TCP SYN (p0f)

4:46+18:0:1360:65535,6:mss,nop,ws,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,sok,eol+1:id-:0

first seen 2026-09-04 08:08 · last seen 2026-09-04 08:08 · JSON

Decomposed attributes

IP version4
Initial TTL46+18
Options length0
MSS1360
Window size65535
Window scale6
Options layoutmss,nop,ws,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,sok,eol+1
Quirksid-
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
t13d2014h2_a09f3c656075_e42f34c56612 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.6.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn08ja00_b65a39d4559c_000000000000_0000000000001
ge20nr09ja00_5ad46a65401a_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;3:100;4:2097152;8:1;9:1|10420225|1:0:0:256|m,s,a,p1
2:0;3:100;4:2097152;8:1;9:1|10420225|0|m,s,a,p1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-1-1-1-1-1-1-1-1-1-1-4-0-0_1360_62

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3 Safari/605.1.152

Country

fingerprintco-occurrences
CN · China2

Network (ASN)

fingerprintco-occurrences
AS4134 · CHINANET BACKBONE2

Cross-transport links

TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).

fingerprintlinked observations
q13d0311h3_55b375c5d22e_f2a83c8e78ae1