TCP SYN (p0f)

4:109+19:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-16 19:28 · last seen 2026-10-31 11:38 · 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 TTL109+19
Options length0
MSS1460
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+,ecn
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
t12d210700_76e208dd3e22_f28add8e7af02
t13d3112h1_e8f1e7e78f70_24695f2957a72
t13d251100_b78ed14e2fd0_ab7e3b40a6771
t13d1812h1_85036bcba153_b26ce05bbdd61
t13d191000_9dc949149365_e7c2852226511
t13d3112h1_e8f1e7e78f70_8d633dac7124 Match?Exact match in Thumbprint's published controlled catalog captures: curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06zhcn_90b9989cdd5a_000000000000_0000000000002
ge11nn15enus_27dc620a73a8_000000000000_0000000000002
ge11nn040000_608e01151bf4_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn010000_4a823118b9ba_000000000000_0000000000001
ge11nr050000_57c5e92682a8_000000000000_0000000000001
ge11nr08enus_33cbba219825_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1460_87

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.362
Mozilla/5.0 (Linux; U; Android 12; zh-Hans-CN; JAD-AL50 Build/HUAWEIJAD-AL50) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/100.0.4896.58 Quark/7.6.5.720 Mobile Safari/537.362
Mozlila/5.0 (Linux; Android 7.0; SM-G892A Bulid/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.107 Moblie Safari/537.361
Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.9 Mobile/15E148 Safari/604.11

Country

fingerprintco-occurrences
FR · France3
DE · Germany2
CN · China2
HK · Hong Kong SAR China1

Network (ASN)

fingerprintco-occurrences
AS16276 · OVH SAS3
AS37963 · Hangzhou Alibaba Advertising Co.,Ltd.2
AS401626 · Netiface America, Inc.2
AS153656 · OWGELS INTERNATIONAL CO., LIMITED1

TLS supported groups

fingerprintco-occurrences
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.2
001d,0017,001e,0019,00181
11ec,11eb,11ed,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.27.3, go-net/http 1.26.10.The fingerprint page shows the full measured match list. More on the catalog.1