TCP SYN (p0f)

4:42+22:0:1412:mss*46,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-21 22:29 · last seen 2026-09-26 02:39 · JSON

Decomposed attributes

IP version4
Initial TTL42+22
Options length0
MSS1412
Window sizemss*46
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
t13d191000_9dc949149365_e7c2852226516
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_8391bea91fb6_000000000000_0000000000006
ge11nr05zhcn_813e32c09d15_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64952_2-4-8-1-3_1412_76

User-Agent

fingerprintco-occurrences
Go-http-client/1.13
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.01
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/594.47 (KHTML, like Gecko) Chrome/78.0.557 Safari/537.361
Mozilla/5.0 (Windows NT 8_0_1; Win64; x64) AppleWebKit/551.42 (KHTML, like Gecko) Chrome/81.0.2501 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/573.35 (KHTML, like Gecko) Chrome/103.0.608 Safari/537.361

Country

fingerprintco-occurrences
HK · Hong Kong SAR China4
CN · China3

Network (ASN)

fingerprintco-occurrences
AS135377 · UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED4
AS23724 · IDC, China Telecommunications Corporation3