TCP SYN (p0f)

4:53+11:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 14:41 · last seen 2026-10-31 22:58 · JSON

Last 7 days (151 observations)

Distinct clients per day (last 30 days, peak 67/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 TTL53+11
Options length0
MSS1460
Window size65535
Window scale9
Options layoutmss,sok,ts,nop,ws
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_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, +28 more.The fingerprint page shows the full measured match list. More on the catalog.1715
t13d1518h2_8daaf6152771_4980c97edce0123
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.117
t13d171200_ab0a1bf427ad_ecd0401ec68b108
t12d130600_2d7513195f68_021165082e1c12
t13d1515h1_8daaf6152771_de4a06bb82e310
t13d1515h1_8daaf6152771_0a20fe35d3a57
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 154.0.8037.57, chrome 152.0.7977.64, +24 more.The fingerprint page shows the full measured match list. More on the catalog.4
t13d1712h1_ab0a1bf427ad_8e6e362c5eac3
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.3

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog.1736
ge20nr12enus_54b4638ab28b_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 152.0.7977.83, chrome 151.0.7922.137, +58 more.The fingerprint page shows the full measured match list. More on the catalog.164
ge11nn05enus_f3bb7aa45ec4_000000000000_000000000000108
ge20nn11enus_dbdd560af68b_000000000000_00000000000028
ge20nr13enus_0c2c1d640f3e_000000000000_00000000000023
ge11nn13enus_9db22d02e17a_000000000000_00000000000013
ge11nr040000_88d30a62b7ad_000000000000_00000000000012
ge11nn14enus_4a2973d235de_000000000000_0000000000004
ge20nr11enus_a6993ee631f1_000000000000_0000000000003
ge20nr10ruru_b3034183f430_000000000000_0000000000003

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, +57 more.The fingerprint page shows the full measured match list. More on the catalog.1757
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 152.0.7977.83, +81 more.The fingerprint page shows the full measured match list. More on the catalog.119
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, +26 more.The fingerprint page shows the full measured match list. More on the catalog.43
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 133.0.6943.16, chrome 156.0.8078.48, chrome 150.0.7871.128, +3 more.The fingerprint page shows the full measured match list. More on the catalog.35
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p5
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.5, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:22|m,p,a,s1
1:4096;2:0;4:32768;5:16384|12517377|5:0:0:22|m,p,a,s1
1:4096;2:0;4:32768;5:16384|12517377|7:0:0:22|m,p,a,s1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1460_92094

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.361711
Mozilla/5.0 (compatible; ElevenlabsCrawler/1.0; +https://elevenlabs.io/docs/bots)108
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.3680
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/155.0.0.0 Safari/537.3654
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.3652
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.3628
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/155.0.0.0 Safari/537.3617
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.3612
Mozilla/5.0 (iPhone; CPU iPhone OS 26_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/144.0.7559.95 Mobile/15E148 Safari/604.14
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; Shap-User/0.1.04

Country

fingerprintco-occurrences
US · United States2051
IL · Israel32
NL · Netherlands12
RU · Russia3
DE · Germany1
HK · Hong Kong SAR China1
FR · France1
PL · Poland1
IN · India1
EE · Estonia1

Network (ASN)

fingerprintco-occurrences
AS203020 · HostRoyale Technologies Pvt Ltd1402
AS207990 · HostRoyale Technologies Pvt Ltd248
AS20473 · The Constant Company, LLC174
AS398781 · OCULUS NETWORKS INC109
AS394192 · Fastly, Inc.95
AS54113 · Fastly, Inc.29
AS212238 · Datacamp Limited14
AS202425 · IP Volume inc12
AS396356 · Latitude.sh3
AS6079 · RCN3

TLS supported groups

fingerprintco-occurrences
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.163
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.108

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
q13d0312h3_55b375c5d22e_178839b6cec12