TCP SYN (p0f)

4:47+17:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-27 18:04 · last seen 2026-08-22 04:53 · 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 TTL47+17
Options length0
MSS1460
Window sizemss*29
Window scale9
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
t13d191000_9dc949149365_e7c28522265117
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.2
t13d301000_1d37bd780c83_3550537cd59b1
t13d311200_1d947a95fc68_7e1102d2036b1
t13d1714h1_5b57614c22b0_43ade6aba3df1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn05zh00_4ee89fec50ea_000000000000_00000000000010
ge11nn05zh00_ddc401472a00_000000000000_0000000000005
ge11nr06enus_a89d28968959_000000000000_0000000000002
ge11nn050000_b9f979e9b0b7_000000000000_0000000000002
ge11nr05en00_978ba9f30f5e_000000000000_0000000000001
ge11nn06enus_829a35c9de3b_000000000000_0000000000001
ge11nn08enus_0e9bd3873e9d_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_920

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Linux; Android 11; vivo 1906; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/87.0.4280.141 Mobile Safari/537.36 VivoBrowser/8.9.0.07
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.365
curl/7.4.05
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Mobile/15E148 Safari/604.11
Protopage/3.0 (http://www.protopage.com)1

Country

fingerprintco-occurrences
CN · China17
NL · Netherlands2
HK · Hong Kong SAR China2
CA · Canada1

Network (ASN)

fingerprintco-occurrences
AS4134 · CHINANET BACKBONE17
AS211443 · SINO WORLDWIDE TRADING LIMITED2
AS16276 · OVH SAS1
AS138997 · Eons Data Communications Limited1
AS23764 · CTGNet1