TCP SYN (p0f)

4:41+23:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 02:22 · last seen 2026-08-28 04:29 · 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 TTL41+23
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
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.26
t13d131100_f57a46bbacb6_e5728521abd424
t13d190900_9dc949149365_97f8aa674fd93

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn08zhcn_bd35aedc6348_000000000000_00000000000029
ge11nr08zhcn_bd35aedc6348_000000000000_00000000000022
ge11nr030000_0db47b7d240d_000000000000_0000000000001
ge11nr10zhcn_9c0cf7475f83_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1424_71

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/604.152
Mozilla/5.0 (Linux; Android 10; LIO-AN00 Build/HUAWEILIO-AN00; wv) MicroMessenger Weixin QQ AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.62 XWEB/2692 MMWEBSDK/200901 Mobile Safari/537.361

Country

fingerprintco-occurrences
JP · Japan18
SG · Singapore10
CN · China9
HK · Hong Kong SAR China8
KR · South Korea4
US · United States2
ID · Indonesia2

Network (ASN)

fingerprintco-occurrences
AS132203 · Tencent Building, Kejizhongyi Avenue44
AS45090 · Shenzhen Tencent Computer Systems Company Limited9