TLS ClientHello (JA4)

t13d2015h2_a09f3c656075_c258b721e490

first seen 2026-08-25 12:19 · last seen 2026-09-14 14:32 · JSON

Last 7 days (7 observations)

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

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`20`
Extension count	`15`
ALPN	`h2`
Ciphers	`000a, 002f, 0035, 009c, 009d, 1301, 1302, 1303, c008, c009, c00a, c012, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0015, 0017, 001b, 0023, 002b, 002d, 0033, ff01`
Signature algorithms	`0403, 0804, 0401, 0503, 0805, 0805, 0501, 0806, 0601, 0201`
JA4_r	`t13d2015h2_000a,002f,0035,009c,009d,1301,1302,1303,c008,c009,c00a,c012,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0015,0017,001b,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0805,0501,0806,0601,0201`
JA4_o (sample)	`t13d2015h2_de3eb69493ac_6bea9ae02437`
JA4_ro (sample)	`t13d2015h2_1301,1302,1303,c02c,c02b,cca9,c030,c02f,cca8,c00a,c009,c014,c013,009d,009c,0035,002f,c008,c012,000a_0000,0017,ff01,000a,000b,0023,0010,0005,000d,0012,0033,002d,002b,001b,0015_0403,0804,0401,0503,0805,0805,0501,0806,0601,0201`

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.

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn08enus_1945e0741196_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.4, safari 26.6.2.The fingerprint page shows the full measured match list. More on the catalog.	9
`ge20nn08engb_1945e0741196_000000000000_000000000000`	2

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`2:0;3:100;4:2097152;9:1\|10420225\|0\|m,s,a,p` Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	10
`2:0;4:2097152;5:16384;6:16384\|10420225\|0\|m,s,a,p`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:53+11:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:0`	4
`4:113+15:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0`	2
`6:41+23:0:1342:mss*30,7:mss,sok,ts,nop,ws:flow:0`	2
`4:50+14:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:0`	1
`6:43+21:0:1342:mss*30,7:mss,sok,ts,nop,ws:flow:0`	1
`4:48+16:0:1380:mss*31,7:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64860_2-4-8-1-3_1380_10`	4
`43200_2-4-8-1-3_1342_7`	3
`64240_2-1-3-1-1-4_1460_8`	2
`65535_2-4-8-1-3_1460_6`	1
`42780_2-4-8-1-3_1380_7`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (iPhone; CPU iPhone OS 26_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Mobile/15E148 Safari/604.1`	11

Country

fingerprint	co-occurrences
`GB` · United Kingdom	4
`CY` · Cyprus	4
`US` · United States	3

Network (ASN)

fingerprint	co-occurrences
`AS57169` · EDIS GmbH	4
`AS2856` · British Telecommunications Limited	3
`AS20001` · Charter Communications Inc	2
`AS701` · Verizon Business	1
`AS13285` · TalkTalk Communications Limited	1