TCP SYN (p0f)

4:57+7:0:1420:mss*30,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-09-05 21:08 · last seen 2026-09-05 21:08 · JSON

Distinct clients per day (last 30 days, peak 1/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 TTL57+7
Options length0
MSS1420
Window sizemss*30
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
t13d131200_f57a46bbacb6_9249cab70c7713

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr05enus_f3bb7aa45ec4_000000000000_00000000000011
ge11nr030000_cd680697de12_000000000000_0000000000001
ge11nr060000_6f1c3d56a901_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
42600_2-4-8-1-3_1420_913

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; Google-Extended/1.0; +http://www.google.com/bot.html)1
Mozilla/5.0 (compatible; Claude-User/1.0; +https://www.anthropic.com/claude-user)1
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Amazonbot/0.1; +https://developer.amazon.com/support/amazonbot)1
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Claude-SearchBot/1.0; +https://www.anthropic.com/claude-searchbot)1
Mozilla/5.0 (compatible; meta-externalagent/1.1; +https://developers.facebook.com/docs/sharing/webmasters/crawler)1
Mozilla/5.0 (compatible; Claude-User/1.0; +Claude-User@anthropic.com)1
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko; compatible; PerplexityBot/1.0; +https://perplexity.ai/perplexitybot) Chrome/85.0.4460.164 Safari/537.36 Edg/85.0.4460.1641
Mozilla/5.0 (Macintosh; Intel Mac OS X 14_5) AppleWebKit/537.36 (KHTML, like Gecko; compatible; Claude-User/1.0; +https://www.anthropic.com/claude-user) Chrome/134.0.6564.246 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko; compatible; TelegramBot/1.0) Chrome/151.0.3993.237 Mobile Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 18_4 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) Chrome/134.0.8079.6 Mobile Safari/537.361

Country

fingerprintco-occurrences
US · United States13

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC13