TLS ClientHello (JA4)

t13d1011h2_18ef40b21276_879711aa9f16

first seen 2026-06-15 10:59 · last seen 2026-10-26 07:15 · JSON

Last 7 days (6 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 count10
Extension count11
ALPNh2
Ciphers1301, 1302, 1303, c027, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0403, 0503, 0603, 0804, 0805, 0806, 0401, 0501, 0601
JA4_rt13d1011h2_1301,1302,1303,c027,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0017,0023,002b,002d,0033,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601
JA4_o (sample)t13d1011h2_ab8fbf276f61_ae5a1c7fd8e7
JA4_ro (sample)t13d1011h2_1301,1302,1303,c02c,c030,cca9,cca8,c02b,c02f,c027_0000,0017,ff01,000a,000b,0023,0010,000d,0033,002d,002b_0403,0503,0603,0804,0805,0806,0401,0501,0601

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
ge20nn14enus_068ebe3632ec_000000000000_00000000000039
po20nn15enus_6175c8d80ef7_000000000000_00000000000014
po20nn23enus_91c53b5c6d06_000000000000_00000000000013
po20nn15enus_bef4d4356c13_000000000000_0000000000009

HTTP/2 frames (Akamai)

fingerprintco-occurrences
0|00|0|m,s,a,p75

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:016
4:51+13:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:015
4:46+18:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:014
4:49+15:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:012
4:50+14:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:08
4:48+16:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:04
4:53+11:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:02
4:54+10:0:1460:mss*30,12:mss,sok,ts,nop,ws:df,id+,ts2+:02
4:49+15:0:1460:mss*30,12:mss,sok,ts,nop,ws:df,id+,ts2+:01
4:50+14:0:1460:mss*30,12:mss,sok,ts,nop,ws:df,id+,ts2+:01

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_1234
43440_2-4-8-1-3_1460_124

User-Agent

fingerprintco-occurrences
curl/8.7.153
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.3622

Country

fingerprintco-occurrences
FR · France75

Network (ASN)

fingerprintco-occurrences
AS211590 · Bucklog SARL75

TLS supported groups

fingerprintco-occurrences
001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog.9