TCP SYN (p0f)

4:47+17:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 04:20 · last seen 2026-09-16 12:33 · JSON

Last 7 days (176 observations)

Distinct clients per day (last 30 days, peak 38/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 TTL47+17
Options length0
MSS1460
Window sizemss*44
Window scale7
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
t13d301000_1d37bd780c83_3550537cd59b422
t13d491200_bd868743f55c_7c76daad20ec301
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.185
t13d4412h1_fd39b124ee10_58ed7828516f73
t13i190800_9dc949149365_97f8aa674fd971
t13i300900_3c43a67630b3_e7c28522265159
t13d1515h1_8daaf6152771_0a20fe35d3a558
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.56
t13d1515h1_8daaf6152771_de4a06bb82e333
t13d1011h1_61a7ad8aa9b6_3a8073edd8ef30

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr08enus_002f1ef91713_000000000000_000000000000422
ge11nn050000_dc01eb6f2852_000000000000_000000000000300
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, +23 more.The fingerprint page shows the full measured match list. More on the catalog.119
ge11nr040000_e1d2031bdfea_000000000000_000000000000105
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.73
ge11nr050000_3658ef221638_000000000000_00000000000064
ge11nn13enus_9db22d02e17a_000000000000_00000000000059
ge20nn11enus_dbdd560af68b_000000000000_00000000000044
ge11nn14enus_4a2973d235de_000000000000_00000000000033
ge20nr13ruru_5907f7c6644a_000000000000_00000000000027

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.141
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.64
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p26
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.13
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
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 150.0.7871.128, chromium 148.0.7778.96, +2 more.The fingerprint page shows the full measured match list. More on the catalog.9
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.6
3:100;4:33554432;2:0|33488897|0|m,p,s,a Match?Exact match in Thumbprint's published controlled catalog captures: php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.4
3:100;4:1073741824;2:0|1073676289|0|m,p,s,a3
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:256|m,a,s,p3

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_71468

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36423
Mozilla/5.0 (compatible; SERankingBacklinksBot/1.0; +https://seranking.com/backlinks-crawler)300
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36118
Mozilla/5.0 (compatible; InternetMeasurement/1.0; +https://internet-measurement.com/)67
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.3648
Mozilla/5.0 (compatible; ModatScanner/1.2; +https://modat.io/)45
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.3643
Mozilla/5.0 (compatible; Odin; https://docs.getodin.com/)26
Go-http-client/1.122
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36 ModatScanner/1.2 (+https://modat.io/)21

Country

fingerprintco-occurrences
FR · France504
DE · Germany369
US · United States153
GB · United Kingdom121
NL · Netherlands101
CA · Canada54
CO · Colombia32
CL · Chile25
RO · Romania20
ID · Indonesia16

Network (ASN)

fingerprintco-occurrences
AS51167 · Contabo GmbH423
AS24940 · Hetzner Online GmbH303
AS211298 · Driftnet Ltd67
AS209334 · Modat B.V.66
AS14061 · DigitalOcean, LLC56
AS50673 · Serverius48
AS36352 · HostPapa46
AS9009 · M247 Europe SRL42
AS401152 · Ace Data Centers II, L.L.C.30
AS12876 · Scaleway SAS24