TCP SYN (p0f)

4:46+18:0:1420:65535,8:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-22 09:26 · last seen 2026-10-28 05:30 · 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 TTL46+18
Options length0
MSS1420
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_58ed7828516f9
t13d1515h1_8daaf6152771_0a20fe35d3a54
t13d1515h1_8daaf6152771_de4a06bb82e32
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.1

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.9
ge11nn13enus_9db22d02e17a_000000000000_0000000000003
ge11nn14enus_4a2973d235de_000000000000_0000000000003
ge11nr15dede_944d72baa157_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1420_816

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/537.363
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 (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 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/86.0.4240.99 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.361
Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.17 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.0 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_3) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/88.0.4324.96 Safari/537.361
Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.67 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil5
MX · Mexico2
KZ · Kazakhstan2
VN · Vietnam2
PE · Peru2
BD · Bangladesh1
PK · Pakistan1
IQ · Iraq1

Network (ASN)

fingerprintco-occurrences
AS28548 · Cablevisión, S.A. de C.V.2
AS21299 · Kar-Tel LLC2
AS270068 · DESARROLLO DE INFRAESTRUCTURA DE TELECOMUNICACIONES PERU S.A.C. (INFRATEL)2
AS7552 · Viettel Group1
AS45899 · VNPT Corp1
AS17557 · Pakistan Telecommunication Company Limited1
AS58689 · ICC Communication1
AS205800 · Steps Telecom For Internet Ltd.1
AS265455 · SKYNET TELECOM EIRELI1
AS265169 · MEGA TELECON PROVEDOR DE INTERNET LTDA ME1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog.1