TLS ClientHello (JA4)

t13d3513h2_bfa337485184_8d7351bd871b

first seen 2026-07-06 10:28 · last seen 2026-09-14 11:35 · JSON

Last 7 days (1 observations)

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 count35
Extension count13
ALPNh2
Ciphers002f, 0033, 0035, 0039, 003c, 003d, 0067, 006b, 009c, 009d, 009e, 009f, 1301, 1302, 1303, 1304, c009, c00a, c013, c014, c023, c027, c02b, c02c, c02f, c030, c09c, c09d, c09e, c09f, c0ac, c0ad, cca8, cca9, ccaa
Extensions000a, 000b, 000d, 0016, 0017, 001b, 002b, 002d, 0031, 0033, ff01
Signature algorithms0904, 0905, 0906, 0403, 0503, 0603, 0807, 0808, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0301
JA4_rt13d3513h2_002f,0033,0035,0039,003c,003d,0067,006b,009c,009d,009e,009f,1301,1302,1303,1304,c009,c00a,c013,c014,c023,c027,c02b,c02c,c02f,c030,c09c,c09d,c09e,c09f,c0ac,c0ad,cca8,cca9,ccaa_000a,000b,000d,0016,0017,001b,002b,002d,0031,0033,ff01_0904,0905,0906,0403,0503,0603,0807,0808,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301
JA4_o (sample)t13d3513h2_f8a84e837758_5cc6710dfadd
JA4_ro (sample)t13d3513h2_1302,1303,1301,1304,c02c,c030,cca9,cca8,c0ad,c02b,c02f,c0ac,c023,c027,c00a,c014,c009,c013,009d,c09d,009c,c09c,003d,003c,0035,002f,009f,ccaa,c09f,009e,c09e,006b,0067,0039,0033_ff01,0000,000b,000a,0010,0016,0017,0031,000d,002b,002d,0033,001b_0904,0905,0906,0403,0503,0603,0807,0808,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301

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.8

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.8

TCP SYN (p0f)

fingerprintco-occurrences
4:53+11:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:03
4:54+10:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:45+19:0:1340:mss*48,10:mss,sok,ts,nop,ws:df,id+:01
4:53+11:0:1452:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
6:244+11:0:1432:mss*45,10:mss,sok,ts,nop,ws:flow:01
6:44+20:0:1320:65535,12:mss,nop,ws,sok,ts::01

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-4-8-1-3_1380_103
64240_2-4-8-1-3_1460_101
64320_2-4-8-1-3_1340_101
64440_2-4-8-1-3_1432_101
65535_2-1-3-4-8_1320_121
64240_2-4-8-1-3_1452_101

User-Agent

fingerprintco-occurrences
curl/8.18.04
curl/8.15.03
curl/8.20.01

Country

fingerprintco-occurrences
US · United States3
AU · Australia1
DE · Germany1
GB · United Kingdom1
ES · Spain1
CY · Cyprus1

Network (ASN)

fingerprintco-occurrences
AS19318 · Interserver, Inc2
AS57169 · EDIS GmbH1
AS136557 · Host Universal Pty Ltd1
AS3352 · TELEFONICA DE ESPANA S.A.U.1
AS3320 · Deutsche Telekom AG1
AS206067 · Hutchison 3G UK Limited1
AS3737 · PenTeleData Inc.1