TLS ClientHello (JA4)

t13d3514h1_bfa337485184_678a800b2221

first seen 2026-07-18 17:11 · last seen 2026-09-10 21:59 · JSON

Last 7 days (2 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	`35`
Extension count	`14`
ALPN	`h1`
Ciphers	`002f, 0033, 0035, 0039, 003c, 003d, 0067, 006b, 009c, 009d, 009e, 009f, 1301, 1302, 1303, 1304, c009, c00a, c013, c014, c023, c027, c02b, c02c, c02f, c030, c09c, c09d, c09e, c09f, c0ac, c0ad, cca8, cca9, ccaa`
Extensions	`000a, 000b, 000d, 0015, 0016, 0017, 001b, 0023, 002b, 002d, 0033, ff01`
Signature algorithms	`0403, 0503, 0603, 0807, 0808, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0301`
JA4_r	`t13d3514h1_002f,0033,0035,0039,003c,003d,0067,006b,009c,009d,009e,009f,1301,1302,1303,1304,c009,c00a,c013,c014,c023,c027,c02b,c02c,c02f,c030,c09c,c09d,c09e,c09f,c0ac,c0ad,cca8,cca9,ccaa_000a,000b,000d,0015,0016,0017,001b,0023,002b,002d,0033,ff01_0403,0503,0603,0807,0808,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301`
JA4_o (sample)	`t13d3514h1_f8a84e837758_f7a034fe9016`
JA4_ro (sample)	`t13d3514h1_1302,1303,1301,1304,c02c,c030,cca9,cca8,c0ad,c02b,c02f,c0ac,c023,c027,c00a,c014,c009,c013,009d,c09d,009c,c09c,003d,003c,0035,002f,009f,ccaa,c09f,009e,c09e,006b,0067,0039,0033_ff01,0000,000b,000a,0023,0010,0016,0017,000d,002b,002d,0033,001b,0015_0403,0503,0603,0807,0808,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301`

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_50034e570378_000000000000_000000000000`	3
`ge11nn040000_e1d2031bdfea_000000000000_000000000000`	1
`ge11nn050000_be0d0b335e46_000000000000_000000000000`	1
`ge11cn040000_e1d2031bdfea_0316f1c41b17_4abadb6098f3`	1
`ge11nn07enus_0620a9ced396_000000000000_000000000000`	1
`ge11nn07enus_c5479ee49fdc_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:117+11:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0`	3
`4:119+9:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0`	2
`4:114+14:0:1460:62727,9:mss,sok,ts,nop,ws:df,id+:0`	2
`4:54+10:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`62727_2-4-8-1-3_1460_7`	5
`62727_2-4-8-1-3_1460_9`	2
`32120_2-4-8-1-3_1460_7`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (compatible; getdomaindata/1.0; +https://getdomaindata.com/bot)`	3
`Mozilla/5.0 (compatible; MeasureboardResearchBot/1.0; +https://measureboard.com/bot)`	2
`Claude-User`	2
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`US` · United States	5
`GB` · United Kingdom	2
`KR` · South Korea	1

Network (ASN)

fingerprint	co-occurrences
`AS14618` · Amazon.com, Inc.	5
`AS16509` · Amazon.com, Inc.	2
`AS4766` · Korea Telecom	1