TLS ClientHello (JA4)

t13d2812h2_257f3020b3a2_cbb9361b6bf9

first seen 2026-07-18 21:38 · last seen 2026-10-30 20:14 · JSON

Last 7 days (6 observations)

Distinct clients per day (last 30 days, peak 4/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

Protocolt (TLS over TCP)
TLS version13
SNId (domain)
Cipher count28
Extension count12
ALPNh2
Ciphers002f, 0033, 0035, 0039, 003c, 003d, 0067, 006b, 009c, 009d, 009e, 009f, 1301, 1302, 1303, c009, c00a, c013, c014, c023, c024, c028, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0015, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601
JA4_rt13d2812h2_002f,0033,0035,0039,003c,003d,0067,006b,009c,009d,009e,009f,1301,1302,1303,c009,c00a,c013,c014,c023,c024,c028,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0015,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d2812h2_4527a0c5d022_8cae22093da9
JA4_ro (sample)t13d2812h2_1301,1302,1303,c02b,c02f,c02c,c030,cca9,cca8,003c,003d,c009,c013,c00a,c014,c023,c024,c028,009c,009d,002f,0035,0033,0039,0067,006b,009e,009f_0000,0017,ff01,000a,000b,0023,0010,000d,0033,002d,002b,0015_0403,0804,0401,0503,0805,0501,0806,0601

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)

fingerprintco-occurrences
ge20nn020000_b89ce445e0b3_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.1, go-net/http 1.27.0, +14 more.The fingerprint page shows the full measured match list. More on the catalog.92
ge20cr06enus_ba5e17eeb7c7_000000000000_0000000000005
ge20nn010000_379fadc6c8b7_000000000000_0000000000004
ge20cn010000_379fadc6c8b7_000000000000_0000000000002
ge20nr020000_332fce1c30d2_000000000000_0000000000001
ge20cn06enus_ba5e17eeb7c7_000000000000_0000000000001
ge20nn06enus_ba5e17eeb7c7_000000000000_0000000000001
ge20nr06enus_ba5e17eeb7c7_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p81
1:65536;2:0;4:6291456;6:262144|15663105|3:0:0:256|m,a,s,p15
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p1
1:4096;3:100;4:1048576;6:65535|10485760|1:0:0:256|m,p,a,s1
1:4096;4:6291456;5:32768|8388608|1:0:0:256|a,s,p,m1
1:65536;2:1;4:131072;5:16384;6:131072|8388608|1:0:0:256|p,a,s,m1
1:65536;2:1;3:10000;4:1048576|6291456|1:0:0:256|m,a,p,s1
1:65536;2:0;3:10000;4:1048576;5:16384;6:131072|15663105|1:0:0:256|a,m,p,s1
1:65536;3:1000;4:131072;5:16384;6:131072|10485760|1:0:0:256|a,s,p,m1
1:4096;2:1;3:1000;4:131072|12517377|1:0:0:256|p,m,s,a1

TCP SYN (p0f)

fingerprintco-occurrences
6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:011
4:51+13:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:04
4:43+21:0:1400:65535,6:mss,sok,ts,nop,ws:df,id+:04
4:49+15:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:41+23:0:1452:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:47+17:0:1440:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1400:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1452:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1412:mss*44,1:mss,sok,ts,nop,ws:df,id+:02

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1412_614
65535_2-4-8-1-3_1400_614
64800_2-4-8-1-3_1440_711
65535_2-4-8-1-3_1460_611
65535_2-4-8-1-3_1452_611
65535_2-4-8-1-3_1440_69
64240_2-4-8-1-3_1412_17
65535_2-4-8-1-3_1420_64
64240_2-4-8-1-3_1400_14
64240_2-4-8-1-3_1452_14

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.3653
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.368
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.366
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.365
Mozilla/5.0 fake/15
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.364
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
BR · Brazil17
SE · Sweden11
IQ · Iraq8
JO · Jordan7
VE · Venezuela6
TR · Turkey5
IN · India4
AR · Argentina4
MA · Morocco3
PH · Philippines3

Network (ASN)

fingerprintco-occurrences
AS214379 · South Park Networks LLC11
AS216472 · High Speed For Internet Services L.L.C6
AS203214 · Hulum Almustakbal Company for Communication Engineering and Services Ltd3
AS199739 · Earthlink Telecommunications Equipment Trading & Services DMCC3
AS9299 · Philippine Long Distance Telephone Company2
AS8376 · Jordan Data Communications Company LLC2
AS48832 · Jordanian mobile phone services Ltd2
AS8697 · Jordan Telecommunications PSC2
AS6057 · Administracion Nacional de Telecomunicaciones2
AS9051 · IncoNet Data Management sal2

TLS supported groups

fingerprintco-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.10