TCP SYN (p0f)

4:49+15:0:1400:65535,8:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-20 12:56 · last seen 2026-09-09 16:51 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 4/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 TTL49+15
Options length0
MSS1400
Window size65535
Window scale8
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_58ed7828516f27
t13d1515h1_8daaf6152771_0a20fe35d3a514
t13d1515h1_8daaf6152771_de4a06bb82e38

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.27
ge11nn13enus_9db22d02e17a_000000000000_00000000000012
ge11nn14enus_4a2973d235de_000000000000_00000000000010

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1400_849

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.93 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
PK · Pakistan10
SY · Syria8
ET · Ethiopia5
MX · Mexico4
BR · Brazil3
NG · Nigeria3
IQ · Iraq3
DZ · Algeria2
SE · Sweden1
RU · Russia1

Network (ASN)

fingerprintco-occurrences
AS59257 · CMPak Limited7
AS29256 · STE PDN Internal AS7
AS24757 · Ethio Telecom5
AS17072 · TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.4
AS36873 · Airtel Networks Limited3
AS199739 · Earthlink Telecommunications Equipment Trading & Services DMCC2
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM1
AS9198 · JSC Kazakhtelecom1
AS3301 · Telia Company AB1
AS7552 · Viettel Group1