TLS ClientHello (JA4)

t13d181100_85036bcba153_d41ae481755e

first seen 2026-06-16 04:06 · last seen 2026-10-31 15:15 · JSON

Last 7 days (15 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	`18`
Extension count	`11`
ALPN	`00`
Ciphers	`0067, 006b, 009e, 009f, 00ff, 1301, 1302, 1303, c023, c024, c027, c028, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`000a, 000b, 000d, 0015, 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	`t13d181100_0067,006b,009e,009f,00ff,1301,1302,1303,c023,c024,c027,c028,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0015,0016,0017,0023,002b,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)	`t13d181100_a2fb288ce784_aaa1579dc5ae`
JA4_ro (sample)	`t13d181100_1302,1303,1301,c02c,c030,c02b,c02f,cca9,cca8,c024,c028,c023,c027,009f,009e,006b,0067,00ff_0000,000b,000a,0023,0016,0017,000d,002b,002d,0033,0015_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
`ge11nn06enus_a89d28968959_000000000000_000000000000`	47
`ge11nn040000_e1d2031bdfea_000000000000_000000000000`	24
`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.	24
`ge11nn06en00_c8b5fb2f281e_000000000000_000000000000`	19
`ge11nn040000_97407f6e446d_000000000000_000000000000`	18
`ge11nn040000_5b1e8b5f4d2d_000000000000_000000000000`	17
`ge11nn14engb_c70c3fb4283f_000000000000_000000000000`	16
`ge11nn040000_88d30a62b7ad_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.	12
`ge11nn040000_08e7224bf8c7_000000000000_000000000000`	12
`ge11nn030000_52193b36b64e_000000000000_000000000000`	11

TCP SYN (p0f)

fingerprint	co-occurrences
`4:57+7:0:1420:mss*30,7:mss,sok,ts,nop,ws:df,id+:0`	17
`4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	14
`4:56+8:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:0`	13
`4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	11
`4:57+7:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	11
`4:56+8:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:0`	10
`4:111+17:0:1460:62720,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0`	10
`4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	9
`4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	8
`4:53+11:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	8

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_7`	63
`62720_2-1-3-1-1-4_1460_8`	31
`65535_2-1-3-1-1-4_1440_8`	30
`42340_2-4-8-1-3_1460_12`	24
`42600_2-4-8-1-3_1420_7`	16
`64240_2-1-3-1-1-4_1460_8`	11
`64240_2-4-8-1-3_1399_7`	10
`42340_2-4-8-1-3_1460_11`	10
`65535_2-1-3-4-8_1452_8`	10
`64800_2-4-8-1-3_1440_7`	9

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36`	51
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36`	30
`Mozilla/5.0`	23
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36`	20
`Mozilla/5.0 (Linux; Android 12; Pixel 6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Mobile Safari/537.36`	18
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125 Safari/537.36 HackerMiniStoryImage/1.0`	18
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.89 Safari/537.36`	17
`Mozilla/5.0 (compatible)`	9
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36`	6
`WordPress/6.4.3; https://wordpress.org/`	6

Country

fingerprint	co-occurrences
`US` · United States	54
`NL` · Netherlands	54
`SG` · Singapore	23
`FR` · France	16
`CH` · Switzerland	14
`SA` · Saudi Arabia	14
`VN` · Vietnam	12
`AU` · Australia	10
`GB` · United Kingdom	10
`AE` · United Arab Emirates	10

Network (ASN)

fingerprint	co-occurrences
`AS396982` · Google LLC	35
`AS48090` · TECHOFF SRV LIMITED	34
`AS8075` · Microsoft Corporation	33
`AS31898` · Oracle Corporation	33
`AS45102` · Alibaba (US) Technology Co., Ltd.	21
`AS41608` · NextGenWebs, S.L.	14
`AS212238` · Datacamp Limited	10
`AS215599` · Zkillu SAS	9
`AS16509` · Amazon.com, Inc.	6
`AS201579` · HOSTGNOME LTD	6

TLS supported groups

fingerprint	co-occurrences
`001d,0017,001e,0019,0018,0100,0101,0102,0103,0104` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.	48