TLS ClientHello (JA4)

t13d1518h2_8daaf6152771_e2d80978ab2e

first seen 2026-08-26 04:38 · last seen 2026-09-14 22:56 · 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

Protocolt (TLS over TCP)
TLS version13
SNId (domain)
Cipher count15
Extension count18
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02c, c02f, c030, cca8, cca9
Extensions0005, 000a, 000b, 000d, 0012, 0017, 001b, 0023, 0029, 002b, 002d, 0033, 44cd, ca34, fe0d, ff01
Signature algorithms0904, 0905, 0906, 0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601
JA4_rt13d1518h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,0023,0029,002b,002d,0033,44cd,ca34,fe0d,ff01_0904,0905,0906,0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d1518h2_acb858a92679_80a94583019c
JA4_ro (sample)t13d1518h2_1301,1302,1303,c02b,c02f,c02c,c030,cca9,cca8,c013,c014,009c,009d,002f,0035_002b,44cd,002d,000a,000b,001b,0005,0010,0033,0023,ff01,0012,fe0d,ca34,000d,0017,0000,0029_0904,0905,0906,0403,0804,0401,0503,0805,0501,0806,0601

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
ge20nn14zhcn_37290af3dd07_000000000000_0000000000001
ge20nr12zhcn_880b30d20d1d_000000000000_0000000000001
ge20nr12zhcn_8be5a6f9ac89_000000000000_0000000000001
ge20nr13zhcn_76b67d1031e1_000000000000_0000000000001
ge20nr13zhcn_2b69ef52f530_000000000000_0000000000001
ge20nn13zhcn_e4aac7fcf5ac_000000000000_0000000000001
ge20nr13zhcn_8148e3698980_000000000000_0000000000001
ge20nr13zhcn_4868b11075d5_000000000000_0000000000001
ge20nr14zhcn_89340018cd48_000000000000_0000000000001
ge20nr13zhcn_71901d6d8cf1_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.19
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +42 more.The fingerprint page shows the full measured match list. More on the catalog.16
1:65536;2:0;4:6291456;6:262144|15663105|0|m,a,s,p13
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p9
1:65536;2:0;4:6291456;6:262144|15663105|9:0:0:256|m,a,s,p5
1:65536;2:0;4:6291456;6:262144|15663105|11:0:0:256|m,a,s,p4
1:65536;2:0;4:6291456;6:262144|15663105|13:0:0:256|m,a,s,p4
1:65536;2:0;4:6291456;6:262144|15663105|17:0:0:256|m,a,s,p4
1:65536;2:0;4:6291456;6:262144|15663105|21:0:0:256|m,a,s,p4
1:65536;2:0;4:6291456;6:262144|15663105|25:0:0:256|m,a,s,p4

TCP SYN (p0f)

fingerprintco-occurrences
4:111+17:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0147
4:112+16:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1440_8148

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36148

Country

fingerprintco-occurrences
CN · China148

Network (ASN)

fingerprintco-occurrences
AS4134 · CHINANET BACKBONE148