TCP SYN (p0f)

4:55+9:0:1460:65535,13:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 08:10 · last seen 2026-10-27 03:01 · JSON

Last 7 days (1 observations)

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 TTL55+9
Options length0
MSS1460
Window size65535
Window scale13
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
t13d1312h2_a44d0ee8b3cc_e381dae6da6b40
t13d1412h2_e33ad33b3d25_6b314db333b61

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn080000_3b4736f856c0_000000000000_00000000000016
ge20nn11enus_3e96b3a49e4b_000000000000_0000000000006
ge20nn090000_2b87eda31960_000000000000_0000000000005
ge20nn19enus_6d96c1a2ad8a_000000000000_0000000000004
ge20nn090000_6c95df8859bf_000000000000_0000000000002
ge20nn070000_1c05be67a921_000000000000_0000000000002
ge20nn21enus_7551c00c2ffa_000000000000_0000000000001
ge20nn080000_eab49c6106e6_000000000000_0000000000001
ge20nr19enus_6d96c1a2ad8a_000000000000_0000000000001
ge20nr16enus_1c2e6a6459e6_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;3:1;4:8388608;5:65536|8323073|0|m,s,a,p41

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1460_1340

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; GCombinator/1.0; +https://news.gcombinator.com)17
Mozilla/5.0 (compatible; SquareTownBot/1.0; +https://square.pov.town)5
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)3
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.362
Mozilla/5.0 (compatible; HackerNewsAggregator/1.0)2
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ChatGPT-User/1.0; +https://openai.com/bot)2
Mozilla/5.0 (Linux; Android 14; Pixel 8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.6422.113 Mobile Safari/537.362
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
SG · Singapore34
US · United States7

Network (ASN)

fingerprintco-occurrences
AS13335 · Cloudflare, Inc.41

TLS supported groups

fingerprintco-occurrences
001d,0017,0018,0019,11ec,6399,fe323