TCP SYN (JA4T)
62727_2-4-8-1-3_1460_10
first seen 2026-06-30 01:44 · last seen 2026-09-14 20:50 · JSON
Last 7 days (12 observations)
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 | 62727 |
|---|---|
| Option kinds | 2-4-8-1-3 |
| MSS | 1460 |
| Window scale | 10 |
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. | 58 |
t13d101000_61a7ad8aa9b6_f9531d972513 | 29 |
t13d1114h2_5e2a75874763_89e9e4bb3419 | 18 |
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. | 9 |
t13d1517h2_8daaf6152771_dcad5a053991 | 7 |
t12d1515h2_8daaf6152771_98afadeeacd9 | 4 |
t13d131100_f57a46bbacb6_e5728521abd4 | 3 |
t13i1909h2_9dc949149365_97f8aa674fd9 | 3 |
t13d3112h1_e8f1e7e78f70_d41ae481755e | 2 |
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. | 2 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn030000_6176f80cf3c8_000000000000_000000000000 | 15 |
ge11nn040000_bcc68d1858ec_000000000000_000000000000 | 14 |
ge20nn020000_fb4f949fd323_000000000000_000000000000 | 10 |
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. | 9 |
ge20nr18enus_04359aac950f_000000000000_000000000000 | 9 |
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. | 8 |
ge20nn120000_1d5643f8516d_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 148.0.7778.96, chromium 147.0.7727.15, +12 more.The fingerprint page shows the full measured match list. More on the catalog. | 8 |
ge20nr09enus_755f4c16f575_000000000000_000000000000 | 4 |
ge20nr17ja00_a04fa3fe97ae_000000000000_000000000000 | 3 |
ge20nr100000_65cf54e683ea_000000000000_000000000000 | 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, +43 more.The fingerprint page shows the full measured match list. More on the catalog. | 25 |
4:16777216|16711681|0|m,p,a,s | 18 |
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. | 17 |
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p | 8 |
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. | 6 |
1:65536;3:1000;4:6291456;5:16384;6:262144|15663105|0|m,a,s,p | 4 |
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. | 4 |
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:220|m,a,s,p | 3 |
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 |
2:0;4:65535|67043329|0|m,s,a,p | 2 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 139 |
DE · Germany | 1 |
JP · Japan | 1 |
SE · Sweden | 1 |
IE · Ireland | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS14618 · Amazon.com, Inc. | 106 |
AS16509 · Amazon.com, Inc. | 37 |
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 | 16 |