TLS ClientHello (JA4)

t13d2413h2_df98b6d6dfe4_1b3407e2c936

first seen 2026-06-13 05:54 · last seen 2026-09-07 11:41 · 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 count24
Extension count13
ALPNh2
Ciphers002f, 0035, 003c, 003d, 009c, 009d, 00ff, 1301, 1302, 1303, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0015, 0016, 0017, 002b, 002d, 0031, 0033, 3374
Signature algorithms0403, 0503, 0603, 0807, 0808, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0203, 0301, 0201, 0302, 0202, 0402, 0502, 0602
JA4_rt13d2413h2_002f,0035,003c,003d,009c,009d,00ff,1301,1302,1303,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0015,0016,0017,002b,002d,0031,0033,3374_0403,0503,0603,0807,0808,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0203,0301,0201,0302,0202,0402,0502,0602
JA4_o (sample)t13d2413h2_baab0aa6b8a3_8f7eca04e4c8
JA4_ro (sample)t13d2413h2_1302,1303,1301,c02c,c030,cca9,cca8,c02b,c02f,c024,c028,c023,c027,c00a,c014,c009,c013,009d,009c,003d,003c,0035,002f,00ff_0000,000b,000a,3374,0010,0016,0017,0031,000d,002b,002d,0033,0015_0403,0503,0603,0807,0808,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0203,0301,0201,0302,0202,0402,0502,0602

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
ge20nr04zhcn_21fb322ed28d_000000000000_00000000000016
ge20nr05zhcn_8565061f331f_000000000000_00000000000011

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:1073741824;2:0|1073676289|0|m,p,s,a27

TCP SYN (p0f)

fingerprintco-occurrences
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:07
4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:05
4:46+18:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:05
4:47+17:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:53+11:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:39+25:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
6:52+12:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_714
64800_2-4-8-1-3_1440_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.115
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.57.2 (KHTML, like Gecko) Version/5.1.7 Safari/534.57.24
Mozilla/5.0 (Windows NT 10.0; WOW64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.363
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0;3
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:53.0) Gecko/20100101 Firefox/53.03
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.133 Safari/534.163
Mozilla/5.0 (Windows NT 6.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.13
Mozilla/5.0 (Windows NT 6.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.361
Openwave/ UCWEB7.0.2.37/28/9991
Opera/9.80 (Windows NT 6.1; U; en) Presto/2.8.131 Version/11.111

Country

fingerprintco-occurrences
SG · Singapore12
HK · Hong Kong SAR China12
JP · Japan3

Network (ASN)

fingerprintco-occurrences
AS45102 · Alibaba (US) Technology Co., Ltd.27