TCP SYN (p0f)

4:111+17:0:1460:8192,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-07-26 03:29 · last seen 2026-09-14 16:57 · 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 TTL111+17
Options length0
MSS1460
Window size8192
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+,ecn
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
t13d131300_f57a46bbacb6_fb48f8b98a291
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
ge11nr04engb_8ddaef5d77af_000000000000_0000000000001
ge11nn06enus_c11ebffaa84b_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
8192_2-1-3-1-1-4_1460_82

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Safari/605.1.151

Country

fingerprintco-occurrences
NL · Netherlands1
UA · Ukraine1

Network (ASN)

fingerprintco-occurrences
AS213438 · ColocaTel Inc.1
AS206791 · Slobozhenyuk B.Y. PE1