TLS ClientHello (JA4)

t12d1106h2_8256d93fd366_151c0a07749b

first seen 2026-07-03 16:11 · last seen 2026-09-03 16:21 · JSON

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

t12d1106h2_8256d93fd366_151c0a07749b

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) …

User-Agent claims Chrome 149.0.0.0

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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36
Claimed version	149.0.0.0
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

2026-07-03

t12d1106h2_8256d93fd366_151c0a07749b

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) …

User-Agent claims Chrome 151.0.0.0

TLS cipher list matches no measured Chrome capture

Full User-Agent	Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36
Claimed version	151.0.0.0
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

2026-09-03

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

Protocol	`t (TLS over TCP)`
TLS version	`12`
SNI	`d (domain)`
Cipher count	`11`
Extension count	`6`
ALPN	`h2`
Ciphers	`002f, 0035, 009c, 009d, 00ff, c013, c014, c02b, c02c, c02f, c030`
Extensions	`000a, 000b, 000d, 0017`
Signature algorithms	`0601, 0603, 0501, 0503, 0401, 0403, 0201, 0203`
JA4_r	`t12d1106h2_002f,0035,009c,009d,00ff,c013,c014,c02b,c02c,c02f,c030_000a,000b,000d,0017_0601,0603,0501,0503,0401,0403,0201,0203`
JA4_o (sample)	`t12d1106h2_866afdadf1f6_5808030d8bb4`
JA4_ro (sample)	`t12d1106h2_c02c,c030,c02b,c02f,009d,009c,c014,c013,0035,002f,00ff_000d,0000,0017,000b,000a,0010_0601,0603,0501,0503,0401,0403,0201,0203`

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
`ge20nr12enus_54b4638ab28b_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, edge 151.0.4129.93, +36 more.The fingerprint page shows the full measured match list. More on the catalog.	3
`ge20nn13enus_9519c2577190_000000000000_000000000000`	2

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:4096;2:0;3:100;4:6291456;5:16384;6:65535\|2147418112\|1:0:0:256\|m,a,s,p`	2
`1:4096;2:0;3:100;4:6291456;5:16384;6:65535\|2147418112\|1:0:0:220\|m,a,s,p`	2
`1:4096;2:0;3:100;4:6291456;5:16384;6:65535\|2147418112\|3:0:0:220\|m,a,s,p`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:57+7:0:1260:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0`	4
`4:49+15:0:1350:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-8-4-0-0_1260_6`	4
`65535_2-1-3-1-1-8-4-0-0_1350_6`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36`	4
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`CA` · Canada	4
`US` · United States	1

Network (ASN)

fingerprint	co-occurrences
`AS394089` · Google LLC	4
`AS23018` · CareSource Management Group, Co.	1

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
`q13d0311h3_55b375c5d22e_653d80c3fe9d`	3

fingerprint	co-occurrences
`1:4096;2:0;3:100;4:6291456;5:16384;6:65535\|2147418112\|1:0:0:256\|m,a,s,p`	2
`1:4096;2:0;3:100;4:6291456;5:16384;6:65535\|2147418112\|1:0:0:220\|m,a,s,p`	2
`1:4096;2:0;3:100;4:6291456;5:16384;6:65535\|2147418112\|3:0:0:220\|m,a,s,p`	1