TLS ClientHello (JA4)

t13d1713h1_5b57614c22b0_eca864cca44a

first seen 2026-07-24 10:58 · last seen 2026-10-22 11:15 · 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	`17`
Extension count	`13`
ALPN	`h1`
Ciphers	`002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0015, 0017, 0023, 002b, 002d, 0033, ff01`
Signature algorithms	`0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601, 0201`
JA4_r	`t13d1713h1_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0015,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601,0201`
JA4_o (sample)	`t13d1713h1_975a97fbd916_e4ab96ca226e`
JA4_ro (sample)	`t13d1713h1_1301,1302,1303,c02b,c02c,cca9,c02f,c030,cca8,c009,c00a,c013,c014,009c,009d,002f,0035_0000,0017,ff01,000a,000b,0023,0010,0005,000d,0033,002d,002b,0015_0403,0804,0401,0503,0805,0501,0806,0601,0201`

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_4f6f4aad0c1e_000000000000_000000000000`	24
`ge11nn040000_e95d383d42e4_000000000000_000000000000`	16
`ge11nn05enus_ec73517afef7_000000000000_000000000000`	14
`ge11nn050000_b87164279ccf_000000000000_000000000000`	4
`ge11cr070000_b0d73ed11437_c00282046cf0_5164c8a8598f`	2
`ge11nn050000_dc01eb6f2852_000000000000_000000000000`	1
`ge11nn05en00_ec73517afef7_000000000000_000000000000`	1
`ge11nn05es00_ec73517afef7_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:48+16:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	22
`4:54+10:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	15
`4:49+15:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	7
`4:50+14:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	7
`4:56+8:0:1460:65535,10:mss,sok,ts,nop,ws:df,id+:0`	3
`4:117+11:0:1440:65535,8:mss,nop,ws,sok,ts:df,id+:0`	2
`4:51+13:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:0`	1
`6:43+21:0:1300:65535,9:mss,sok,ts,nop,ws:flow:0`	1
`6:48+16:0:1300:65535,9:mss,sok,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,ws:flow:0`	1
`4:49+15:0:1359:65535,9:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_10`	51
`65535_2-4-8-1-3_1460_10`	3
`65535_2-1-3-4-8_1440_8`	2
`65535_2-4-8-1-3_1359_9`	2
`65535_2-4-8-1-3_1460_9`	1
`64240_2-4-8-1-3_1424_7`	1
`65535_2-4-8-1-3_1432_9`	1
`65535_2-4-8-1-3_1300_9`	1
`65535_2-4-1-1-1-1-1-1-1-1-1-1-1-3_1300_9`	1

User-Agent

fingerprint	co-occurrences
`Dalvik/2.1.0 (Linux; U; Android 15; sdk_gphone64_x86_64 Build/AE3A.240806.043)`	21
`Dalvik/2.1.0 (Linux; U; Android 17; sdk_gphone64_x86_64 Build/CE2A.260420.019)`	16
`Dalvik/2.1.0 (Linux; U; Android 16; sdk_gphone64_x86_64 Build/BE2A.250530.026.F3)`	14
`Mozilla/5.0`	4
`Dalvik/2.1.0 (Linux; U; Android 11; redroid11_x86_64 Build/RD2A.211001.002)`	2
`WhatsApp/2.23.20.0`	2
`Dalvik/2.1.0 (Linux; U; Android 13; CMA-LX3 Build/HONORCMA-L43CQ)`	2
`Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:24.0) Gecko/20100101 Firefox/24.0 Chrome/80.0.3987.132 Safari/537.36`	1
`Dalvik/2.1.0 (Linux; U; Android 16; 2407FRK8EC Build/BP2A.250605.031.A3)`	1

Country

fingerprint	co-occurrences
`US` · United States	37
`NL` · Netherlands	17
`RU` · Russia	2
`CU` · Cuba	2
`HK` · Hong Kong SAR China	1
`MX` · Mexico	1
`CN` · China	1
`IN` · India	1
`ES` · Spain	1

Network (ASN)

fingerprint	co-occurrences
`AS132892` · Cloudflare, Inc.	34
`AS202623` · Cloudflare Inc	17
`AS30058` · FDCservers.net	3
`AS12389` · PJSC Rostelecom	2
`AS27725` · Empresa de Telecomunicaciones de Cuba, S.A.	2
`AS132203` · Tencent Building, Kejizhongyi Avenue	1
`AS212238` · Datacamp Limited	1
`AS4134` · CHINANET BACKBONE	1
`AS55836` · Reliance Jio Infocomm Limited	1
`AS57269` · DIGI SPAIN TELECOM S.A	1

TLS supported groups

fingerprint	co-occurrences
`001d,0017,0018` Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, powershell 7.6.8, +1 more.The fingerprint page shows the full measured match list. More on the catalog.	5