TLS ClientHello (JA4)

t13d171100_ab0a1bf427ad_8e6e362c5eac

first seen 2026-06-29 16:38 · last seen 2026-10-29 19:41 · JSON

Last 7 days (8 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

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`17`
Extension count	`11`
ALPN	`00`
Ciphers	`0067, 006b, 009e, 009f, 1301, 1302, 1303, c023, c024, c027, c028, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`000a, 000b, 000d, 0016, 0017, 0023, 002b, 002d, 0033, ff01`
Signature algorithms	`0905, 0906, 0904, 0403, 0503, 0603, 0807, 0808, 081a, 081b, 081c, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0301, 0302, 0402, 0502, 0602`
JA4_r	`t13d171100_0067,006b,009e,009f,1301,1302,1303,c023,c024,c027,c028,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0016,0017,0023,002b,002d,0033,ff01_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602`
JA4_o (sample)	`t13d171100_fd0eb050439a_b609e078c809`
JA4_ro (sample)	`t13d171100_1302,1303,1301,c02c,c030,c02b,c02f,cca9,cca8,c024,c028,c023,c027,009f,009e,006b,0067_ff01,0000,000b,000a,0023,0016,0017,000d,002b,002d,0033_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602`

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
`ge11nn06enus_a89d28968959_000000000000_000000000000`	6
`ge11nn050000_ea6f06182064_000000000000_000000000000`	5
`ge11nn040000_5b1e8b5f4d2d_000000000000_000000000000`	3
`ge11nn06enus_c11ebffaa84b_000000000000_000000000000`	2
`ge11nn050000_b223a0ebb0b5_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.	1
`he11nn030000_7a6d35f8646f_000000000000_000000000000`	1
`ge11nn050000_3658ef221638_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.21.4, wget 1.25.0, wget 1.21.3.The fingerprint page shows the full measured match list. More on the catalog.	1
`ge11nn06en00_c11ebffaa84b_000000000000_000000000000`	1
`ge11nn05enus_d479504c460e_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`6:43+21:0:1424:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:ecn,flow:0`	5
`6:47+17:0:1260:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:ecn,flow:0`	2
`4:41+23:0:1250:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0`	2
`4:57+7:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`4:49+15:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0`	1
`4:48+16:0:1460:mss*20,6:mss,sok,ts,nop,ws:df,id+:0`	1
`4:50+14:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:id-,ecn:0`	1
`4:56+8:0:1460:mss*44,8:mss,sok,ts,nop,ws:df,id+:0`	1
`4:48+16:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0`	1
`4:52+12:0:1452:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-8-4-0-0_1460_6`	5
`65535_2-1-3-1-1-8-4-0-0_1424_6`	5
`65535_2-1-3-1-1-8-4-0-0_1250_6`	2
`65535_2-1-3-1-1-8-4-0-0_1260_6`	2
`64240_2-4-8-1-3_1460_7`	1
`64240_2-4-8-1-3_1460_8`	1
`64240_2-4-8-1-3_1452_7`	1
`65535_2-1-3-4-8_1440_12`	1
`65535_2-1-3-1-1-8-4-0-0_1386_6`	1
`65535_2-1-3-1-1-8-4-0-0_1444_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/130.0 Safari/537.36`	6
`cf-defaults-research/0.1 (academic research; fetches robots.txt and homepage once)`	4
`Mozilla/5.0`	2
`Mozilla/5.0 (Macintosh) Chrome/120`	2
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36 LeadResearch/1.0`	2
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36`	1
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`TH` · Thailand	6
`DE` · Germany	4
`US` · United States	3
`AU` · Australia	2
`JP` · Japan	2
`NL` · Netherlands	1
`RU` · Russia	1
`IN` · India	1
`IL` · Israel	1

Network (ASN)

fingerprint	co-occurrences
`AS17552` · True Online	6
`AS12816` · Leibniz-Rechenzentrum	4
`AS7018` · AT&T Enterprises, LLC	2
`AS2516` · KDDI CORPORATION	2
`AS4804` · Microplex PTY LTD	2
`AS48090` · TECHOFF SRV LIMITED	1
`AS208172` · Proton AG	1
`AS41275` · Lovitel LLC	1
`AS1680` · Cellcom Fixed Line Communication L.P	1
`AS45184` · Den Digital Entertainment Pvt. Ltd. AS ISP india	1

TLS supported groups

fingerprint	co-occurrences
`11ec,001d,0017,001e,0018,0019,0100,0101` Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	16