TCP SYN (p0f)

4:53+11:0:1460:mss*20,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-17 10:16 · last seen 2026-10-28 23:56 · 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 TTL53+11
Options length0
MSS1460
Window sizemss*20
Window scale10
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
t13d311000_e8f1e7e78f70_518fb456ca591
t13d311200_1d947a95fc68_7e1102d2036b Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 17.0.19.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr12enus_25d14dfbfd78_000000000000_0000000000001
ge11nn040000_487c3246ac94_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_101

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 Edg/145.0.0.01
Mozilla/5.0 (compatible; KakaoBot/1.0; +https://cs.kakao.com/helps_html/1073213012)1

Country

fingerprintco-occurrences
DE · Germany1
KR · South Korea1

Network (ASN)

fingerprintco-occurrences
AS61317 · Hivelocity LLC1
AS18160 · Kakao Corp1

TLS supported groups

fingerprintco-occurrences
001d,0017,0018,0019,001e,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: java-httpclient 17.0.19, java-httpclient 11.0.31.The fingerprint page shows the full measured match list. More on the catalog.1