TLS ClientHello (JA4)

t13d1516h2_8daaf6152771_341b5f081590

first seen 2026-09-30 09:38 · last seen 2026-10-10 09:57 · 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

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`15`
Extension count	`16`
ALPN	`h2`
Ciphers	`002f, 0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0017, 001b, 0023, 002b, 002d, 0033, 4469, fe0d, ff01`
Signature algorithms	`0403, 0804, 0401, 0501, 0503`
JA4_r	`t13d1516h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,0023,002b,002d,0033,4469,fe0d,ff01_0403,0804,0401,0501,0503`
JA4_o (sample)	`t13d1516h2_acb858a92679_6df96f46b0d8`
JA4_ro (sample)	`t13d1516h2_1301,1302,1303,c02b,c02f,c02c,c030,cca9,cca8,c013,c014,009c,009d,002f,0035_0033,0012,000d,001b,000a,ff01,0005,0023,002d,000b,4469,0017,0010,002b,fe0d,0000_0403,0804,0401,0501,0503`

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
`ge20nn13enus_0c2c1d640f3e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog.	3

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, +57 more.The fingerprint page shows the full measured match list. More on the catalog.	3

TCP SYN (p0f)

fingerprint	co-occurrences
`4:50+14:0:1452:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0`	1
`4:46+18:0:1380:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0`	1
`4:50+14:0:1380:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-8-4-0-0_1380_6`	2
`65535_2-1-3-1-1-8-4-0-0_1452_6`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36`	3

Country

fingerprint	co-occurrences
`TR` · Turkey	3

Network (ASN)

fingerprint	co-occurrences
`AS9121` · Turk Telekomunikasyon Anonim Sirketi	2
`AS8386` · Vodafone Net Iletisim Hizmetler AS	1