TCP SYN (p0f)

4:41+23:0:1440:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-24 13:10 · last seen 2026-09-10 02:27 · 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

IP version4
Initial TTL41+23
Options length0
MSS1440
Window sizemss*44
Window scale7
Options layoutmss,sok,ts,nop,ws
Quirksdf,id+
Payload class0

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_58ed7828516f10
t13d1515h1_8daaf6152771_de4a06bb82e33
t13d521100_b262b3658495_8e6e362c5eac1
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.10
ge11nn13enus_9db22d02e17a_000000000000_0000000000004
ge11nn050000_2469c960a647_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1440_715

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.60 Safari/537.171
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3409.85 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil4
ZA · South Africa3
UZ · Uzbekistan2
PS · Palestinian Territories2
DE · Germany1
CO · Colombia1
VE · Venezuela1
PK · Pakistan1

Network (ASN)

fingerprintco-occurrences
AS57016 · Inform-Service TV Ltd.2
AS42013 · Together Communication LTD2
AS328622 · MHYAS HOLDINGS (PTY) LTD2
AS8075 · Microsoft Corporation1
AS18881 · TELEFÔNICA BRASIL S.A1
AS328471 · HERO TELECOMS (PTY) LTD1
AS9541 · Cyber Internet Services (Pvt) Ltd.1
AS264837 · CORPORACION VISUAL NUEVA ESPARTA, C.A1
AS265904 · D N VILELA TECNOLOGIA - ME1
AS273446 · DBR TELECOMUNICACOES LTDA1