TLS ClientHello (JA4)

t13d2812h2_257f3020b3a2_cbb9361b6bf9

first seen 2026-07-18 21:38 · last seen 2026-09-15 21:19 · JSON

Last 7 days (29 observations)

Distinct clients per day (last 30 days, peak 9/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 1.27.0, go-net/http 1.26.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog.63
ge20nn010000_379fadc6c8b7_000000000000_0000000000004
ge20cr06enus_ba5e17eeb7c7_000000000000_0000000000002
ge20nr020000_332fce1c30d2_000000000000_0000000000001
ge20cn010000_379fadc6c8b7_000000000000_0000000000001
ge20cn06enus_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,p49
1:65536;2:0;4:6291456;6:262144|15663105|3:0:0:256|m,a,s,p12
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
4:47+17:0:1440:65535,6: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
4:51+13:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:44+20:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:42+22:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:48+16:0:1400:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:52+12:0:1440:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:45+19:0:1380:65535,6:mss,sok,ts,nop,ws:df,id+:02

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_711
65535_2-4-8-1-3_1412_68
65535_2-4-8-1-3_1400_68
65535_2-4-8-1-3_1460_67
65535_2-4-8-1-3_1452_66
64240_2-4-8-1-3_1412_16
65535_2-4-8-1-3_1440_66
64240_2-4-8-1-3_1400_14
64240_2-4-8-1-3_1452_13
65535_2-4-8-1-3_1380_62

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/537.3631
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.365
Mozilla/5.0 fake/15
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.363
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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 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 · Brazil14
SE · Sweden11
IQ · Iraq6
TR · Turkey5
IN · India3
AR · Argentina3
MA · Morocco3
VE · Venezuela3
PH · Philippines2
JO · Jordan2

Network (ASN)

fingerprintco-occurrences
AS214379 · South Park Networks LLC11
AS216472 · High Speed For Internet Services L.L.C4
AS199739 · Earthlink Telecommunications Equipment Trading & Services DMCC3
AS9299 · Philippine Long Distance Telephone Company2
AS203214 · Hulum Almustakbal Company for Communication Engineering and Services Ltd2
AS8697 · Jordan Telecommunications PSC2
AS9051 · IncoNet Data Management sal2
AS28048 · Internet Para Todos - Gobierno de La Rioja2
AS28668 · Desktop Sigmanet Comunicação Multimídia SA2
AS262700 · VERO S.A2