TCP SYN (p0f)

4:48+16:0:1440:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-20 10:33 · last seen 2026-09-13 16:14 · JSON

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 6/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 TTL48+16
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_58ed7828516f39
t13d1515h1_8daaf6152771_0a20fe35d3a510
t13d1515h1_8daaf6152771_de4a06bb82e310
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.3
t13d1516h1_8daaf6152771_1a63afa7c4782
t13d1712h1_ab0a1bf427ad_882d495ac3811
t13i190800_9dc949149365_97f8aa674fd91

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.39
ge11nn13enus_9db22d02e17a_000000000000_00000000000016
ge11nn14enus_4a2973d235de_000000000000_0000000000006
ge20nn050000_282098a6f928_000000000000_0000000000003
ge11nn07enus_6f5b1826d533_000000000000_0000000000001
ge11nr040000_e1d2031bdfea_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|0|m,a,s,p3

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1440_766

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.363
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 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/131.0.0.0 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 (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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.362

Country

fingerprintco-occurrences
CO · Colombia32
BR · Brazil17
US · United States5
CL · Chile5
IT · Italy2
BG · Bulgaria1
GB · United Kingdom1
UA · Ukraine1
AR · Argentina1
VE · Venezuela1

Network (ASN)

fingerprintco-occurrences
AS3816 · COLOMBIA TELECOMUNICACIONES S.A. ESP BIC30
AS8075 · Microsoft Corporation5
AS7418 · TELEFÓNICA CHILE S.A.4
AS1267 · WIND TRE S.P.A.1
AS52468 · UFINET PANAMA S.A.1
AS269000 · JG TELECOM COM. E SERVS. LTDA1
AS28182 · JUPITER PROVEDOR DE INTERNET LTDA1
AS52409 · COSEIDI S.A.1
AS28146 · MHNET TELECOM1
AS269300 · NETMITT IMP & MULTIMIDIA EIRELI1