TCP SYN (JA4T)

65535_2-4-8-1-3_1376_6

first seen 2026-08-03 18:59 · last seen 2026-09-10 03:32 · JSON

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 7/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 window65535
Option kinds2-4-8-1-3
MSS1376
Window scale6

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)

fingerprintco-occurrences
t13d1515h1_8daaf6152771_de4a06bb82e314
t13d1515h1_8daaf6152771_0a20fe35d3a56
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
t13d3013h2_1d37bd780c83_8537cf56674e2
t13d1516h1_8daaf6152771_1a63afa7c4782

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_00000000000018
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.4
ge11nn14enus_4a2973d235de_000000000000_0000000000004

HTTP/2 frames (Akamai)

fingerprintco-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.2
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (p0f)

fingerprintco-occurrences
6:48+16:0:1376:65535,6:mss,sok,ts,nop,ws:flow:04
6:52+12:0:1376:65535,6:mss,sok,ts,nop,ws:flow:04
6:49+15:0:1376:65535,6:mss,sok,ts,nop,ws:flow:03
6:51+13:0:1376:65535,6:mss,sok,ts,nop,ws:flow:03
4:44+20:0:1376:65535,6:mss,sok,ts,nop,ws:id-:02
6:56+8:0:1376:65535,6:mss,sok,ts,nop,ws:flow:02
4:46+18:0:1376:65535,6:mss,sok,ts,nop,ws:id-:01
6:54+10:0:1376:65535,6:mss,sok,ts,nop,ws:flow:01
4:43+21:0:1376:65535,6:mss,sok,ts,nop,ws:id-:01
4:38+26:0:1376:65535,6:mss,sok,ts,nop,ws:id-:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.363
curl/8.14.12
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.362
curl/8.5.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
US · United States26

Network (ASN)

fingerprintco-occurrences
AS21928 · T-Mobile USA, Inc.26