TCP SYN (JA4T)
64800_2-4-8-1-3_1440_9
first seen 2026-06-30 04:14 · last seen 2026-09-14 12:19 · JSON
Last 7 days (1 observations)
Distinct clients per day (last 30 days, peak 2/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 | 9 |
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_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. | 10 |
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. | 3 |
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. | 2 |
t13d3013h1_1d37bd780c83_ecd0401ec68b | 2 |
t13d1517h2_8daaf6152771_dcad5a053991 | 2 |
t13d1312h2_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t13d4907h2_0d8feac7bc37_7395dae3b2f3 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t13d3112h1_e8f1e7e78f70_d41ae481755e | 1 |
t12d1515h2_8daaf6152771_4d8a99c1bc01 | 1 |
t13d521100_b262b3658495_8e6e362c5eac | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn04enus_39a3ba4480e8_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog. | 8 |
ge20nn04enus_8325a3ce5a12_000000000000_000000000000 | 2 |
ge20nr100000_65cf54e683ea_000000000000_000000000000 | 2 |
ge20nr09enus_755f4c16f575_000000000000_000000000000 | 2 |
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. | 2 |
ge20nn04enus_a1e84a948d10_000000000000_000000000000 | 1 |
ge20nn13zhcn_9519c2577190_000000000000_000000000000 | 1 |
ge20nn14zhcn_00c893c2b404_000000000000_000000000000 | 1 |
ge11nn050000_be0d0b335e46_000000000000_000000000000 | 1 |
ge11nn050000_dac78f95d824_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
2:0;4:4194304;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog. | 10 |
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. | 3 |
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
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. | 2 |
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:220|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|9:1:7:220|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;2602:1247144272|15663105|1:1:0:220|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;64250:3774865893|15663105|1:1:0:220|m,a,s,p | 1 |
1:65536;3:1000;4:6291456;5:16384;6:262144|15663105|0|m,a,s,p | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
UA · Ukraine | 10 |
FI · Finland | 4 |
HK · Hong Kong SAR China | 3 |
FR · France | 3 |
CN · China | 3 |
US · United States | 2 |
DE · Germany | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS43180 · Trunk Networks LTD | 10 |
AS24940 · Hetzner Online GmbH | 4 |
AS16276 · OVH SAS | 3 |
AS4134 · CHINANET BACKBONE | 3 |
AS153771 · Heptasky Hong Kong Limited | 3 |
AS7203 · Leaseweb USA, Inc. | 2 |
AS213520 · Senko Digital LLC | 1 |
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 |
|---|---|
q13d0312h3_55b375c5d22e_178839b6cec1 | 2 |