TCP SYN (p0f)

4:118+10:0:1452:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-08-27 18:43 · last seen 2026-09-12 10:28 · JSON

Last 7 days (1 observations)

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 TTL118+10
Options length0
MSS1452
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
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
t13d2913h1_723694b0fccc_5671b5df50292
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.1
t13d521100_b262b3658495_8e6e362c5eac1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr11ruru_835281d8e5d9_000000000000_0000000000001
ge20nr16eses_94fdc06e0694_000000000000_0000000000001
ge20nn13dede_9e2b86631664_000000000000_0000000000001
ge20nr13dede_9e2b86631664_000000000000_0000000000001
ge20nr13eses_9e2b86631664_000000000000_0000000000001
ge20nn13eses_9e2b86631664_000000000000_0000000000001
ge11nr11nbno_835281d8e5d9_000000000000_0000000000001
ge11nn10ruru_170c1c30f240_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.1

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1452_88

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.02
Mozilla/5.0 (Android 14; Mobile; rv:153.0) Gecko/153.0 Firefox/153.02
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 (Linux; Android 13; Pixel 7) 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
Mozilla/5.0 (Linux; Android 12; MiTV-MSSP1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.280738838 Safari/537.361

Country

fingerprintco-occurrences
DE · Germany3
ES · Spain3
RU · Russia2

Network (ASN)

fingerprintco-occurrences
AS3320 · Deutsche Telekom AG3
AS12430 · VODAFONE ESPANA S.A.U.3
AS12389 · PJSC Rostelecom1
AS28812 · PJSC Bashinformsvyaz1