TCP SYN (p0f)

4:41+23:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 12:07 · last seen 2026-10-31 08:20 · JSON

Last 7 days (5 observations)

Distinct clients per day (last 30 days, peak 5/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
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
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog.224
t12d490600_730fb1b0ac6a_a1e93568279526
t12d130600_2d7513195f68_e51b7354d87f7
t12i130500_2d7513195f68_e51b7354d87f1
t13d191000_9dc949149365_e7c2852226511
t12d990700_a40d17a72bcb_4446390ac2241

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +39 more.The fingerprint page shows the full measured match list. More on the catalog.224
ge11nn07zhcn_ad6bb88d6320_000000000000_00000000000026
ge11nn040000_88d30a62b7ad_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.4
ge11nr040000_88d30a62b7ad_000000000000_0000000000004
ge11nn020000_3ed38b250d3d_000000000000_0000000000001
ge11nn030000_042112399351_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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.224

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_7250

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36224
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11) AppleWebKit/601.1.27 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/601.1.279
Dalvik/2.1.0 (Linux; U; Android 9.0; ZTE BA520 Build/MRA58K)8
Mozilla/5.0 (Linux; Android 11; M2004J15SC) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Mobile Safari/537.367
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.2623.112 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36 QIHU 360SE1
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.361
Mozilla/5.0 (Linux; Android 8.0; LON-AL00 Build/HUAWEILON-AL00; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/48.0.2564.116 Mobile Safari/537.36 T7/10.10 baiduboxapp/10.10.0.12 (Baidu; P1 8.0.0)1
Mozilla/4.0 (compatible; MSIE 6.0; Mac_PowerPC; en) Opera 9.241
Mozilla/5.0 (Linux; Android 7.1.2; vivo Y79 Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/57.0.2987.132 MQQBrowser/6.2 TBS/044033 Mobile Safari/537.36 MicroMessenger/6.6.6.1300(0x26060637) NetType/WIFI Language/zh_CN1

Country

fingerprintco-occurrences
CN · China251
US · United States7
HK · Hong Kong SAR China2

Network (ASN)

fingerprintco-occurrences
AS4811 · China Telecom (Group)177
AS135089 · China Telecom47
AS4134 · CHINANET BACKBONE12
AS58466 · CHINANET Guangdong province network10
AS45102 · Alibaba (US) Technology Co., Ltd.7
AS58519 · Cloud Computing Corporation4
AS137951 · ASLINE LIMITED2
AS4837 · CHINA UNICOM China169 Backbone1

TLS supported groups

fingerprintco-occurrences
0017,0019,0018,00169