TCP SYN (p0f)

4:105+23:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-06-19 03:13 · last seen 2026-08-31 07:28 · JSON

Distinct clients per day (last 30 days, peak 2/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 version4
Initial TTL105+23
Options length0
MSS1460
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
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
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.10
t13d2913h1_723694b0fccc_5671b5df50293
t12d210700_76e208dd3e22_2dae41c691ec1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr16kokr_94fdc06e0694_000000000000_0000000000002
ge20nr16nbno_94fdc06e0694_000000000000_0000000000002
ge11nn040000_cf1edba2959c_000000000000_0000000000001
ge20nr13enus_5907f7c6644a_000000000000_0000000000001
ge20nn14enus_9c5aa737a9ec_000000000000_0000000000001
ge20nr12ennz_54b4638ab28b_000000000000_0000000000001
ge20nr16zhsg_94fdc06e0694_000000000000_0000000000001
ge11nn11zhsg_835281d8e5d9_000000000000_0000000000001
ge20nr16dadk_94fdc06e0694_000000000000_0000000000001
ge11nr11enau_835281d8e5d9_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +43 more.The fingerprint page shows the full measured match list. More on the catalog.8
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1460_813

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 Edg/149.0.0.02
Mozilla/5.0 (Linux; Android 12; SM-S901B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.0 (Linux; Android 13; SM-S911B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 17_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1 Mobile/15E148 Safari/604.11
Mozilla/5.0 (iPhone; CPU iPhone OS 16_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.7 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Linux; Android 13; SM-A546B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 14; 23127PN0CC) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 17_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Mobile/15E148 Safari/604.11

Country

fingerprintco-occurrences
SG · Singapore3
KR · South Korea3
NO · Norway2
AR · Argentina2
GH · Ghana2
NZ · New Zealand1
DK · Denmark1

Network (ASN)

fingerprintco-occurrences
AS14593 · Space Exploration Technologies Corporation2
AS9506 · Singtel Fibre Broadband2
AS3786 · LG DACOM Corporation2
AS2116 · GlobalConnect AS21162
AS14061 · DigitalOcean, LLC1
AS55850 · Mercury NZ Limited1
AS17858 · LG POWERCOMM1
AS7303 · Telecom Argentina S.A.1
AS27747 · Telecentro S.A.1
AS39642 · Sinal A/S1

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_653d80c3fe9d1