TLS ClientHello (JA4)

t13d1513h2_8daaf6152771_eca864cca44a

first seen 2026-07-01 14:38 · last seen 2026-08-17 22:19 · 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	`15`
Extension count	`13`
ALPN	`h2`
Ciphers	`002f, 0035, 009c, 009d, 1301, 1302, 1303, 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	`t13d1513h2_002f,0035,009c,009d,1301,1302,1303,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)	`t13d1513h2_5e6866808799_a93f8f633554`
JA4_ro (sample)	`t13d1513h2_1301,1302,1303,c02b,c02c,cca9,c02f,c030,cca8,c013,c014,009c,009d,002f,0035_0005,ff01,0033,0000,0017,000d,002d,0023,000a,0010,002b,000b,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
`ge20nn030000_80b089f68b8e_000000000000_000000000000`	31
`ge20nn020000_b89ce445e0b3_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.0, go-net/http 1.26.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog.	5
`ge20nn020000_fb4f949fd323_000000000000_000000000000`	4
`ge20nn030000_6dac75bd47eb_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.	3
`ge20nn04enus_39a3ba4480e8_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog.	3
`ge20nn030000_ff50983941c1_000000000000_000000000000`	2
`ge20nn050000_de1433f8c918_000000000000_000000000000`	1
`ge20nn070000_4c5876fa6f79_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`4:16777216\|16711681\|0\|m,p,a,s`	50

TCP SYN (p0f)

fingerprint	co-occurrences
`4:117+11:0:1440:65535,8:mss,nop,ws,sok,ts:df,id+:0`	11
`4:49+15:0:1452:65535,10:mss,sok,ts,nop,ws:df,id+:0`	9
`4:47+17:0:1460:65535,8:mss,sok,ts,nop,ws:df,id+:0`	2
`4:53+11:0:1452:65535,8:mss,sok,ts,nop,ws:df,id+:0`	2
`6:242+13:0:1220:65535,10:mss,sok,ts,nop,ws:flow:0`	2
`4:48+16:0:1440:65535,9:mss,sok,ts,nop,ws:df,id+:0`	2
`4:48+16:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:0`	1
`4:45+19:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:0`	1
`4:52+12:0:1460:65535,8:mss,sok,ts,nop,ws:df,id+:0`	1
`4:111+17:0:1400:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-4-8_1440_8`	11
`65535_2-4-8-1-3_1452_10`	9
`65535_2-4-8-1-3_1440_8`	4
`65535_2-4-8-1-3_1460_8`	4
`65535_2-4-8-1-3_1452_8`	4
`65535_2-4-8-1-3_1460_9`	3
`65535_2-1-3-1-1-4_1400_8`	3
`65535_2-4-8-1-3_1440_9`	2
`65535_2-4-8-1-3_1392_9`	2
`65535_2-4-8-1-3_1220_10`	2

User-Agent

fingerprint	co-occurrences
`Harmonic-HN-Android/3.0.1/release`	27
`okhttp/4.12.0`	9
`Harmonic-HN-Android/3.0.2/release`	4
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36`	3
`SpaceCowboys Android RSS Reader / 2.21.1(4025)`	3
`ozonhireapp_android_prod`	2
`ReadYou/0.16.1(46)`	1
`ReadYou/0.16.2(47)`	1

Country

fingerprint	co-occurrences
`CA` · Canada	12
`RU` · Russia	12
`DE` · Germany	5
`US` · United States	3
`IN` · India	3
`EG` · Egypt	3
`AU` · Australia	2
`BR` · Brazil	2
`ES` · Spain	2
`GB` · United Kingdom	1

Network (ASN)

fingerprint	co-occurrences
`AS12389` · PJSC Rostelecom	11
`AS577` · Bell Canada	9
`AS3320` · Deutsche Telekom AG	3
`AS24863` · Link Egypt (Link.NET)	3
`AS3352` · TELEFONICA DE ESPANA S.A.U.	2
`AS8167` · V tal	2
`AS9829` · National Internet Backbone	2
`AS11427` · Charter Communications Inc	1
`AS7018` · AT&T Enterprises, LLC	1
`AS14593` · Space Exploration Technologies Corporation	1