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 2026-09-10 15:41 · JSON

Last 7 days (1 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 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
t12d130600_2d7513195f68_e51b7354d87f7
t12d490600_730fb1b0ac6a_a1e9356827956
t13d191000_9dc949149365_e7c2852226511
t12i130500_2d7513195f68_e51b7354d87f1
t12d990700_a40d17a72bcb_4446390ac2241

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn07zhcn_ad6bb88d6320_000000000000_0000000000006
ge11nr040000_88d30a62b7ad_000000000000_0000000000004
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
ge11nn020000_3ed38b250d3d_000000000000_0000000000001
ge11nn030000_042112399351_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_76

User-Agent

fingerprintco-occurrences
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 (Macintosh; Intel Mac OS X 10_11) AppleWebKit/601.1.27 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/601.1.273
Dalvik/2.1.0 (Linux; U; Android 9.0; ZTE BA520 Build/MRA58K)2
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

Country

fingerprintco-occurrences
US · United States7
CN · China7
HK · Hong Kong SAR China2

Network (ASN)

fingerprintco-occurrences
AS45102 · Alibaba (US) Technology Co., Ltd.7
AS4811 · China Telecom (Group)6
AS137951 · ASLINE LIMITED2
AS4837 · CHINA UNICOM China169 Backbone1