TLS ClientHello (JA4)

t13d1714h2_5b57614c22b0_53a6d0ab1c42

first seen 2026-06-17 10:20 · last seen 2026-10-29 09:40 · 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 count17
Extension count14
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9
Extensions0005, 000a, 000b, 000d, 0012, 0017, 001c, 0022, 002b, 0033, fe0d, ff01
Signature algorithms0403, 0503, 0603, 0804, 0805, 0806, 0401, 0501, 0601, 0203, 0201
JA4_rt13d1714h2_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001c,0022,002b,0033,fe0d,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201
JA4_o (sample)t13d1714h2_5b234860e130_5457e2c43124
JA4_ro (sample)t13d1714h2_1301,1303,1302,c02b,c02f,cca9,cca8,c02c,c030,c00a,c009,c013,c014,009c,009d,002f,0035_0000,0017,ff01,000a,000b,0010,0005,0022,0012,0033,002b,000d,001c,fe0d_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201

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
ge20nr11enus_187a9385d229_000000000000_00000000000016
ge20nr12enus_a4e537ffe33a_000000000000_00000000000010
ge20nr12enus_a72b71f519fc_000000000000_0000000000009
ge20nn12enus_a72b71f519fc_000000000000_0000000000003
ge20nr13enus_44e1f6d71293_000000000000_0000000000003

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +31 more.The fingerprint page shows the full measured match list. More on the catalog.23
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.7
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +12 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 155.0, firefox 154.0, +3 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:131072;5:16384|12517377|11:0:0:42|m,p,a,s2
1:65536;2:0;4:131072;5:16384|12517377|13:0:0:42|m,p,a,s2
1:65536;2:0;4:131072;5:16384|12517377|9:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|17:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|19:0:0:42|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
4:55+9:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:06
4:54+10:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:06
4:112+16:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:04
4:46+18:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:03
4:49+15:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:03
4:51+13:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:03
4:50+14:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:03
6:45+19:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:03
4:45+19:0:1460:32768,10:mss,nop,ws,sok,ts::02
4:47+17:0:1380:mss*44,10:mss,sok,ts,nop,ws:df,id+:02

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_1017
64240_2-1-3-1-1-4_1460_87
64800_2-4-8-1-3_1440_103
64240_2-4-8-1-3_1380_102
65520_2-4-8-1-3_1260_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.028
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.06
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.04
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:147.0) Gecko/20100101 Firefox/147.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.01
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:146.0) Gecko/20100101 Firefox/146.01

Country

fingerprintco-occurrences
CA · Canada12
AU · Australia11
US · United States4
NL · Netherlands3
SI · Slovenia3
FR · France2
DK · Denmark2
NO · Norway1
CH · Switzerland1
BG · Bulgaria1

Network (ASN)

fingerprintco-occurrences
AS38195 · Superloop11
AS209854 · Cyberzone S.A.9
AS6128 · Cablevision Systems Corp.4
AS395965 · Carrytel3
AS34779 · T-2, d.o.o.3
AS215125 · Church of Cyberology2
AS208172 · Proton AG2
AS3292 · TDC Holding A/S2
AS50304 · Blix Solutions AS1
AS61125 · SABOTAGE LLC1

TLS supported groups

fingerprintco-occurrences
001d,0017,0018,0019,0100,01012

Cross-transport links

TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).

fingerprintlinked observations
q13d0313h3_55b375c5d22e_fc7519ff7bc212
q13d0315h3_55b375c5d22e_dc5437974b472
q13d0314h3_55b375c5d22e_1ecea7cb6ec11