TLS ClientHello (JA4)

t13d0912h2_f91f431d341e_0d46a1bf4a7c

first seen 2026-08-11 10:20 · last seen 2026-08-11 10:20 · JSON

Decomposed attributes

Protocolt (TLS over TCP)
TLS version13
SNId (domain)
Cipher count9
Extension count12
ALPNh2
Ciphers1301, 1302, 1303, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0016, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0905, 0906, 0904, 0403, 0503, 0603, 0807, 0808, 081a, 081b, 081c, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0301, 0302, 0402, 0502, 0602, 0708
JA4_rt13d0912h2_1301,1302,1303,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0016,0017,0023,002b,002d,0033,ff01_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602,0708
JA4_o (sample)t13d0912h2_26ad3ec6d508_6dc83a2fec95
JA4_ro (sample)t13d0912h2_1302,1303,1301,c02b,c02f,c02c,c030,cca9,cca8_ff01,000b,000a,0023,0016,0017,000d,002b,002d,0033,0000,0010_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602,0708

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_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:4096;2:0;4:2147483647;5:131072;8:0;3:100;6:65536|2147418112|0|m,s,p,a1

TCP SYN (p0f)

fingerprintco-occurrences
4:44+20:0:1440:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

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

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
NL · Netherlands1

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation1