TCP SYN (p0f)

6:46+18:0:1360:65535,13:mss,sok,ts,nop,ws:flow:0

first seen 2026-08-22 10:51 · last seen 2026-09-16 11:15 · JSON

Last 7 days (4 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 version6
Initial TTL46+18
Options length0
MSS1360
Window size65535
Window scale13
Options layoutmss,sok,ts,nop,ws
Quirksflow
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
t13d2013h2_a09f3c656075_7f0f34a4126d Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.4, safari 26.6.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.4
t13d201200_2b729b4bf6f3_e24568c0d4401

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr09enus_5ad46a65401a_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.4, safari 26.6.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.2
po11nn07enus_7d361e250c48_000000000000_0000000000001
ge20nr08enus_1945e0741196_000000000000_0000000000001
ge20nn08enus_1945e0741196_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.4, safari 26.6.2.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog.4

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1360_135

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/27.0 Safari/605.1.154
Mozilla/5.0 (Windows NT 6.2; arm64) AppleWebKit/537.36 (KHTML, like Gecko) Opera/63.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
PL · Poland4
ZM · Zambia1

Network (ASN)

fingerprintco-occurrences
AS13335 · Cloudflare, Inc.5

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_f2a83c8e78ae2