TCP SYN (p0f)

4:118+10:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-08-27 13:06 · last seen 2026-09-05 13:07 · JSON

Distinct clients per day (last 30 days, peak 3/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 TTL118+10
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
t13d2913h1_723694b0fccc_5671b5df50298
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog.4
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.2
t13d1515h1_8daaf6152771_0a20fe35d3a51
t12d210700_76e208dd3e22_2dae41c691ec1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr11bgbg_835281d8e5d9_000000000000_0000000000003
ge11nn11bgbg_835281d8e5d9_000000000000_0000000000002
ge20nr16deat_94fdc06e0694_000000000000_0000000000001
ge11nr11deat_835281d8e5d9_000000000000_0000000000001
ge20nr13enus_9e2b86631664_000000000000_0000000000001
ge11nr11enie_b350a6a7c155_000000000000_0000000000001
ge11nr11enie_835281d8e5d9_000000000000_0000000000001
ge20nr16bgbg_94fdc06e0694_000000000000_0000000000001
ge20nn13eses_9e2b86631664_000000000000_0000000000001
ge20nr13eses_9e2b86631664_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.4
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.2

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1460_816

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Android 14; Mobile; rv:153.0) Gecko/153.0 Firefox/153.04
Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.13
Mozilla/5.0 (iPhone; CPU iPhone OS 16_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Mobile/15E148 Safari/604.12
Mozilla/5.0 (iPad; CPU OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.12
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361
Mozilla/5.0 (Linux; Android 14; Pixel 8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 12; SM-G991B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 17_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3 Mobile/15E148 Safari/604.11

Country

fingerprintco-occurrences
BG · Bulgaria6
AT · Austria3
US · United States2
ES · Spain2
VE · Venezuela2
UA · Ukraine1

Network (ASN)

fingerprintco-occurrences
AS39246 · Liulin Net Ltd.6
AS12605 · LIWEST Kabelmedien GmbH3
AS264628 · CORPORACION FIBEX TELECOM, C.A.2
AS12338 · Euskaltel S.A.2
AS36352 · HostPapa1
AS209 · CenturyLink Communications, LLC1
AS16223 · MAXNET TELECOM, LTD1