TCP SYN (p0f)

4:34+30:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-18 02:48 · last seen 2026-10-30 13:15 · JSON

Last 7 days (9 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 TTL34+30
Options length0
MSS1460
Window sizemss*20
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
t12d490600_730fb1b0ac6a_a1e93568279512
t12d4906h1_730fb1b0ac6a_22a92d800fe49

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn07zhcn_ad6bb88d6320_000000000000_00000000000021

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_721

User-Agent

fingerprintco-occurrences
Dalvik/2.1.0 (Linux; U; Android 9.0; ZTE BA520 Build/MRA58K)9
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11) AppleWebKit/601.1.27 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/601.1.278
Mozilla/5.0 (Linux; Android 6.0.1; vivo X9 Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/57.0.2987.132 MQQBrowser/6.2 TBS/044205 Mobile Safari/537.36 MicroMessenger/6.7.2.1340(0x26070236) NetType/4G Language/en1
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.8 (KHTML, like Gecko) Chrome/17.0.940.0 Safari/535.81
Mozilla/5.0 (X11; U; Linux x86_64; pl-PL; rv:2.0) Gecko/20110307 Firefox/4.01
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.8) Gecko/20051201 Firefox/1.51

Country

fingerprintco-occurrences
CN · China21

Network (ASN)

fingerprintco-occurrences
AS58461 · CT HangZhou IDC21

TLS supported groups

fingerprintco-occurrences
0017,0019,0018,001615