TLS ClientHello (JA4)

t13d1516h2_8daaf6152771_b8e3902375cf

first seen 2026-07-24 09:33 · last seen 2026-10-10 09:57 · 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 version13
SNId (domain)
Cipher count15
Extension count16
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02c, c02f, c030, cca8, cca9
Extensions0005, 000a, 000b, 000d, 0012, 0017, 001b, 0023, 002b, 002d, 0033, 4469, fe0d, ff01
Signature algorithms0403, 0804, 0401
JA4_rt13d1516h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,0023,002b,002d,0033,4469,fe0d,ff01_0403,0804,0401
JA4_o (sample)t13d1516h2_acb858a92679_e7eacf8c2c5a
JA4_ro (sample)t13d1516h2_1301,1302,1303,c02b,c02f,c02c,c030,cca9,cca8,c013,c014,009c,009d,002f,0035_ff01,0017,000d,001b,4469,fe0d,0023,002b,000a,000b,0012,0033,002d,0005,0000,0010_0403,0804,0401

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
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog.5
ge20nn12enus_60f823d07c94_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +57 more.The fingerprint page shows the full measured match list. More on the catalog.7

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1452:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:03
6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:01
4:45+19:0:1380:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:01
4:46+18:0:1380:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:01
4:50+14:0:1380:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-8-4-0-0_1452_63
65535_2-1-3-1-1-8-4-0-0_1380_63
64800_2-4-8-1-3_1440_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
TR · Turkey6
SE · Sweden1

Network (ASN)

fingerprintco-occurrences
AS9121 · Turk Telekomunikasyon Anonim Sirketi3
AS8386 · Vodafone Net Iletisim Hizmetler AS3
AS214379 · South Park Networks LLC1