TCP SYN (p0f)

4:114+14:0:1412:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-06-22 11:08 · last seen 2026-09-08 10:35 · JSON

Distinct clients per day (last 30 days, peak 4/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 TTL114+14
Options length0
MSS1412
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.7
t13d2913h1_723694b0fccc_5671b5df50295
t13d1515h1_8daaf6152771_de4a06bb82e31
t13d1515h1_8daaf6152771_0a20fe35d3a51

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr11fifi_835281d8e5d9_000000000000_0000000000002
ge11nr11fifi_b350a6a7c155_000000000000_0000000000002
ge20nn11enus_fb6edf1abc6a_000000000000_0000000000001
ge11nn11enau_835281d8e5d9_000000000000_0000000000001
ge20nr16dadk_94fdc06e0694_000000000000_0000000000001
ge20nn16dadk_94fdc06e0694_000000000000_0000000000001
ge20nr16jajp_94fdc06e0694_000000000000_0000000000001
ge20nr16soso_94fdc06e0694_000000000000_0000000000001
ge20nr16zhsg_94fdc06e0694_000000000000_0000000000001
ge20nn16zhsg_94fdc06e0694_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.7

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1412_813

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Linux; Android 13; Pixel 6 Pro) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.363
Mozilla/5.0 (Linux; Android 14; Pixel 8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.0 (iPhone; CPU iPhone OS 18_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/150.0.0.0 Mobile/15E148 Safari/604.12
Mozilla/5.0 (iPhone; CPU iPhone OS 18_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Mobile/15E148 Safari/604.12
Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 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
BJ · Benin6
CO · Colombia2
MX · Mexico1
AR · Argentina1
BY · Belarus1
MA · Morocco1
EC · Ecuador1
TG · Togo1

Network (ASN)

fingerprintco-occurrences
AS328228 · SOCIETE BENINOISE D'INFRASTRUCTURES NUMERIQUES6
AS266698 · INSITEL S.A.S.2
AS42772 · Unitary enterprise A11
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM1
AS11664 · Techtel LMDS Comunicaciones Interactivas S.A.1
AS8151 · Uninet S.A. de C.V.1
AS36924 · GVA Cote d'Ivoire SAS1
AS27947 · Telconet S.A1