TCP SYN (JA4T)
64240_2-4-8-1-3_1218_7
first seen 2026-07-06 02:35 · last seen 2026-10-19 01:30 · JSON
Distinct clients per day (last 30 days, peak 1/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 | 1218 |
| 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 |
|---|---|
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. | 7 |
t13d1713h1_ab0a1bf427ad_8537cf56674e Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.32.3, python-requests 2.33.1.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
t13d1812h1_85036bcba153_b26ce05bbdd6 | 1 |
t13d1516h2_8daaf6152771_e5627efa2ab1 | 1 |
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 156.0.8078.48, chrome 154.0.8037.57, +27 more.The fingerprint page shows the full measured match list. More on the catalog. | 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. | 4 |
ge20nn15dede_0a06f3270101_000000000000_000000000000 | 4 |
ge20nr14dede_273cb9519eb0_000000000000_000000000000 | 3 |
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, +39 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge20nn11enus_590215e7cd5a_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
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, +60 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|15663105|1:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;47738:868680059|15663105|1:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;27386:168706649|15663105|3:1:0:220|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;18970:1479428376|15663105|1:1:0:220|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;64090:399999276|15663105|1:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;15050:1715851649|15663105|1:1:0:220|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;39642:3994959769|15663105|1:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;27370:1585738322|15663105|1:1:0:256|m,a,s,p | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 10 |
SG · Singapore | 1 |
CA · Canada | 1 |
ES · Spain | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS174 · Cogent Communications, LLC | 8 |
AS212238 · Datacamp Limited | 4 |
AS9009 · M247 Europe SRL | 1 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1, python-requests 2.34.2, curl 8.23.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |