TCP SYN (JA4T)

65535_2-1-3-1-1-4-1-1-8_1400_8

first seen 2026-07-23 19:13 · last seen 2026-09-04 16:21 · JSON

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 window65535
Option kinds2-1-3-1-1-4-1-1-8
MSS1400
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
t13d4412h1_fd39b124ee10_58ed7828516f2
t13d1515h1_8daaf6152771_de4a06bb82e31
t13d1516h1_8daaf6152771_1a63afa7c4781

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.2
ge11nn13enus_9db22d02e17a_000000000000_0000000000002

TCP SYN (p0f)

fingerprintco-occurrences
4:47+17:0:1400:65535,8:mss,nop,ws,nop,nop,sok,nop,nop,ts::01
4:42+22:0:1400:65535,8:mss,nop,ws,nop,nop,sok,nop,nop,ts::01
4:39+25:0:1400:65535,8:mss,nop,ws,nop,nop,sok,nop,nop,ts::01
4:43+21:0:1400:65535,8:mss,nop,ws,nop,nop,sok,nop,nop,ts::01

User-Agent

fingerprintco-occurrences
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/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.170 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.361

Country

fingerprintco-occurrences
NG · Nigeria2
IR · Iran1
SY · Syria1

Network (ASN)

fingerprintco-occurrences
AS29465 · MTN NIGERIA Communication limited2
AS48065 · Syriatel Mobile Telecom1
AS197207 · Mobile Communication Company of Iran PLC1