TLS ClientHello (JA4)

t13d1614h2_86a278354501_3dd24b5ebec4

first seen 2026-06-11 08:56 · last seen 2026-09-16 13:50 · 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

t13d1614h2_86a278354501_3dd24b5ebec4

Mozilla/5.0 (Android 10; Mobile; rv:153.0) Gecko…

User-Agent claims Firefox 153.0

TLS extensions or signature algorithms differ from every measured Firefox capture

The cipher suites match Firefox, but the extension set or signature algorithms differ from every capture even after normalizing handshake-variant extensions. Most likely a field-trial, ECH, or build variant the catalog has not captured; occasionally mimicry. This sharpens as catalog coverage grows.

Full User-Agent	Mozilla/5.0 (Android 10; Mobile; rv:153.0) Gecko/153.0 Firefox/153.0
Claimed version	153.0
Measured versions	146.0.1, 152.0.1, 154.0, 140.0.2, 151.0.4, 151.0.2, 139.0, 153.0.1, 155.0, 152.0.5, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 132.0, 152.0.3, 148.0.2, 137.0, 141.0, 155.0.1, 153.0, 151.0.3, 144.0.2, 154.0.1, 134.0, 152.0.4, 151.0
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-09-16

t13d1614h2_86a278354501_3dd24b5ebec4

Mozilla/5.0 (Android 16; Mobile; rv:151.0) Gecko…

User-Agent claims Firefox 151.0

TLS extensions or signature algorithms differ from every measured Firefox capture

Full User-Agent	Mozilla/5.0 (Android 16; Mobile; rv:151.0) Gecko/151.0 Firefox/151.0
Claimed version	151.0
Measured versions	146.0.1, 152.0.1, 154.0, 140.0.2, 151.0.4, 151.0.2, 139.0, 153.0.1, 155.0, 152.0.5, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 132.0, 152.0.3, 148.0.2, 137.0, 141.0, 155.0.1, 153.0, 151.0.3, 144.0.2, 154.0.1, 134.0, 152.0.4, 151.0
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-06-11

t13d1614h2_86a278354501_3dd24b5ebec4

Mozilla/5.0 (Android 17; Mobile; rv:152.0) Gecko…

User-Agent claims Firefox 152.0

TLS extensions or signature algorithms differ from every measured Firefox capture

Full User-Agent	Mozilla/5.0 (Android 17; Mobile; rv:152.0) Gecko/152.0 Firefox/152.0
Claimed version	152.0
Measured versions	146.0.1, 152.0.1, 154.0, 140.0.2, 151.0.4, 151.0.2, 139.0, 153.0.1, 155.0, 152.0.5, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 132.0, 152.0.3, 148.0.2, 137.0, 141.0, 155.0.1, 153.0, 151.0.3, 144.0.2, 154.0.1, 134.0, 152.0.4, 151.0
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-07-14

t13d1614h2_86a278354501_3dd24b5ebec4

Mozilla/5.0 (Android 11; Mobile; rv:152.0) Gecko…

User-Agent claims Firefox 152.0

TLS extensions or signature algorithms differ from every measured Firefox capture

Full User-Agent	Mozilla/5.0 (Android 11; Mobile; rv:152.0) Gecko/152.0 Firefox/152.0
Claimed version	152.0
Measured versions	146.0.1, 152.0.1, 154.0, 140.0.2, 151.0.4, 151.0.2, 139.0, 153.0.1, 155.0, 152.0.5, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 132.0, 152.0.3, 148.0.2, 137.0, 141.0, 155.0.1, 153.0, 151.0.3, 144.0.2, 154.0.1, 134.0, 152.0.4, 151.0
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-07-22

Last 7 days (7 observations)

Decomposed attributes

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`16`
Extension count	`14`
ALPN	`h2`
Ciphers	`002f, 0035, 009c, 009d, 1301, 1302, 1303, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0017, 001b, 001c, 0022, 002b, 0033, fe0d, ff01`
Signature algorithms	`0403, 0503, 0603, 0804, 0805, 0806, 0401, 0501, 0601, 0203, 0201`
JA4_r	`t13d1614h2_002f,0035,009c,009d,1301,1302,1303,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0017,001b,001c,0022,002b,0033,fe0d,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201`
JA4_o (sample)	`t13d1614h2_d6294ab6b85e_403aca0f5b17`
JA4_ro (sample)	`t13d1614h2_1301,1303,1302,c02b,c02f,cca9,cca8,c02c,c030,c00a,c013,c014,009c,009d,002f,0035_0000,0017,ff01,000a,000b,0010,0005,0022,0033,002b,000d,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
`ge20nr12enus_a4e537ffe33a_000000000000_000000000000`	3
`ge20nr11enus_187a9385d229_000000000000_000000000000`	3
`ge20nr11ru00_187a9385d229_000000000000_000000000000`	2
`ge20nr12ru00_a72b71f519fc_000000000000_000000000000`	2
`ge20nr11ru00_684b26f0fcdf_000000000000_000000000000`	2
`ge20nr13enus_47bedc02e943_000000000000_000000000000`	1
`ge20nn12enus_26af5f949fc0_000000000000_000000000000`	1
`ge20nn12enus_a72b71f519fc_000000000000_000000000000`	1
`ge20nn11ru00_684b26f0fcdf_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:4096;2:0;4:32768;5:16384\|12517377\|3:0:0:22\|m,p,a,s`	8
`1:4096;2:0;4:32768;5:16384\|12517377\|3:0:0:42\|m,p,a,s`	4
`1:4096;2:0;4:32768;5:16384\|12517377\|5:0:0:42\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|9:0:0:42\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|11:0:0:42\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|7:0:0:42\|m,p,a,s`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`6:49+15:0:1440:32768,10:mss,nop,ws,sok,ts:flow:0`	7
`4:48+16:0:1380:65535,9:mss,nop,ws,sok,ts:df,id+:0`	4
`4:48+16:0:1360:65535,9:mss,sok,ts,nop,ws:df,id+:0`	3
`4:44+20:0:1460:65535,8:mss,sok,ts,nop,ws:df,id+:0`	1
`4:241+14:0:1420:mss*42,8:mss,nop,ws,sok,ts:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`32768_2-1-3-4-8_1440_10`	7
`65535_2-4-8-1-3_1360_9`	3
`59640_2-1-3-4-8_1420_8`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Android 10; Mobile; rv:153.0) Gecko/153.0 Firefox/153.0`	7
`Mozilla/5.0 (Android 16; Mobile; rv:151.0) Gecko/151.0 Firefox/151.0`	5
`Mozilla/5.0 (Android 17; Mobile; rv:152.0) Gecko/152.0 Firefox/152.0`	3
`Mozilla/5.0 (Android 11; Mobile; rv:152.0) Gecko/152.0 Firefox/152.0`	1

Country

fingerprint	co-occurrences
`NL` · Netherlands	7
`AU` · Australia	5
`IL` · Israel	3
`FR` · France	1

Network (ASN)

fingerprint	co-occurrences
`AS215125` · Church of Cyberology	7
`AS133612` · Vodafone Australia Pty Ltd	4
`AS1680` · Cellcom Fixed Line Communication L.P	3
`AS38195` · Superloop	1
`AS15557` · Societe Francaise Du Radiotelephone - SFR SA	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
`q13d0315h3_55b375c5d22e_dc5437974b47`	1

fingerprint	co-occurrences
`1:4096;2:0;4:32768;5:16384\|12517377\|3:0:0:22\|m,p,a,s`	8
`1:4096;2:0;4:32768;5:16384\|12517377\|3:0:0:42\|m,p,a,s`	4
`1:4096;2:0;4:32768;5:16384\|12517377\|5:0:0:42\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|9:0:0:42\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|11:0:0:42\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|7:0:0:42\|m,p,a,s`	1