TCP SYN (p0f)

4:46+18:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-17 21:27 · last seen 2026-10-31 13:48 · JSON

Last 7 days (40 observations)

Distinct clients per day (last 30 days, peak 8/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 TTL46+18
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
t13d131100_f57a46bbacb6_e5728521abd4474
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.143
t13d190900_9dc949149365_97f8aa674fd933
t13d311000_e8f1e7e78f70_5ac7197df9d223
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.9

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn10zhcn_9c0cf7475f83_000000000000_000000000000400
ge20nn15enus_a80081d13d36_000000000000_000000000000137
ge11nr10zhcn_9c0cf7475f83_000000000000_000000000000109
ge11nn05zhcn_65b616753dd4_000000000000_00000000000023
ge20nr14enus_4600588ae5ca_000000000000_0000000000006
ge11nr08zhcn_bd35aedc6348_000000000000_0000000000002
ge11nn10zhcn_986c3fb09fa9_000000000000_0000000000002
ge11nn030000_0db47b7d240d_000000000000_0000000000001
ge11nr10zhcn_986c3fb09fa9_000000000000_0000000000001
ge11nr040000_8391bea91fb6_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +57 more.The fingerprint page shows the full measured match list. More on the catalog.137
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 152.0.7977.83, +81 more.The fingerprint page shows the full measured match list. More on the catalog.6

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1424_7676

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/604.1514
Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)166
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/537.362

Country

fingerprintco-occurrences
SG · Singapore423
CN · China182
US · United States58
HK · Hong Kong SAR China9
KR · South Korea7
BR · Brazil3

Network (ASN)

fingerprintco-occurrences
AS132203 · Tencent Building, Kejizhongyi Avenue500
AS4837 · CHINA UNICOM China169 Backbone123
AS134756 · CHINANET Nanjing Jishan IDC network27
AS45090 · Shenzhen Tencent Computer Systems Company Limited16
AS146966 · China Telecom14
AS140293 · CHINATELECOM Jiangsu province Changzhou 5G network2

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.58
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.17