TLS ClientHello (JA4)

t13d181000_5d04281c6031_25d8bb11352d

first seen 2026-10-21 11:41 · last seen 2026-10-26 15:39 · 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 count18
Extension count10
ALPN00
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c013, c014, c027, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601, 0807, 0603, 0201
JA4_rt13d181000_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c027,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601,0807,0603,0201
JA4_o (sample)t13d181000_04134bd58ce0_8adf7792cb11
JA4_ro (sample)t13d181000_1301,1302,1303,c02f,c02b,c030,c02c,c027,cca9,cca8,c009,c013,c00a,c014,009c,009d,002f,0035_0000,0017,ff01,000a,000b,0023,000d,0033,002d,002b_0403,0804,0401,0503,0805,0501,0806,0601,0807,0603,0201

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
ge11nn050000_2469c960a647_000000000000_0000000000003

TCP SYN (p0f)

fingerprintco-occurrences
4:47+17:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:01
6:241+14:0:1220:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:ecn,flow:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_101
65535_2-1-3-1-1-8-4-0-0_1460_61
65535_2-1-3-1-1-8-4-0-0_1220_61

User-Agent

fingerprintco-occurrences
Claude-User (claude-code/2.1.304; +https://support.anthropic.com/)1
Claude-User (claude-code/2.1.306; +https://support.anthropic.com/)1
Claude-User (claude-code/2.1.310; +https://support.anthropic.com/)1

Country

fingerprintco-occurrences
DE · Germany1
FR · France1
IL · Israel1

Network (ASN)

fingerprintco-occurrences
AS3320 · Deutsche Telekom AG1
AS12322 · Free SAS1
AS12400 · Partner Communications Ltd.1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.3