TCP SYN (JA4T)

8192_2-1-3-1-1-4_1440_8

first seen 2026-06-30 16:04 · last seen 2026-10-22 03:15 · JSON

Distinct clients per day (last 30 days, peak 2/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 window8192
Option kinds2-1-3-1-1-4
MSS1440
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
t13d4312h1_c7886603b240_b26ce05bbdd611
t13d251100_b78ed14e2fd0_ab7e3b40a6774
t12d4907h1_730fb1b0ac6a_8587f467d9ea4
t13d1812h1_85036bcba153_d41ae481755e3
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.2
t12d280800_bbd4f008d9b2_16bbda4055b21
t13d2913h1_723694b0fccc_5671b5df50291

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.11
ge11nn050000_0b4164a3b800_000000000000_0000000000004
ge11nr05en00_f3bb7aa45ec4_000000000000_0000000000004
po11nn070000_ba9cdd0f42e2_000000000000_0000000000003
ge20nr16thth_94fdc06e0694_000000000000_0000000000002
ge11nn040000_ae2590be4883_000000000000_0000000000001
ge11nr11soso_835281d8e5d9_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.2

TCP SYN (p0f)

fingerprintco-occurrences
4:116+12:0:1440:8192,8:mss,nop,ws,nop,nop,sok:df,id+:04
4:118+10:0:1440:8192,8:mss,nop,ws,nop,nop,sok:df,id+:04
6:112+16:0:1440:8192,8:mss,nop,ws,nop,nop,sok:ecn:03
4:109+19:0:1440:8192,8:mss,nop,ws,nop,nop,sok:df,id+:03
6:113+15:0:1440:8192,8:mss,nop,ws,nop,nop,sok:ecn:02
4:107+21:0:1440:8192,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:110+18:0:1440:8192,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
6:51+13:0:1440:8192,8:mss,nop,ws,nop,nop,sok:ecn:02
6:40+24:0:1440:8192,8:mss,nop,ws,nop,nop,sok::01
4:110+18:0:1440:8192,8:mss,nop,ws,nop,nop,sok:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.364
python-httpx/0.28.13
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.362
Mozilla/5.0 (Linux; Android 12; Pixel 6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
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/123.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)1

Country

fingerprintco-occurrences
TW · Taiwan11
US · United States6
SG · Singapore5
CO · Colombia2
IN · India1
BD · Bangladesh1

Network (ASN)

fingerprintco-occurrences
AS3462 · Data Communication Business Group11
AS14061 · DigitalOcean, LLC5
AS8075 · Microsoft Corporation4
AS63949 · Akamai Connected Cloud2
AS3816 · COLOMBIA TELECOMUNICACIONES S.A. ESP BIC2
AS55836 · Reliance Jio Infocomm Limited1
AS23956 · AmberIT Limited1

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.8