TCP SYN (p0f)

4:47+17:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-16 02:13 · last seen 2026-11-01 18:44 · JSON

Last 7 days (13 observations)

Distinct clients per day (last 30 days, peak 3/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 version	`4`
Initial TTL	`47+17`
Options length	`0`
MSS	`1424`
Window size	`25380`
Window scale	`7`
Options layout	`mss,sok,ts,nop,ws`
Quirks	`df,id+`
Payload class	`0`

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)

fingerprint	co-occurrences
`t13d131100_f57a46bbacb6_e5728521abd4`	133
`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.	38
`t13d311000_e8f1e7e78f70_5ac7197df9d2`	4

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn10zhcn_9c0cf7475f83_000000000000_000000000000`	101
`ge20nn15enus_a80081d13d36_000000000000_000000000000`	36
`ge11nr10zhcn_9c0cf7475f83_000000000000_000000000000`	21
`ge11nn08zhcn_bd35aedc6348_000000000000_000000000000`	5
`ge11nr08zhcn_bd35aedc6348_000000000000_000000000000`	4
`ge11nn05zhcn_65b616753dd4_000000000000_000000000000`	4
`ge20nr14enus_4600588ae5ca_000000000000_000000000000`	2
`ge11nr10zhcn_986c3fb09fa9_000000000000_000000000000`	1
`ge11nn10zhcn_986c3fb09fa9_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.	36
`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 152.0.7977.83, +85 more.The fingerprint page shows the full measured match list. More on the catalog.	2

TCP SYN (JA4T)

fingerprint	co-occurrences
`25380_2-4-8-1-3_1424_7`	164

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1`	133
`Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)`	42

Country

fingerprint	co-occurrences
`SG` · Singapore	75
`US` · United States	44
`CN` · China	42
`TH` · Thailand	12
`JP` · Japan	2

Network (ASN)

fingerprint	co-occurrences
`AS132203` · Tencent Building, Kejizhongyi Avenue	133
`AS56046` · China Mobile communications corporation	26
`AS4837` · CHINA UNICOM China169 Backbone	14
`AS134756` · CHINANET Nanjing Jishan IDC network	2

TLS supported groups

fingerprint	co-occurrences
`11ec,001d,0017,0018,0019` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog.	26
`0a0a,11ec,001d,0017,0018` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog.	6