TCP SYN (JA4T)

64240_2-1-3-1-1-4_1414_8

first seen 2026-08-27 17:45 · last seen 2026-09-14 03:06 · JSON

Last 7 days (54 observations)

Distinct clients per day (last 30 days, peak 26/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
MSS1414
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
t13d2012h1_2b729b4bf6f3_9e7b989ebec842
t13d2013h1_2b729b4bf6f3_e24568c0d44012
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.5
t13d2913h1_723694b0fccc_5671b5df50294

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.54
ge20nr16jajp_94fdc06e0694_000000000000_0000000000005
ge11nr11jajp_835281d8e5d9_000000000000_0000000000004

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, +43 more.The fingerprint page shows the full measured match list. More on the catalog.5

TCP SYN (p0f)

fingerprintco-occurrences
4:114+14:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok::010
4:115+13:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok::08
4:116+12:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok::08
4:110+18:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok::06
4:113+15:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok::06
4:112+16:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok::05
4:112+16:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:04
4:117+11:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok::04
4:114+14:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:03
4:107+21:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok::02

User-Agent

fingerprintco-occurrences
curl/8.8.030
curl/8.18.012
'Mozilla/5.07
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.365
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.11
Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.11
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.01
Mozilla/5.0 (Linux; Android 14; Pixel 8 Pro) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 12; Pixel 6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361

Country

fingerprintco-occurrences
JP · Japan63

Network (ASN)

fingerprintco-occurrences
AS2514 · NTT PC Communications, Inc.18
AS4713 · NTT DOCOMO BUSINESS,Inc.12
AS17676 · SoftBank Corp.7
AS10013 · FreeBit Co.,Ltd.7
AS10010 · TOKAI Communications Corporation6
AS4725 · SoftBank Corp.6
AS4685 · Asahi Net3
AS9595 · NTT-ME Corporation2
AS18126 · Chubu Telecommunications Company, Inc.1
AS2519 · ARTERIA Networks Corporation1