TCP SYN (JA4T)

64240_2-1-3-1-1-4_1309_8

first seen 2026-08-28 12:51 · last seen 2026-10-24 19:48 · 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 window64240
Option kinds2-1-3-1-1-4
MSS1309
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
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.8
t13d2913h1_723694b0fccc_5671b5df50296
t13d4312h1_c7886603b240_b26ce05bbdd62

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr16jajp_94fdc06e0694_000000000000_0000000000005
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.2
ge11nr11jajp_835281d8e5d9_000000000000_0000000000002
ge11nr11jajp_b350a6a7c155_000000000000_0000000000002
ge11nr11kokr_835281d8e5d9_000000000000_0000000000001
ge20nr16enus_94fdc06e0694_000000000000_0000000000001
ge20nr16soso_94fdc06e0694_000000000000_0000000000001
ge11nn11kokr_835281d8e5d9_000000000000_0000000000001
ge20nn16jajp_94fdc06e0694_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-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.8

TCP SYN (p0f)

fingerprintco-occurrences
4:116+12:0:1309:mss*44,8:mss,nop,ws,nop,nop,sok::03
4:106+22:0:1309:mss*44,8:mss,nop,ws,nop,nop,sok::02
4:108+20:0:1309:mss*44,8:mss,nop,ws,nop,nop,sok:ecn:02
4:114+14:0:1309:mss*44,8:mss,nop,ws,nop,nop,sok::02
4:108+20:0:1309:mss*44,8:mss,nop,ws,nop,nop,sok::01
4:103+25:0:1309:mss*44,8:mss,nop,ws,nop,nop,sok::01
4:112+16:0:1309:mss*44,8:mss,nop,ws,nop,nop,sok::01
4:113+15:0:1309:mss*44,8:mss,nop,ws,nop,nop,sok::01
4:107+21:0:1309:mss*44,8:mss,nop,ws,nop,nop,sok:ecn:01
4:109+19:0:1309:mss*44,8:mss,nop,ws,nop,nop,sok::01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (iPhone; CPU iPhone OS 17_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1 Mobile/15E148 Safari/604.14
Mozilla/5.0 (Linux; Android 13; SM-A546B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.363
Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/153.0 Mobile/15E148 Safari/604.12
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 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 (Linux; Android 14; Pixel 9) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 13; 2211133C) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 14; SM-S926B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 12; SM-G991B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 13; Pixel 6 Pro) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361

Country

fingerprintco-occurrences
JP · Japan10
KR · South Korea4
US · United States2

Network (ASN)

fingerprintco-occurrences
AS4766 · Korea Telecom4
AS2516 · KDDI CORPORATION3
AS10010 · TOKAI Communications Corporation3
AS9824 · JCOM Co., Ltd.3
AS20115 · Charter Communications LLC1
AS2527 · Sony Network Communications Inc.1
AS20412 · Clarity Telecom LLC1

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.2