TLS ClientHello (JA4)

t13d1617h2_86a278354501_3cbfd9057e0d

first seen 2026-06-12 06:58 · last seen 2026-10-31 11:40 · JSON

Matches controlled captures

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

firefox 153.0 · macOS 26.5.2 · via geckodriver · ci — 9 sessions, last 2026-09-01 01:04 controlled
firefox 153.0 · macOS 15.7.7 · via geckodriver · ci — 9 sessions, last 2026-09-01 01:03 controlled
firefox 153.0 · Ubuntu 24.04 · via playwright · container — 4 sessions, last 2026-09-01 00:56 controlled
firefox 153.0.4 · Ubuntu 24.04 · via geckodriver · ci — 4 sessions, last 2026-08-26 06:54 controlled
firefox 153.0.3 · Ubuntu 24.04 · via geckodriver · ci — 5 sessions, last 2026-08-18 12:26 controlled
firefox 153.0.3 · Windows 10.0.26100.33158 · via geckodriver · ci — 4 sessions, last 2026-08-18 12:26 controlled
firefox 150.0.2 · Ubuntu 24.04 · via playwright · container — 2 sessions, last 2026-08-18 09:19 controlled
firefox 153.0.1 · Windows 10.0.26100.33158 · via geckodriver · ci — 1 session, last 2026-08-03 21:00 controlled
firefox 152.0.6 · macOS 26.4 · via geckodriver · ci — 2 sessions, last 2026-08-01 00:39 controlled
firefox 152.0.6 · Ubuntu 24.04 · via geckodriver · ci — 2 sessions, last 2026-08-01 00:33 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

t13d1617h2_86a278354501_3cbfd9057e0d

Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.…

User-Agent claims Chrome 151.0.0.0

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 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36
Claimed version	151.0.0.0
Measured versions	149.0.7827.103, 149.0.7827.53, 149.0.7827.115, 153.0.8010.47, 149.0.7827.54, 155.0.8059.79, 153.0.8010.36, 151.0.7922.170, 156.0.8078.48, 152.0.7977.82, 152.0.7977.65, 156.0.8078.73, 156.0.8078.74, 155.0.8059.84, 150.0.7871.129, 155.0.8059.40, 154.0.8037.58, 151.0.7922.173, 149.0.7827.156, 151.0.7922.71, 150.0.7871.128, 154.0.8037.97, 149.0.7827.155, 151.0.7922.109, 152.0.7977.64, 156.0.8078.79, 149.0.7827.200, 151.0.7922.174, 153.0.8010.53, 149.0.7827.114, 154.0.8037.57, 149.0.7827.201, 150.0.7871.187, 152.0.7977.83, 153.0.8010.52, 150.0.7871.114, 155.0.8059.39, 150.0.7871.115, 151.0.7922.72, 151.0.7922.137, 152.0.7977.75, 154.0.8037.92, 156.0.8078.47, 149.0.7827.102, 151.0.7922.108, 150.0.7871.125, 150.0.7871.46, 148.0.7778.179
Layer	cipher suites differ
JA4 label	unlabeled

medium

2026-08-28

Last 7 days (72 observations)

Distinct clients per day (last 30 days, peak 2/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	`16`
Extension count	`17`
ALPN	`h2`
Ciphers	`002f, 0035, 009c, 009d, 1301, 1302, 1303, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0017, 001b, 001c, 0022, 0023, 002b, 002d, 0033, fe0d, ff01`
Signature algorithms	`0403, 0503, 0603, 0804, 0805, 0806, 0401, 0501, 0601, 0203, 0201`
JA4_r	`t13d1617h2_002f,0035,009c,009d,1301,1302,1303,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,001c,0022,0023,002b,002d,0033,fe0d,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201`
JA4_o (sample)	`t13d1617h2_d6294ab6b85e_df135d36b6d5`
JA4_ro (sample)	`t13d1617h2_1301,1303,1302,c02b,c02f,cca9,cca8,c02c,c030,c00a,c013,c014,009c,009d,002f,0035_0000,0017,ff01,000a,000b,0023,0010,0005,0022,0012,0033,002b,000d,002d,001c,001b,fe0d_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201`

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)

fingerprint	co-occurrences
`ge20nr10enus_b3034183f430_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +28 more.The fingerprint page shows the full measured match list. More on the catalog.	143
`ge20nr11enus_3901d4197baf_000000000000_000000000000`	95
`ge20nn11enus_3901d4197baf_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 153.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.	89
`ge20nn11ruru_3901d4197baf_000000000000_000000000000`	32
`ge20nr12enus_979a40433f82_000000000000_000000000000`	27
`ge20nr10ruru_b3034183f430_000000000000_000000000000`	26
`ge20nr11enus_187a9385d229_000000000000_000000000000`	23
`ge20nn030000_ff50983941c1_000000000000_000000000000`	23
`ge20nr13deat_9e2b86631664_000000000000_000000000000`	21
`ge20nr13enus_016d87568c43_000000000000_000000000000`	20

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:65536;2:0;4:131072;5:16384\|12517377\|3:0:0:42\|m,p,a,s` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.	455
`1:65536;2:0;4:131072;5:16384\|12517377\|3:0:0:22\|m,p,a,s` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +32 more.The fingerprint page shows the full measured match list. More on the catalog.	170
`1:65536;2:0;4:131072;5:16384\|12517377\|5:0:0:22\|m,p,a,s` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +13 more.The fingerprint page shows the full measured match list. More on the catalog.	53
`1:65536;2:0;4:131072;5:16384\|12517377\|7:0:0:22\|m,p,a,s` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 158.0.1, firefox 155.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog.	33
`1:65536;2:0;4:131072;5:16384\|12517377\|5:0:0:42\|m,p,a,s`	31
`1:65536;2:0;4:131072;5:16384\|12517377\|1:0:0:22\|m,p,a,s`	30
`1:65536;2:0;4:131072;5:16384\|12517377\|11:0:0:42\|m,p,a,s`	26
`1:65536;2:0;4:131072;5:16384\|12517377\|9:0:0:42\|m,p,a,s`	22
`1:65536;2:0;4:131072;5:16384\|12517377\|7:0:0:42\|m,p,a,s`	19
`1:65536;2:0;4:131072;5:16384\|12517377\|13:0:0:42\|m,p,a,s`	15

TCP SYN (p0f)

fingerprint	co-occurrences
`4:115+13:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0`	71
`4:53+11:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:0`	46
`4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	41
`4:50+14:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	36
`4:117+11:0:1334:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0`	24
`4:112+16:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0`	20
`6:242+13:0:1440:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:flow:0`	15
`4:111+17:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0`	15
`4:51+13:0:1460:65535,6:mss,nop,ws,sok,ts:df,id+:0`	15
`4:43+21:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	14

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-1-3-1-1-4_1460_8`	129
`65535_2-1-3-1-1-4_1460_8`	108
`64240_2-4-8-1-3_1460_10`	76
`64240_2-4-8-1-3_1460_7`	68
`64860_2-4-8-1-3_1380_10`	52
`64240_2-4-8-1-3_1412_10`	28
`64240_2-1-3-1-1-4_1452_8`	27
`64240_2-1-3-1-1-4_1334_8`	24
`65535_2-1-3-4-8_1460_6`	20
`65535_2-1-3-1-1-4_1452_8`	20

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (X11; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0`	158
`Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0`	143
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0`	136
`Mozilla/5.0 (Android 14; Mobile; rv:153.0) Gecko/153.0 Firefox/153.0`	110
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0`	98
`Mozilla/5.0 (Android 13; Mobile; rv:153.0) Gecko/153.0 Firefox/153.0`	86
`Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0`	39
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.0`	35
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:152.0) Gecko/20100101 Firefox/152.0`	32
`Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0`	31

Country

fingerprint	co-occurrences
`US` · United States	139
`NL` · Netherlands	83
`HU` · Hungary	71
`CY` · Cyprus	46
`RU` · Russia	43
`FR` · France	35
`CH` · Switzerland	33
`AU` · Australia	32
`DE` · Germany	30
`VN` · Vietnam	30

Network (ASN)

fingerprint	co-occurrences
`AS5483` · Magyar Telekom Plc.	71
`AS57169` · EDIS GmbH	46
`AS23889` · Mauritius Telecom Ltd	28
`AS701` · Verizon Business	27
`AS50673` · Serverius	24
`AS219064` · Akenai Products LTD	21
`AS22616` · ZSCALER, INC.	20
`AS134090` · Leaptel	20
`AS214790` · Brainoza OU	20
`AS7018` · AT&T Enterprises, LLC	18

TLS supported groups

fingerprint	co-occurrences
`11ec,001d,0017,0018,0019,0100,0101`	85

Cross-transport links

TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).

fingerprint	linked observations
`q13d0315h3_55b375c5d22e_dc5437974b47`	62