TCP SYN (p0f)
6:51+13:0:1392:65535,6:mss,sok,ts,nop,ws:flow:0
first seen 2026-10-08 18:00 · last seen 2026-10-30 18:56 · JSON
Last 7 days (9 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
| IP version | 6 |
|---|---|
| Initial TTL | 51+13 |
| Options length | 0 |
| MSS | 1392 |
| Window size | 65535 |
| Window scale | 6 |
| Options layout | mss,sok,ts,nop,ws |
| Quirks | flow |
| Payload class | 0 |
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 | 39 |
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
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. | 2 |
t13d1517h2_8daaf6152771_b1ff8ab2d16f | 2 |
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. | 39 |
ge20nr13enus_e2ac93ffb364_000000000000_000000000000 | 4 |
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. | 3 |
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, +57 more.The fingerprint page shows the full measured match list. More on the catalog. | 7 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-4-8-1-3_1392_6 | 46 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
BR · Brazil | 11 |
PY · Paraguay | 11 |
MX · Mexico | 10 |
AR · Argentina | 9 |
PE · Peru | 3 |
PH · Philippines | 1 |
LK · Sri Lanka | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS11664 · Techtel LMDS Comunicaciones Interactivas S.A. | 18 |
AS28573 · Claro NXT Telecomunicacoes Ltda | 9 |
AS8151 · Uninet S.A. de C.V. | 5 |
AS13999 · Mega Cable, S.A. de C.V. | 3 |
AS12252 · America Movil Peru S.A.C. | 3 |
AS17072 · TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V. | 2 |
AS262381 · NETCOMET Comércio e Serviços Ltda. | 1 |
AS9329 · Sri Lanka Telecom Internet | 1 |
AS271700 · STEC GUAIBA | 1 |
AS263236 · Itelsa | 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. | 36 |
0a0a,001d,0017,0018 | 4 |
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. | 3 |