TCP SYN (JA4T)
64240_2-1-1-4_1460_00
first seen 2026-06-30 12:08 · last seen 2026-10-23 22:26 · 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 | 2-1-1-4 |
| MSS | 1460 |
| Window scale | 00 |
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 |
|---|---|
t13d2913h1_723694b0fccc_5671b5df5029 | 14 |
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. | 6 |
t13d1614h2_86a278354501_53a6d0ab1c42 | 5 |
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. | 3 |
t13d1615h2_86a278354501_a54fffd0eb61 | 2 |
t13d4312h1_c7886603b240_b26ce05bbdd6 | 2 |
t13d3013h2_1d37bd780c83_8537cf56674e Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.18.0.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nr11nbno_835281d8e5d9_000000000000_000000000000 | 8 |
ge20nr11enus_187a9385d229_000000000000_000000000000 | 4 |
ge20nr12enus_a72b71f519fc_000000000000_000000000000 | 3 |
ge20nn16nbno_94fdc06e0694_000000000000_000000000000 | 3 |
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. | 2 |
ge20nn030000_bf75ddd0bb29_000000000000_000000000000 | 1 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 1 |
ge20nr16enau_94fdc06e0694_000000000000_000000000000 | 1 |
ge20nr16kokr_94fdc06e0694_000000000000_000000000000 | 1 |
ge11nr11nbno_b350a6a7c155_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. | 6 |
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. | 6 |
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +32 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
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, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +13 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 158.0.1, firefox 155.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
NO · Norway | 14 |
RU · Russia | 7 |
FR · France | 4 |
CO · Colombia | 3 |
US · United States | 2 |
KR · South Korea | 2 |
AU · Australia | 1 |
VE · Venezuela | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS2116 · GlobalConnect AS2116 | 14 |
AS12389 · PJSC Rostelecom | 7 |
AS3215 · Orange S.A. | 2 |
AS12322 · Free SAS | 2 |
AS10620 · Telmex Colombia S.A. | 2 |
AS17858 · LG POWERCOMM | 2 |
AS38195 · Superloop | 1 |
AS5650 · Verizon Business | 1 |
AS30036 · Mediacom Communications Corp | 1 |
AS61461 · Airtek Solutions C.A. | 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. | 2 |
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 |