TLS ClientHello (JA4)

t12i280600_d943125447b4_e7e480e5a997

first seen 2026-10-12 02:07 · last seen 2026-10-15 18:34 · 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 version12
SNIi (no SNI / IP)
Cipher count28
Extension count6
ALPN00
Ciphers002f, 0033, 0035, 0039, 003c, 003d, 0067, 006b, 009c, 009d, 009e, 009f, 00ff, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030, cca8, cca9, ccaa
Extensions000a, 000b, 000d, 0016, 0017, 0023
Signature algorithms0403, 0503, 0603, 0807, 0808, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0301, 0302, 0402, 0502, 0602
JA4_rt12i280600_002f,0033,0035,0039,003c,003d,0067,006b,009c,009d,009e,009f,00ff,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030,cca8,cca9,ccaa_000a,000b,000d,0016,0017,0023_0403,0503,0603,0807,0808,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602
JA4_o (sample)t12i280600_fb9300bf4368_de96c9571173
JA4_ro (sample)t12i280600_c02c,c030,009f,cca9,cca8,ccaa,c02b,c02f,009e,c024,c028,006b,c023,c027,0067,c00a,c014,0039,c009,c013,0033,009d,009c,003d,003c,0035,002f,00ff_000b,000a,0023,0016,0017,000d_0403,0503,0603,0807,0808,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602

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
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0, curl 7.88.1, curl 8.21.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.3

TCP SYN (p0f)

fingerprintco-occurrences
4:113+15:0:1460:8192,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:121+7:0:1460:8192,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:120+8:0:1460:8192,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
8192_2-1-3-1-1-4_1460_83

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.4879.113 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3776.93 Safari/537.36 OPR/80.0.3776.931
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.8184.58 Safari/537.36 Silk/103.0.8184.581

Country

fingerprintco-occurrences
BG · Bulgaria3

Network (ASN)

fingerprintco-occurrences
AS209702 · SOLDATOV ALEXEY VALEREVICH3

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,00181