TCP SYN (p0f)

4:39+25:0:1420:65535,6:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-24 05:26 · last seen 2026-09-08 03:31 · 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

IP version4
Initial TTL39+25
Options length0
MSS1420
Window size65535
Window scale6
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_58ed7828516f8
t13d1515h1_8daaf6152771_de4a06bb82e34
t13d1515h1_8daaf6152771_0a20fe35d3a53

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.8
ge11nn13enus_9db22d02e17a_000000000000_0000000000004
ge11nn14enus_4a2973d235de_000000000000_0000000000003

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1420_615

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.361
Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/78.0.3904.108 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.47 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.192 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; ) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36 AOLShield/83.0.4103.01
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

Country

fingerprintco-occurrences
BR · Brazil9
IQ · Iraq4
PK · Pakistan1
KE · Kenya1

Network (ASN)

fingerprintco-occurrences
AS51020 · Al-Jazeera Al-Arabiya Company for Communication and Internet LTD3
AS271222 · SIAT TELECOM INTERNET DEDICADA LTDA3
AS28126 · BRISANET SERVICOS DE TELECOMUNICACOES S.A1
AS198589 · Al-Jazeera Al-Arabiya Company for Communication and Internet LTD1
AS267999 · Paulo A Bispo da Silva Inf . ME1
AS269423 · NETNOAR TELECOM1
AS9541 · Cyber Internet Services (Pvt) Ltd.1
AS15399 · Wananchi Group (Kenya) Limited1
AS262999 · IVI TECNOLOGIA E COMUNICAÇÃO LTDA1
AS263631 · Via Line1