TCP SYN (p0f)

4:112+16:0:1460:8192,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-21 07:50 · last seen 2026-09-10 14:07 · 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 TTL112+16
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
t12d860600_e18388e7f3a3_a1e9356827952
t13d131300_f57a46bbacb6_fb48f8b98a291
t12d650700_0dd215169a35_4446390ac2241

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn05enus_a1be516b8e6e_000000000000_0000000000002
ge11nr04engb_8ddaef5d77af_000000000000_0000000000001
ge11nn040000_8010dedf9a70_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/78.0.3904.108 Safari/537.362
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
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.361

Country

fingerprintco-occurrences
DE · Germany2
NL · Netherlands1
SG · Singapore1

Network (ASN)

fingerprintco-occurrences
AS14061 · DigitalOcean, LLC3
AS213438 · ColocaTel Inc.1