TCP SYN (p0f)

4:47+17:0:1460:mss*44,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-03 18:49 · last seen 2026-09-14 14:07 · 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 TTL47+17
Options length0
MSS1460
Window sizemss*44
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
t13d1714h1_5b57614c22b0_43ade6aba3df5
t13d311100_e8f1e7e78f70_d41ae481755e Match?Exact match in Thumbprint's published controlled catalog captures: rust-hyper 1.11.0, rust-hyper 1.11.1, rust-hyper 1.10.1.The fingerprint page shows the full measured match list. More on the catalog.3
t12d430700_1ce71f0edbb1_269097225c9f2
t13d3013h2_1d37bd780c83_8537cf56674e2
t13d521100_b262b3658495_8e6e362c5eac1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn08enus_0e9bd3873e9d_000000000000_0000000000005
ge11nn040000_e1d2031bdfea_000000000000_0000000000003
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog.2
he11nn040000_5192a00d9159_000000000000_0000000000001
ge11nn05engl_2b07ea22e586_000000000000_0000000000001
ge11nn050000_2469c960a647_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_913

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/537.365
curl/8.18.02
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Mobile Safari/537.362
Java/1.8.0_3221
Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.5823.1639 Mobile Safari/537.361
Mozilla/5.0 (Windows NT 10.0; WOW64; Android) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.4636.89 Safari/537.36 HuaweiCrawler1
Mozilla/5.0 (compatible; GeniusDataBot/1.0; +https://geniusdata.com)1

Country

fingerprintco-occurrences
NL · Netherlands7
CN · China3
HK · Hong Kong SAR China2
DE · Germany1

Network (ASN)

fingerprintco-occurrences
AS197170 · TechTies Inc.7
AS4134 · CHINANET BACKBONE2
AS136907 · HUAWEI CLOUDS2
AS24940 · Hetzner Online GmbH1
AS137266 · CHINATELECOM Hubei province Wuhan 5G network1