TLS ClientHello (JA4)

t13d1312h2_f57a46bbacb6_ab7e3b40a677

first seen 2026-06-11 16:12 · last seen 2026-11-02 11:08 · JSON

Last 7 days (31 observations)

Distinct clients per day (last 30 days, peak 35/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 count13
Extension count12
ALPNh2
Ciphers1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9
Extensions0005, 000a, 000b, 000d, 0012, 0017, 002b, 0032, 0033, ff01
Signature algorithms0804, 0403, 0807, 0805, 0806, 0401, 0501, 0601, 0503, 0603
JA4_rt13d1312h2_1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,002b,0032,0033,ff01_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603
JA4_o (sample)t13d1312h2_45672f90a73c_1b1d6b47de61
JA4_ro (sample)t13d1312h2_c02b,c02f,c02c,c030,cca9,cca8,c009,c013,c00a,c014,1301,1302,1303_0000,000b,ff01,0017,0012,0005,000a,000d,0032,0010,002b,0033_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603

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
ge20nr020000_fb4f949fd323_000000000000_00000000000080
ge20nr020000_b89ce445e0b3_000000000000_00000000000048
ge20nn04enus_39a3ba4480e8_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog.46
ge20nn030000_ff50983941c1_000000000000_00000000000035
ge20nr030000_0db47b7d240d_000000000000_00000000000019
ge20nr030000_ff50983941c1_000000000000_00000000000013
ge20nn020000_fb4f949fd323_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.9, powershell 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.13
ge20nn030000_80b089f68b8e_000000000000_00000000000012
ge20nn04enus_ded3c6d8f0eb_000000000000_00000000000011
ge20nr030000_80b089f68b8e_000000000000_0000000000009

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog.682
2:0;4:4194304;5:16384;6:65856|1073741824|0|a,m,p,s11
2:0;4:4194304;5:16384;6:1048896|1073741824|0|a,m,p,s3

TCP SYN (p0f)

fingerprintco-occurrences
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:073
4:57+7:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:048
4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:044
4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:023
4:52+12:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:019
4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:016
4:57+7:0:1420:mss*46,7:mss,sok,ts,nop,ws:df,id+:014
4:120+8:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:014
4:44+20:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:013
4:111+17:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+:010

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_7222
7300_2-4-8-1-3_1460_1063
65535_2-1-3-1-1-4_1460_853
65535_2-1-3-1-1-4_1440_837
64240_2-1-3-1-1-4_1460_826
42340_2-4-8-1-3_1440_722
65535_2-1-3-1-1-4_1412_819
64800_2-4-8-1-3_1440_715
64240_2-4-8-1-3_1460_1014
65535_2-1-3-1-1-4_1452_814

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36139
curl/7.74.084
Go-http-client/2.058
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.033
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.3633
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 Edg/124.0.0.030
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.3628
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.3624
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.3619
DuckDuckBot/1.0; (+http://duckduckgo.com/duckduckbot.html)18

Country

fingerprintco-occurrences
NL · Netherlands143
US · United States107
BR · Brazil59
DE · Germany57
ID · Indonesia56
SG · Singapore50
SE · Sweden46
MX · Mexico24
IN · India24
JP · Japan22

Network (ASN)

fingerprintco-occurrences
AS45102 · Alibaba (US) Technology Co., Ltd.84
AS213438 · ColocaTel Inc.72
AS197170 · TechTies Inc.54
AS203861 · Miteflux Technologies Ltd41
AS8075 · Microsoft Corporation37
AS16509 · Amazon.com, Inc.28
AS31898 · Oracle Corporation25
AS139742 · PT Ryndo Jaringan Nusantara23
AS396982 · Google LLC17
AS24940 · Hetzner Online GmbH14

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog.66
11ec,11eb,11ed,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.27.3, go-net/http 1.26.10.The fingerprint page shows the full measured match list. More on the catalog.50
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.2