TCP SYN (JA4T)
65535_2-4-8-1-3_1390_10
first seen 2026-07-20 09:25 · last seen 2026-10-28 12:24 · JSON
Last 7 days (10 observations)
Distinct clients per day (last 30 days, peak 9/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 | 1390 |
| 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 |
|---|---|
t13d4412h1_fd39b124ee10_58ed7828516f | 29 |
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. | 10 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 7 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 5 |
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. | 1 |
t13d4312h1_c7886603b240_b26ce05bbdd6 | 1 |
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, +28 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d1516h1_8daaf6152771_1a63afa7c478 | 1 |
HTTP request (JA4H)
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, +57 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
PK · Pakistan | 23 |
KE · Kenya | 10 |
MU · Mauritius | 4 |
BD · Bangladesh | 3 |
ET · Ethiopia | 3 |
BW · Botswana | 2 |
DE · Germany | 1 |
KR · South Korea | 1 |
FR · France | 1 |
ZA · South Africa | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS45669 · JPL /LDI IP TRANSIT | 14 |
AS33771 · Safaricom Limited | 10 |
AS59257 · CMPak Limited | 5 |
AS23889 · Mauritius Telecom Ltd | 4 |
AS56167 · PTML | 4 |
AS24757 · Ethio Telecom | 3 |
AS31404 · LYCATEL DISTRIBUTION UK LIMITED | 2 |
AS24432 · TM International Bangladesh Ltd.Internet service Provider,Gulshan-1,Dhaka-1212 | 2 |
AS37014 · Mascom Wireless Ltd | 2 |
AS327712 · Telecom Algeria | 1 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 10 |
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. | 1 |
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
0a0a,001d,0017,0018 | 1 |