TCP SYN (p0f)

4:48+16:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 12:08 · last seen 2026-09-13 23:21 · 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 TTL48+16
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_e51b7354d87f3
t13d141000_cbb2034c60b8_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.22.12.The fingerprint page shows the full measured match list. More on the catalog.2
t13d3613h1_018971650b2c_e7e754ef087b1
t13d1515h1_8daaf6152771_0a20fe35d3a51
t13d361100_018971650b2c_e8b3fe21f08b1
t13d751100_479067518aa3_24695f2957a71
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.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_88d30a62b7ad_000000000000_0000000000002
ge11nr030000_cd680697de12_000000000000_0000000000002
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.1
ge11nn050000_70aac3314885_000000000000_0000000000001
he11nn030000_042112399351_000000000000_0000000000001
ge11nn14enus_b8b6b186c967_000000000000_0000000000001
ge11nn06en00_c8b5fb2f281e_000000000000_0000000000001
ge11nr040000_e1d2031bdfea_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_74

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Linux; Android 11; M2004J15SC) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Mobile Safari/537.363
FeedBot/1.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.361
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
US · United States5
NL · Netherlands3
JP · Japan1
FI · Finland1

Network (ASN)

fingerprintco-occurrences
AS45102 · Alibaba (US) Technology Co., Ltd.3
AS36352 · HostPapa2
AS41608 · NextGenWebs, S.L.1
AS24940 · Hetzner Online GmbH1
AS213438 · ColocaTel Inc.1
AS7684 · SAKURA Internet Inc.1
AS197170 · TechTies Inc.1