TCP SYN (p0f)

4:54+10:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-21 00:22 · last seen 2026-09-15 06:46 · JSON

Last 7 days (15 observations)

Distinct clients per day (last 30 days, peak 16/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 TTL54+10
Options length0
MSS1460
Window size65535
Window scale6
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
t13d1515h1_8daaf6152771_de4a06bb82e336
t13d1515h1_8daaf6152771_0a20fe35d3a526
t13d4412h1_fd39b124ee10_58ed7828516f18
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.11
t13d2013h1_2b729b4bf6f3_e24568c0d4409
t13d3013h2_1d37bd780c83_8537cf56674e6
t13d6912h1_8b2139ff7677_4de21b5f1c9e5
t13d1516h1_8daaf6152771_1a63afa7c4785
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.3
t13d6912h2_8b2139ff7677_4de21b5f1c9e2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_00000000000048
ge11nn14enus_4a2973d235de_000000000000_00000000000019
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.18
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog.17
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.9
ge20nr13zhcn_e2ac93ffb364_000000000000_0000000000003
ge11nr14enus_c08d6b87bc36_000000000000_0000000000002
ge11nr14enus_00a897484ca3_000000000000_0000000000001
ge11nr15enus_12054ef22ec7_000000000000_0000000000001
ge11nr15enus_599524644fc6_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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.11
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.6
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.5
2:0;6:262144;4:2097152;1:65536|2031617|0|m,a,s,p2
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 26.5, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1460_6125

User-Agent

fingerprintco-occurrences
curl/8.5.011
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.369
curl/8.21.09
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.368
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.367
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.367
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.366
curl/8.14.16
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.366
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36 Edg/151.0.0.06

Country

fingerprintco-occurrences
US · United States53
UA · Ukraine25
CO · Colombia12
CA · Canada7
PE · Peru7
IN · India6
MX · Mexico5
PL · Poland3
VE · Venezuela3
RU · Russia2

Network (ASN)

fingerprintco-occurrences
AS14593 · Space Exploration Technologies Corporation15
AS10620 · Telmex Colombia S.A.12
AS6849 · JSC Ukrtelecom12
AS55256 · Netskope Inc8
AS209 · CenturyLink Communications, LLC7
AS12252 · America Movil Peru S.A.C.7
AS7992 · Cogeco Connexion Inc.6
AS6079 · RCN5
AS3737 · PenTeleData Inc.5
AS16223 · MAXNET TELECOM, LTD5