TLS ClientHello (JA4)

t13d1312h2_f57a46bbacb6_f50d94e863eb

first seen 2026-08-19 21:02 · last seen 2026-09-16 05:55 · JSON

Last 7 days (4 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

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`13`
Extension count	`12`
ALPN	`h2`
Ciphers	`1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0017, 002b, 0032, 0033, ff01`
Signature algorithms	`0904, 0905, 0906, 0804, 0403, 0807, 0805, 0806, 0401, 0501, 0601, 0503, 0603`
JA4_r	`t13d1312h2_1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,002b,0032,0033,ff01_0904,0905,0906,0804,0403,0807,0805,0806,0401,0501,0601,0503,0603`
JA4_o (sample)	`t13d1312h2_45672f90a73c_0907710e1447`
JA4_ro (sample)	`t13d1312h2_c02b,c02f,c02c,c030,cca9,cca8,c009,c013,c00a,c014,1301,1302,1303_0000,000b,ff01,0017,0012,0005,000a,000d,0032,0010,002b,0033_0904,0905,0906,0804,0403,0807,0805,0806,0401,0501,0601,0503,0603`

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
`ge20nr020000_fb4f949fd323_000000000000_000000000000`	5
`ge20nn020000_b89ce445e0b3_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.0, go-net/http 1.26.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`ge20nn020000_fb4f949fd323_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`2:0;4:4194304;5:1048576;6:10485760\|1073741824\|0\|a,m,p,s` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.27.0, go-net/http 1.27.1.The fingerprint page shows the full measured match list. More on the catalog.	8

TCP SYN (p0f)

fingerprint	co-occurrences
`4:51+13:0:1280:mss*51,10:mss,sok,ts,nop,ws:df,id+:0`	2
`4:48+16:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	1
`4:49+15:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	1
`4:44+20:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	1
`4:54+10:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	1
`4:53+11:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	1
`4:50+14:0:1280:mss*51,10:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`7300_2-4-8-1-3_1460_10`	5
`65280_2-4-8-1-3_1280_10`	3

User-Agent

fingerprint	co-occurrences
`curl/7.74.0`	5
`Go-http-client/2.0`	2
`scrape_central/1.0`	1

Country

fingerprint	co-occurrences
`NL` · Netherlands	3
`SG` · Singapore	3
`DE` · Germany	1
`US` · United States	1

Network (ASN)

fingerprint	co-occurrences
`AS45102` · Alibaba (US) Technology Co., Ltd.	5
`AS39351` · 31173 Services AB	2
`AS43357` · Owl Limited	1