TCP SYN (JA4T)
64800_2-4-8-1-3_1440_7
first seen 2026-06-29 23:11 · last seen 2026-09-15 20:51 · JSON
Last 7 days (87 observations)
Distinct clients per day (last 30 days, peak 17/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 | 64800 |
|---|---|
| Option kinds | 2-4-8-1-3 |
| MSS | 1440 |
| 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 |
|---|---|
t13d301000_1d37bd780c83_3550537cd59b | 4832 |
t12d290700_fc2078a0b8c0_8c06664c3ac5 | 225 |
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 114 |
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. | 52 |
t13d1516h2_8daaf6152771_e5627efa2ab1 | 47 |
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. | 46 |
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog. | 44 |
t13d151000_8daaf6152771_18e8a06d9b2d | 43 |
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. | 42 |
t13d1812h1_85036bcba153_d41ae481755e | 29 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nr08enus_002f1ef91713_000000000000_000000000000 | 4832 |
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog. | 137 |
ge11nn040000_bfa5a9b89dd6_000000000000_000000000000 | 105 |
ge11nn05en00_61812dc1cc58_000000000000_000000000000 | 85 |
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, +22 more.The fingerprint page shows the full measured match list. More on the catalog. | 66 |
ge20nn12enus_60f823d07c94_000000000000_000000000000 | 63 |
ge20nn010000_379fadc6c8b7_000000000000_000000000000 | 59 |
ge11nr040000_e1d2031bdfea_000000000000_000000000000 | 54 |
ge20nn020000_b89ce445e0b3_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.0, go-net/http 1.26.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 49 |
ge11nn050000_be0d0b335e46_000000000000_000000000000 | 34 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog. | 125 |
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, +42 more.The fingerprint page shows the full measured match list. More on the catalog. | 118 |
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p | 81 |
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 32 |
1:4096;2:0;4:65535;5:16384;3:100;6:65536|16777216|0|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog. | 29 |
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, +58 more.The fingerprint page shows the full measured match list. More on the catalog. | 23 |
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:42|m,p,a,s | 22 |
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 18 |
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 17 |
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p | 16 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
FR · France | 5073 |
US · United States | 383 |
SE · Sweden | 234 |
FI · Finland | 122 |
NL · Netherlands | 78 |
DE · Germany | 39 |
JP · Japan | 19 |
GB · United Kingdom | 16 |
IN · India | 16 |
PL · Poland | 14 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS51167 · Contabo GmbH | 4856 |
AS16276 · OVH SAS | 239 |
AS214379 · South Park Networks LLC | 223 |
AS24940 · Hetzner Online GmbH | 144 |
AS7922 · Comcast Cable Communications, LLC | 67 |
AS63129 · AirRabbit, LLC | 54 |
AS14061 · DigitalOcean, LLC | 41 |
AS10439 · CariNet, Inc. | 36 |
AS63949 · Akamai Connected Cloud | 30 |
AS47583 · Hostinger International Limited | 28 |
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).