TCP SYN (p0f)

4:47+17:0:1276:mss*34,12:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-01 14:42 · last seen 2026-07-01 14:42 · JSON

Decomposed attributes

IP version4
Initial TTL47+17
Options length0
MSS1276
Window sizemss*34
Window scale12
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
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.19.0, node-fetch 22.23.1, node-fetch 24.21.0, +6 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn07enus_6c5989145a61_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
43384_2-4-8-1-3_1276_121

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; offlinerss/1.0; +https://github.com/cadamsdotcom/offlinerss)1

Country

fingerprintco-occurrences
NL · Netherlands1

Network (ASN)

fingerprintco-occurrences
AS400940 · Railway1