TCP SYN (JA4T)
65535_2-4-8-1-3_1400_6
first seen 2026-07-05 00:26 · last seen 2026-11-02 20:13 · JSON
Last 7 days (383 observations)
Distinct clients per day (last 30 days, peak 180/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 | 2-4-8-1-3 |
| MSS | 1400 |
| Window scale | 6 |
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 |
|---|---|
t13d4312h1_c7886603b240_b26ce05bbdd6 | 1686 |
t13d4412h1_fd39b124ee10_58ed7828516f | 1597 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 1098 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 986 |
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, +29 more.The fingerprint page shows the full measured match list. More on the catalog. | 175 |
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. | 117 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 114 |
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. | 105 |
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. | 90 |
t13d1517h2_8daaf6152771_b1ff8ab2d16f | 22 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog. | 3283 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 1579 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 619 |
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, +40 more.The fingerprint page shows the full measured match list. More on the catalog. | 296 |
ge20nn12enus_60f823d07c94_000000000000_000000000000 | 44 |
ge20nr13enus_e2ac93ffb364_000000000000_000000000000 | 42 |
ge20nr13zhcn_e2ac93ffb364_000000000000_000000000000 | 23 |
ge20nn020000_b89ce445e0b3_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.1, go-net/http 1.27.3, +14 more.The fingerprint page shows the full measured match list. More on the catalog. | 12 |
ge20nn140000_02563f2d0fa8_000000000000_000000000000 | 12 |
ge11nr19engb_4e9b73ab7510_000000000000_000000000000 | 10 |
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, +61 more.The fingerprint page shows the full measured match list. More on the catalog. | 412 |
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 13 |
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p | 13 |
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 152.0.7977.83, +87 more.The fingerprint page shows the full measured match list. More on the catalog. | 6 |
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 26.6.2, safari 26.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 6 |
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. | 3 |
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144|15663105|3:0:0:256|m,a,s,p | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
IQ · Iraq | 882 |
BR · Brazil | 700 |
TR · Turkey | 442 |
SA · Saudi Arabia | 365 |
JO · Jordan | 296 |
TN · Tunisia | 289 |
OM · Oman | 203 |
MA · Morocco | 161 |
CL · Chile | 151 |
ZA · South Africa | 146 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS199739 · Earthlink Telecommunications Equipment Trading & Services DMCC | 369 |
AS203214 · Hulum Almustakbal Company for Communication Engineering and Services Ltd | 229 |
AS48832 · Jordanian mobile phone services Ltd | 177 |
AS28885 · OmanTel NAP | 175 |
AS43766 · Mobile Telecommunication Company Saudi Arabia Joint-Stock company | 163 |
AS37705 · TOPNET | 149 |
AS39891 · Saudi Telecom Company JSC | 129 |
AS37105 · RAIN GROUP HOLDINGS (PTY) LTD | 114 |
AS27901 · Pacifico Cable SPA. | 112 |
AS24757 · Ethio Telecom | 111 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 1019 |
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +13 more.The fingerprint page shows the full measured match list. More on the catalog. | 154 |
0a0a,001d,0017,0018 | 135 |
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 159.0, firefox 157.0, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 90 |
0a0a,6399,001d,0017,0018 | 18 |
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |