TCP SYN (p0f)

4:51+13:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 04:12 · last seen 2026-09-05 21:47 · JSON

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 TTL51+13
Options length0
MSS1424
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
t13d190900_9dc949149365_97f8aa674fd9269
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.261
t13d131100_f57a46bbacb6_e5728521abd439

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn10zhcn_9c0cf7475f83_000000000000_000000000000309
ge11nn10zhcn_986c3fb09fa9_000000000000_000000000000110
ge11nr10zhcn_9c0cf7475f83_000000000000_00000000000083
ge11nn08zhcn_bd35aedc6348_000000000000_00000000000027
ge11nr08zhcn_bd35aedc6348_000000000000_00000000000023
ge11nr10zhcn_986c3fb09fa9_000000000000_00000000000017

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1424_7381

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1569

Country

fingerprintco-occurrences
US · United States304
HK · Hong Kong SAR China265

Network (ASN)

fingerprintco-occurrences
AS132203 · Tencent Building, Kejizhongyi Avenue569