TCP SYN (JA4T)

59640_2-1-3-4-8_1420_8

first seen 2026-07-01 18:46 · last seen 2026-10-30 18:14 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 1/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 window59640
Option kinds2-1-3-4-8
MSS1420
Window scale8

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
t13d1613h2_86a278354501_748f4c70de1c7
t13d4312h1_c7886603b240_b26ce05bbdd66
t13d1614h2_86a278354501_3dd24b5ebec41
t13d1515h1_8daaf6152771_de4a06bb82e31
t13d171000_5b57614c22b0_78e6aca7449b1

HTTP request (JA4H)

fingerprintco-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.6
ge20nr11enus_187a9385d229_000000000000_0000000000004
ge20nr11frfr_187a9385d229_000000000000_0000000000003
ge11nn13enus_9db22d02e17a_000000000000_0000000000001
ge11nn050000_b5e847c80b4c_000000000000_0000000000001
ge20nn11enus_684b26f0fcdf_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:22|m,p,a,s5
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:42|m,p,a,s1
1:4096;2:0;4:32768;5:16384|12517377|5:0:0:22|m,p,a,s1
1:4096;2:0;4:32768;5:16384|12517377|7:0:0:22|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
4:241+14:0:1420:mss*42,8:mss,nop,ws,sok,ts:df,id+:05
4:243+12:0:1420:mss*42,8:mss,nop,ws,sok,ts:df,id+:04
4:242+13:0:1420:mss*42,8:mss,nop,ws,sok,ts:df,id+:03
4:240+15:0:1420:mss*42,8:mss,nop,ws,sok,ts:df,id+:01
6:48+16:0:1420:mss*42,8:mss,nop,ws,sok,ts::01
6:49+15:0:1420:mss*42,8:mss,nop,ws,sok,ts::01
6:46+18:0:1420:mss*42,8:mss,nop,ws,sok,ts::01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Android 11; Mobile; rv:152.0) Gecko/152.0 Firefox/152.05
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.363
Mozilla/5.0 (Android 16; Mobile; rv:152.0) Gecko/152.0 Firefox/152.02
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.361
Mozilla/5.0 (Android 16; Mobile; rv:153.0) Gecko/153.0 Firefox/153.01

Country

fingerprintco-occurrences
FR · France16

Network (ASN)

fingerprintco-occurrences
AS15557 · Societe Francaise Du Radiotelephone - SFR SA16

TLS supported groups

fingerprintco-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.3

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).

fingerprintlinked observations
q13d0315h3_55b375c5d22e_dc5437974b473