (last 30 days, peak 4/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 | 2-4-1-1-1-1-1-1-1-1-1-1-1-3 |
| 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 | 25 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 12 |
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. | 5 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 5 |
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. | 25 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 14 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 3 |
ge11nr19zhtw_4e9b73ab7510_000000000000_000000000000 | 1 |
ge11nr16engb_3dfdba18536b_000000000000_000000000000 | 1 |
ge11nr18zhtw_45ed06ef2081_000000000000_000000000000 | 1 |
ge11nr15enus_944d72baa157_000000000000_000000000000 | 1 |
ge11nr17zhcn_021c223ca66c_000000000000_000000000000 | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
NG · Nigeria | 19 |
PK · Pakistan | 11 |
KZ · Kazakhstan | 8 |
BR · Brazil | 4 |
OM · Oman | 2 |
IR · Iran | 1 |
DZ · Algeria | 1 |
BW · Botswana | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS36873 · Airtel Networks Limited | 19 |
AS56167 · PTML | 10 |
AS26599 · TELEFÔNICA BRASIL S.A | 4 |
AS29555 · Mobile Telecom-Service LLP | 4 |
AS50010 · Omani Qatari Telecommunication Company SAOC | 2 |
AS206026 · Kar-Tel LLC | 2 |
AS45669 · JPL /LDI IP TRANSIT | 1 |
AS44244 · Iran Cell Service and Communication Company | 1 |
AS29355 · Kcell JSC | 1 |
AS48503 · Tele2 Kazakhstan | 1 |
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. | 5 |
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |