TLS ClientHello (JA4)

t13d1312h2_f57a46bbacb6_ab7e3b40a677

first seen 2026-06-11 16:12 · last seen 2026-09-16 08:15 · JSON

Matches controlled captures

Known clients driven through this site's own edge produced this exact fingerprint — measured truth, not inference. catalog →

go-net/http 1.26.8 · Alpine Linux 3.24.1 · container — 1 session, last 2026-09-02 21:25 controlled
go-net/http 1.26.7 · Alpine Linux 3.24.1 · container — 1 session, last 2026-08-19 21:01 controlled
go-net/http 1.25.14 · Alpine Linux 3.24.1 · container — 1 session, last 2026-08-19 21:01 controlled
go-net/http 1.26.6 · Alpine Linux 3.24.1 · container — 2 sessions, last 2026-08-18 09:56 controlled
go-net/http 1.25.13 · Alpine Linux 3.24.1 · container — 1 session, last 2026-08-18 09:08 controlled
go-net/http 1.26.5 · Alpine Linux 3.24.1 · container — 1 session, last 2026-08-01 00:16 controlled
go-net/http 1.26.4 · Alpine Linux 3.24.1 · container — 1 session, last 2026-07-01 22:43 controlled
go-net/http 1.25.11 · Alpine Linux 3.24.1 · container — 1 session, last 2026-07-01 22:42 controlled

Inconsistencies

User-Agents observed with this fingerprint that contradict what it proves at the wire. all inconsistencies →

fingerprint User-Agent claims wire shows confidence seen first seen last seen

t13d1312h2_f57a46bbacb6_ab7e3b40a677

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleW…

User-Agent claims Chrome 152.0.0.0

TLS cipher list matches no measured Chrome capture

The offered TLS cipher suites match no controlled capture of Chrome. Cipher lists are very stable per browser, so a different one is a real inconsistency — though a TLS-inspecting proxy re-originating the handshake is an honest cause, which holds this at medium.

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36
Claimed version	152.0.0.0
Measured versions	151.0.7922.174, 149.0.7827.103, 149.0.7827.53, 149.0.7827.115, 149.0.7827.114, 153.0.8010.47, 149.0.7827.54, 149.0.7827.201, 150.0.7871.187, 153.0.8010.36, 151.0.7922.170, 152.0.7977.83, 152.0.7977.82, 152.0.7977.65, 150.0.7871.114, 150.0.7871.115, 150.0.7871.129, 151.0.7922.72, 151.0.7922.137, 152.0.7977.75, 151.0.7922.173, 149.0.7827.102, 149.0.7827.156, 151.0.7922.71, 150.0.7871.128, 151.0.7922.108, 149.0.7827.155, 150.0.7871.125, 150.0.7871.46, 151.0.7922.109, 152.0.7977.64, 148.0.7778.179, 149.0.7827.200
Layer	cipher suites differ
JA4 label	unlabeled

medium

2026-09-05

Last 7 days (17 observations)

Distinct clients per day (last 30 days, peak 10/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

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`13`
Extension count	`12`
ALPN	`h2`
Ciphers	`1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0017, 002b, 0032, 0033, ff01`
Signature algorithms	`0804, 0403, 0807, 0805, 0806, 0401, 0501, 0601, 0503, 0603`
JA4_r	`t13d1312h2_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)

fingerprint	co-occurrences
`ge20nr020000_fb4f949fd323_000000000000_000000000000`	73
`ge20nr020000_b89ce445e0b3_000000000000_000000000000`	31
`ge20nr030000_0db47b7d240d_000000000000_000000000000`	19
`ge20nn030000_ff50983941c1_000000000000_000000000000`	15
`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.	11
`ge20nn020000_fb4f949fd323_000000000000_000000000000`	10
`ge20nn020000_b89ce445e0b3_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.0, go-net/http 1.26.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog.	5
`he20nn010000_a510e5066512_000000000000_000000000000`	4
`ge20nr030000_ff50983941c1_000000000000_000000000000`	4
`ge20nr030000_b74f9ffb1cea_000000000000_000000000000`	3

HTTP/2 frames (Akamai)

fingerprint	co-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 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.	259
`2:0;4:4194304;5:16384;6:1048896\|1073741824\|0\|a,m,p,s`	3

TCP SYN (p0f)

fingerprint	co-occurrences
`4:52+12:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	19
`4:57+7:0:1420:mss*46,7:mss,sok,ts,nop,ws:df,id+:0`	14
`4:120+8:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0`	13
`4:44+20:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	13
`4:51+13:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	9
`4:54+10:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	9
`4:111+17:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0`	9
`4:50+14:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	8
`4:45+19:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	6
`4:51+13:0:1460:mss*5,10:mss,sok,ts,nop,ws:df,id+,ecn:0`	6

TCP SYN (JA4T)

fingerprint	co-occurrences
`7300_2-4-8-1-3_1460_10`	63
`65535_2-1-3-1-1-4_1460_8`	18
`64240_2-1-3-1-1-4_1460_8`	14
`65535_2-1-3-1-1-4_1440_8`	14
`64240_2-4-8-1-3_1460_10`	14
`65320_2-4-8-1-3_1420_7`	11
`42340_2-4-8-1-3_1440_7`	11
`64240_2-4-8-1-3_1460_7`	8
`62727_2-4-8-1-3_1460_7`	8
`65280_2-4-8-1-3_1280_10`	8

User-Agent

fingerprint	co-occurrences
`curl/7.74.0`	84
`Go-http-client/2.0`	41
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36`	32
`DuckDuckBot/1.0; (+http://duckduckgo.com/duckduckbot.html)`	11
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36`	9
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) Chrome/120.0.0.0`	8
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36`	7
`Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)`	5
`Mozilla/5.0 (compatible; FacebookExternalHit/1.1; +http://www.facebook.com/externalhit_uatext.php)`	5
`Mozilla/5.0 (compatible; pathscan/1.0)`	4

Country

fingerprint	co-occurrences
`US` · United States	79
`DE` · Germany	39
`SG` · Singapore	35
`NL` · Netherlands	19
`MY` · Malaysia	18
`JP` · Japan	14
`BR` · Brazil	14
`CN` · China	10
`PH` · Philippines	6
`IN` · India	6

Network (ASN)

fingerprint	co-occurrences
`AS45102` · Alibaba (US) Technology Co., Ltd.	84
`AS16509` · Amazon.com, Inc.	18
`AS396982` · Google LLC	17
`AS31898` · Oracle Corporation	15
`AS8075` · Microsoft Corporation	11
`AS204770` · UAB Cherry Servers	9
`AS4134` · CHINANET BACKBONE	9
`AS48090` · TECHOFF SRV LIMITED	8
`AS197170` · TechTies Inc.	6
`AS24940` · Hetzner Online GmbH	5