TCP SYN (p0f)

4:116+12:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-06-29 20:19 · last seen 2026-09-10 19:43 · JSON

Last 7 days (3 observations)

Distinct clients per day (last 30 days, peak 26/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 TTL116+12
Options length0
MSS1460
Window size65535
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.83
t13d2913h1_723694b0fccc_5671b5df502954
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.10
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +24 more.The fingerprint page shows the full measured match list. More on the catalog.8
t13d5911h1_a33745022dd6_1f22a2ca17c4 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 23.11.1.The fingerprint page shows the full measured match list. More on the catalog.6
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.3
t13d201100_2b729b4bf6f3_36bf25f296df2
t13d201200_2b729b4bf6f3_e24568c0d4402
t13d1515h1_8daaf6152771_0a20fe35d3a52
t13d1515h1_8daaf6152771_de4a06bb82e32

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr16kokr_94fdc06e0694_000000000000_0000000000009
ge20nr16eses_94fdc06e0694_000000000000_0000000000008
ge11nr11itch_835281d8e5d9_000000000000_0000000000007
ge20nr16dech_94fdc06e0694_000000000000_0000000000007
ge11nn07*000_131b6413da1e_000000000000_0000000000006
ge11nr11kokr_835281d8e5d9_000000000000_0000000000006
ge20nr16frch_94fdc06e0694_000000000000_0000000000006
ge20nr16enus_94fdc06e0694_000000000000_0000000000006
ge20nr12enus_54b4638ab28b_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, edge 151.0.4129.93, +36 more.The fingerprint page shows the full measured match list. More on the catalog.6
ge11nr11enus_835281d8e5d9_000000000000_0000000000004

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.81
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.11
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.8
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.3
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +21 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:256|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1460_8174

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Linux; Android 13; Pixel 7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.368
Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.07
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/604.17
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.366
Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.16
Mozilla/5.0 (Linux; Android 14; 23054RA19C) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.366
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.365
Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Mobile/15E148 Safari/604.15
Mozilla/5.0 (Linux; Android 15; SM-F946B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.365
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/604.15

Country

fingerprintco-occurrences
CH · Switzerland47
US · United States42
KR · South Korea22
ES · Spain15
IT · Italy7
FR · France6
IE · Ireland6
AT · Austria6
NL · Netherlands5
JP · Japan4

Network (ASN)

fingerprintco-occurrences
AS6730 · Sunrise GmbH27
AS3303 · Swisscom (Switzerland) Ltd20
AS4766 · Korea Telecom18
AS7922 · Comcast Cable Communications, LLC16
AS5650 · Verizon Business12
AS7018 · AT&T Enterprises, LLC8
AS14593 · Space Exploration Technologies Corporation7
AS15704 · XTRA TELECOM S.A.7
AS6830 · Liberty Global Europe Holding B.V.6
AS33915 · Vodafone Libertel B.V.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_653d80c3fe9d6