TCP SYN (JA4T)
65535_2-1-3-1-1-4_1380_8
first seen 2026-06-30 04:26 · last seen 2026-09-15 11:10 · JSON
Last 7 days (3 observations)
Distinct clients per day (last 30 days, peak 6/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 | 1380 |
| 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 |
|---|---|
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. | 21 |
t13d2913h1_723694b0fccc_5671b5df5029 | 14 |
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. | 10 |
t12d180700_4b22cbed5bed_2dae41c691ec | 7 |
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 154.0.1, firefox 155.0.1, +1 more.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
t13d201200_2b729b4bf6f3_e24568c0d440 | 3 |
t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d1717h2_5b57614c22b0_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 148.0.2, firefox 144.0.2, firefox 142.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d2812h2_257f3020b3a2_ef7df7f74e48 | 1 |
t13d1514h2_8daaf6152771_827b515c4f52 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn050000_2469c960a647_000000000000_000000000000 | 7 |
ge20nr16kokr_94fdc06e0694_000000000000_000000000000 | 6 |
ge11nr11kokr_835281d8e5d9_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, +23 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
ge20nr10enus_b3034183f430_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +21 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
ge20nr13enus_5907f7c6644a_000000000000_000000000000 | 3 |
ge20nn010000_379fadc6c8b7_000000000000_000000000000 | 2 |
po11nn07enke_7d361e250c48_000000000000_000000000000 | 2 |
ge20nr16arso_94fdc06e0694_000000000000_000000000000 | 2 |
ge11nn11kokr_835281d8e5d9_000000000000_000000000000 | 2 |
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. | 25 |
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. | 4 |
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 154.0, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
4:2097152|5177345|0|m,s,a,p | 1 |
2:0;4:2097152;5:16384;6:16384|5177345|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.13.4, rust-reqwest 0.12.28, rust-reqwest 0.13.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
4:2097152;5:16384;6:16384|5177345|0|m,s,a,p | 1 |
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. | 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, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +21 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:256|m,a,s,p | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
KR · South Korea | 18 |
US · United States | 8 |
AT · Austria | 6 |
JP · Japan | 5 |
RU · Russia | 4 |
GR · Greece | 3 |
SG · Singapore | 2 |
FR · France | 2 |
PL · Poland | 2 |
HU · Hungary | 2 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS17858 · LG POWERCOMM | 6 |
AS3786 · LG DACOM Corporation | 6 |
AS25255 · ==> TELE2 AUSTRIA <== | 6 |
AS9316 · DACOM-PUBNETPLUS | 6 |
AS63949 · Akamai Connected Cloud | 4 |
AS22473 · Salt Lake City Corporation | 4 |
AS201952 · LTD AtelRybinsk | 3 |
AS8280 · SYNAPSECOM TELECOMS S.A. | 3 |
AS21859 · Zenlayer Inc | 2 |
AS9009 · M247 Europe SRL | 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 | 2 |