TCP SYN (JA4T)
65535_2-1-3-1-1-4_1250_8
first seen 2026-07-10 01:19 · last seen 2026-08-31 09:44 · JSON
Distinct clients per day (last 30 days, peak 3/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 | 2-1-3-1-1-4 |
| MSS | 1250 |
| 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 |
|---|---|
t13d2913h1_723694b0fccc_5671b5df5029 | 8 |
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. | 4 |
t13d201200_2b729b4bf6f3_e24568c0d440 | 2 |
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +24 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nr11nbno_835281d8e5d9_000000000000_000000000000 | 3 |
po11nn07enin_7d361e250c48_000000000000_000000000000 | 2 |
ge11nn11nbno_835281d8e5d9_000000000000_000000000000 | 2 |
ge20nr16nbno_94fdc06e0694_000000000000_000000000000 | 2 |
ge20nr13enus_5907f7c6644a_000000000000_000000000000 | 1 |
ge11nr11nbno_b350a6a7c155_000000000000_000000000000 | 1 |
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, +23 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge20nn16nbno_94fdc06e0694_000000000000_000000000000 | 1 |
ge11nr11nlbe_b350a6a7c155_000000000000_000000000000 | 1 |
ge11nr11nlbe_835281d8e5d9_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, +43 more.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +59 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 | 9 |
IN · India | 4 |
BE · Belgium | 2 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS29695 · Lyse Tele AS | 9 |
AS24560 · Bharti Airtel Ltd., Telemedia Services | 4 |
AS5400 · British Telecommunications Limited | 2 |
Cross-transport links
TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).
| fingerprint | linked observations |
|---|---|
q13d0311h3_55b375c5d22e_653d80c3fe9d | 1 |