TLS ClientHello (JA4)

t13d121100_a538d02d76d5_f6eeaf393d2e

first seen 2026-07-01 15:30 · last seen 2026-09-01 18:29 · 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	`12`
Extension count	`11`
ALPN	`00`
Ciphers	`00ff, 1301, 1302, 1303, c023, c024, c027, c028, c02b, c02c, c02f, c030`
Extensions	`0005, 000a, 000b, 000d, 0016, 0017, 0023, 002b, 002d, 0033`
Signature algorithms	`0403, 0503, 0603, 0807, 0808, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0301, 0302, 0402, 0502, 0602`
JA4_r	`t13d121100_00ff,1301,1302,1303,c023,c024,c027,c028,c02b,c02c,c02f,c030_0005,000a,000b,000d,0016,0017,0023,002b,002d,0033_0403,0503,0603,0807,0808,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602`
JA4_o (sample)	`t13d121100_3c962d0d4049_3f0014afa37c`
JA4_ro (sample)	`t13d121100_1302,1303,1301,c02c,c02b,c030,c02f,c024,c023,c028,c027,00ff_0000,000b,000a,0023,0005,0016,0017,000d,002b,002d,0033_0403,0503,0603,0807,0808,0809,080a,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
`ge11nn040000_482ead9c94af_000000000000_000000000000`	3
`ge11nn040000_ad0fd3707af2_000000000000_000000000000`	3
`ge11nn020000_70500bd9c457_000000000000_000000000000`	2
`ge11nn070000_16832da0457b_000000000000_000000000000`	2
`ge11nn050000_3658ef221638_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.21.4, wget 1.21.3, wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.	1
`ge11nn030000_fe444ad14866_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.	1
`ge11nr060000_2c5d6dd4d8e4_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:42+22:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	6
`4:41+23:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	2
`4:53+11:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`6:45+19:0:1220:mtu*19,7:mss,sok,ts,nop,ws::0`	1
`4:42+22:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	1
`6:47+17:0:1220:mtu*19,7:mss,sok,ts,nop,ws::0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_7`	8
`64240_2-4-8-1-3_1460_10`	3
`24320_2-4-8-1-3_1220_7`	2

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (compatible; StackScopeBot/1.0; +https://stackscope.dev/bot)`	6
`VerifiedApp-Scanner/0.1.0 (+https://verifiedapp.io/scanner-info)`	3
`Mozilla/5.0`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`FI` · Finland	6
`DE` · Germany	4
`US` · United States	2
`SI` · Slovenia	1

Network (ASN)

fingerprint	co-occurrences
`AS24940` · Hetzner Online GmbH	6
`AS8560` · IONOS SE	3
`AS396982` · Google LLC	2
`AS202448` · MVPS LTD	1
`AS197769` · VPS Dedicated LLC	1