TCP SYN (p0f)

4:117+11:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-14 00:24 · last seen 2026-09-08 15:37 · JSON

Distinct clients per day (last 30 days, peak 2/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 TTL117+11
Options length0
MSS1460
Window size62727
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
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.12
t13d1312h2_f57a46bbacb6_ab7e3b40a677 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, +5 more.The fingerprint page shows the full measured match list. More on the catalog.5
t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28.The fingerprint page shows the full measured match list. More on the catalog.5
t13d491100_834380eab35e_d41ae481755e4
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.3
t13i130900_f57a46bbacb6_e7c2852226513
t13d3514h1_bfa337485184_678a800b22213
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.2
t13d1413h1_c3e714f39e98_b84688abd4642
t13d450900_d524c25c267f_9da38b6fd1bc2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_cd680697de12_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.5, powershell 7.6.4, go-net/http 1.27.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.11
ge20nn030000_80b089f68b8e_000000000000_0000000000005
ge20nn020000_fb4f949fd323_000000000000_0000000000004
he11nr07enus_313799b1302d_000000000000_0000000000003
ge11nr07enus_313799b1302d_000000000000_0000000000003
ge11nn040000_50034e570378_000000000000_0000000000003
ge20nr13enus_54728652be35_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, edge 149.0.4022.52, +10 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge11nn050000_9766b4b0354c_000000000000_0000000000002
ge11nn040000_b47458f13025_000000000000_0000000000002
ge20nn030000_b74f9ffb1cea_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:2097152;5:16384;6:16384|5177345|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.13.4, rust-reqwest 0.12.28, rust-reqwest 0.13.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog.5
2:0;4:4194304;5:16384;6:1048896|1073741824|0|a,m,p,s3
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.3
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.2
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.1
2:0;4:4194304;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
62727_2-4-8-1-3_1460_738

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.366
RecordedFuture Global Inventory Crawler5
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)5
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/142.0.0.0 Safari/537.363
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Bluesky Cardyb/1.1; +mailto:support@bsky.app) Chrome/W.X.Y.Z Safari/537.363
Mozilla/5.0 (compatible; getdomaindata/1.0; +https://getdomaindata.com/bot)3
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/600.2.5 (KHTML, like Gecko) Version/8.0.2 Safari/600.2.5 (Gort)2
Mozilla/5.0 (compatible; FacebookExternalHit/1.1; +http://www.facebook.com/externalhit_uatext.php)2
Mozilla/5.0 (compatible; wpbot/1.4; +https://forms.gle/ajBaxygz9jSR8p8G9)1
Go-http-client/1.11

Country

fingerprintco-occurrences
US · United States46

Network (ASN)

fingerprintco-occurrences
AS14618 · Amazon.com, Inc.31
AS16509 · Amazon.com, Inc.15