TCP SYN (p0f)

6:52+12:0:1360:65535,13:mss,sok,ts,nop,ws:flow:0

first seen 2026-09-28 13:20 · last seen 2026-10-13 12:05 · JSON

Distinct clients per day (last 30 days, peak 7/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 version6
Initial TTL52+12
Options length0
MSS1360
Window size65535
Window scale13
Options layoutmss,sok,ts,nop,ws
Quirksflow
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
t13d3013h2_1d37bd780c83_8537cf56674e8
t13d1511h2_8daaf6152771_78e6aca7449b1
t13d2812h1_a01be8c064b6_0d46a1bf4a7c1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.8
ge20nr12engb_54b4638ab28b_000000000000_0000000000001
ge11nn070000_ed0ca6d606af_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.8
2:0;4:2097152;5:16384;6:16777216|5177345|0|m,s,a,p1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1360_1310

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 Chrome/120 Safari/537.367
Python-urllib/3.121
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 Chrome/124 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/155.0.0.0 Safari/537.36 Edg/155.0.0.01

Country

fingerprintco-occurrences
CN · China7
US · United States1
BR · Brazil1
GB · United Kingdom1

Network (ASN)

fingerprintco-occurrences
AS13335 · Cloudflare, Inc.10