TCP SYN (p0f)

4:54+10:0:1460:mss*29,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-04 07:18 · last seen 2026-10-24 20:27 · JSON

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 7/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 sizemss*29
Window scale10
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
t13d1011h1_61a7ad8aa9b6_3a8073edd8ef24
t13i1909h2_9dc949149365_97f8aa674fd923
t13d4312h1_c7886603b240_b26ce05bbdd69
t13d3013h2_1d37bd780c83_8537cf56674e7
t13d1515h1_8daaf6152771_de4a06bb82e31
t13d1313h2_f57a46bbacb6_9249cab70c771
t13d1716h2_5b57614c22b0_ca3c9f3127701

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr030000_80b089f68b8e_000000000000_00000000000013
ge11nn040000_8b1ed2202073_000000000000_00000000000013
ge11nr040000_8b1ed2202073_000000000000_00000000000011
ge20nr030000_ff50983941c1_000000000000_00000000000010
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.9
ge20nn030000_bf75ddd0bb29_000000000000_0000000000007
ge20nr020000_fb4f949fd323_000000000000_0000000000001
ge20nr10enus_b3034183f430_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +27 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn13enus_9db22d02e17a_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog.23
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, +8 more.The fingerprint page shows the full measured match list. More on the catalog.7
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +31 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_1066

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; CyberConvoyScout/1.0; +https://scout.cyberconvoy.co)23
curl/8.14.17
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.364
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.3; +https://openai.com/gptbot)3
Mozilla/5.0 (compatible; Applebot/0.1; +http://www.apple.com/go/applebot)2
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.362
Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)2
Mozilla/5.0 (compatible; OAI-SearchBot/1.3; +https://openai.com/searchbot)2
Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)2
CCBot/2.0 (https://commoncrawl.org/faq/)2

Country

fingerprintco-occurrences
NL · Netherlands24
US · United States20
FR · France15
JP · Japan2
SG · Singapore2
AU · Australia1
DE · Germany1
MX · Mexico1

Network (ASN)

fingerprintco-occurrences
AS20473 · The Constant Company, LLC31
AS41608 · NextGenWebs, S.L.24
AS6079 · RCN10
AS141995 · Contabo Asia Private Limited1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.9
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.7
001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog.3
6399,001d,0017,0018,00191