TCP SYN (p0f)

4:114+14:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-19 19:15 · last seen 2026-08-14 14:36 · JSON

Decomposed attributes

IP version4
Initial TTL114+14
Options length0
MSS1340
Window sizemtu*47
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
t12d080700_0df93f53a2f9_2dae41c691ec4
t12d860600_e18388e7f3a3_a1e9356827951

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06en00_827c3ac6a18a_000000000000_0000000000002
ge11nn05en00_e9a7986301bf_000000000000_0000000000001
ge11nn06enus_39052e5ba942_000000000000_0000000000001
he11nn030000_44b0325fbcb5_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-1-3-1-1-4_1340_83

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 6.1; WOW64) SkypeUriPreview Preview/0.5 skype-url-preview@microsoft.com3
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4240.193 Safari/537.361

Country

fingerprintco-occurrences
US · United States3
DE · Germany1
JP · Japan1

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation4
AS212238 · Datacamp Limited1