TLS ClientHello (JA4)

t13d221000_231e334592e8_29829a46703f

first seen 2026-06-20 14:47 · last seen 2026-08-27 12:56 · 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 count22
Extension count10
ALPN00
Ciphers002f, 0035, 003c, 003d, 009c, 009d, 009e, 009f, 1301, 1302, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030
Extensions000a, 000d, 0017, 0023, 002b, 002d, 0031, 0033, ff01
Signature algorithms0804, 0805, 0806, 0401, 0501, 0201, 0403, 0503, 0203, 0202, 0601, 0603
JA4_rt13d221000_002f,0035,003c,003d,009c,009d,009e,009f,1301,1302,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030_000a,000d,0017,0023,002b,002d,0031,0033,ff01_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603
JA4_o (sample)t13d221000_fd6997f2ee80_9e2dda6c8e3c
JA4_ro (sample)t13d221000_1302,1301,c02c,c02b,c030,c02f,009f,009e,c024,c023,c028,c027,c00a,c009,c014,c013,009d,009c,003d,003c,0035,002f_0000,002b,000d,0023,000a,0033,0031,0017,ff01,002d_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603

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
ge11nn15enus_35372a7bda31_000000000000_0000000000003
ge11nn040000_88d30a62b7ad_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.2
ge11nn030000_0db47b7d240d_000000000000_0000000000001
ge11nn040000_532a1ee47909_000000000000_0000000000001
ge11nn12enus_d9dcce99a5ac_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:114+14:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:03
4:110+18:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:53+11:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:120+8:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:115+13:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_71
64240_2-1-3-1-1-4_1460_81

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.363
Mozilla/5.02
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 Edg/149.0.0.01

Country

fingerprintco-occurrences
DE · Germany3
GB · United Kingdom2
LT · Lithuania2
IN · India1

Network (ASN)

fingerprintco-occurrences
AS49581 · Ferdinand Zink trading as Tube-Hosting3
AS25369 · Hydra Communications Ltd2
AS209605 · UAB Host Baltic2
AS40676 · Psychz Networks1