TLS ClientHello (JA4)

t13d2013h1_a09f3c656075_7f0f34a4126d

first seen 2026-08-09 06:11 · last seen 2026-10-15 20:10 · 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

t13d2013h1_a09f3c656075_7f0f34a4126d

Mozilla/5.0 (iPhone; CPU iPhone OS 26_4 like Mac…

User-Agent claims Firefox 156.0

TLS cipher list matches no measured Firefox capture

The offered TLS cipher suites match no controlled capture of Firefox. 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 (iPhone; CPU iPhone OS 26_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/156.0 Mobile/15E148 Safari/604.1
Claimed version	156.0
Measured versions	146.0.1, 154.0, 140.0.2, 157.0.1, 151.0.2, 155.0, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 156.0.1, 132.0, 152.0.3, 141.0, 153.0, 151.0.3, 156.0, 152.0.4, 151.0, 152.0.1, 151.0.4, 139.0, 153.0.1, 158.0.1, 152.0.5, 157.0, 158.0, 148.0.2, 137.0, 155.0.1, 144.0.2, 154.0.1, 134.0
Layer	cipher suites differ
JA4 label	unlabeled

medium

2026-10-15

t13d2013h1_a09f3c656075_7f0f34a4126d

Mozilla/5.0 (iPhone; CPU iPhone OS 26_5_1 like M…

User-Agent claims Firefox 155.0

TLS cipher list matches no measured Firefox capture

Full User-Agent	Mozilla/5.0 (iPhone; CPU iPhone OS 26_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/155.0 Mobile/15E148 Safari/604.1
Claimed version	155.0
Measured versions	146.0.1, 154.0, 140.0.2, 157.0.1, 151.0.2, 155.0, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 156.0.1, 132.0, 152.0.3, 141.0, 153.0, 151.0.3, 156.0, 152.0.4, 151.0, 152.0.1, 151.0.4, 139.0, 153.0.1, 158.0.1, 152.0.5, 157.0, 158.0, 148.0.2, 137.0, 155.0.1, 144.0.2, 154.0.1, 134.0
Layer	cipher suites differ
JA4 label	unlabeled

medium

2026-10-15

t13d2013h1_a09f3c656075_7f0f34a4126d

Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like M…

User-Agent claims Firefox 156.0

TLS cipher list matches no measured Firefox capture

Full User-Agent	Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/156.0 Mobile/15E148 Safari/604.1
Claimed version	156.0
Measured versions	146.0.1, 154.0, 140.0.2, 157.0.1, 151.0.2, 155.0, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 156.0.1, 132.0, 152.0.3, 141.0, 153.0, 151.0.3, 156.0, 152.0.4, 151.0, 152.0.1, 151.0.4, 139.0, 153.0.1, 158.0.1, 152.0.5, 157.0, 158.0, 148.0.2, 137.0, 155.0.1, 144.0.2, 154.0.1, 134.0
Layer	cipher suites differ
JA4 label	unlabeled

medium

2026-10-15

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	`20`
Extension count	`13`
ALPN	`h1`
Ciphers	`000a, 002f, 0035, 009c, 009d, 1301, 1302, 1303, c008, c009, c00a, c012, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0017, 001b, 002b, 002d, 0033, ff01`
Signature algorithms	`0403, 0804, 0401, 0503, 0805, 0805, 0501, 0806, 0601, 0201`
JA4_r	`t13d2013h1_000a,002f,0035,009c,009d,1301,1302,1303,c008,c009,c00a,c012,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0805,0501,0806,0601,0201`
JA4_o (sample)	`t13d2013h1_09fdf58d427f_c4658de06264`
JA4_ro (sample)	`t13d2013h1_1302,1303,1301,c02c,c02b,cca9,c030,c02f,cca8,c00a,c009,c014,c013,009d,009c,0035,002f,c008,c012,000a_0000,0017,ff01,000a,000b,0010,0005,000d,0012,0033,002d,002b,001b_0403,0804,0401,0503,0805,0805,0501,0806,0601,0201`

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
`ge11nn09enus_f667795aa03b_000000000000_000000000000`	7
`ge11nn030000_fe444ad14866_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0, curl 7.88.1, curl 8.21.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.	3
`ge11nn11enus_67a5909b5a28_000000000000_000000000000`	3
`ge11nr06enus_cc6ec9a91856_000000000000_000000000000`	2
`ge11nr09enus_f667795aa03b_000000000000_000000000000`	2
`ge11nr06enus_a89d28968959_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:46+18:0:1452:65535,6:mss,sok,ts,nop,ws:df,id+:0`	2
`4:44+20:0:1440:65535,6:mss,sok,ts,nop,ws:df,id+:0`	2
`4:41+23:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:0`	1
`4:51+13:0:1452:65535,6:mss,sok,ts,nop,ws:df,id+:0`	1
`4:48+16:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:0`	1
`4:48+16:0:1440:65535,6:mss,sok,ts,nop,ws:df,id+:0`	1
`4:42+22:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:0`	1
`4:46+18:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:0`	1
`4:51+13:0:1400:65535,6:mss,sok,ts,nop,ws:df,id+:0`	1
`4:53+11:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-4-8-1-3_1460_6`	5
`65535_2-4-8-1-3_1452_6`	4
`65535_2-4-8-1-3_1440_6`	3
`65535_2-4-8-1-3_1400_6`	1
`64240_2-1-3-1-1-4_1412_8`	1
`65535_2-4-8-1-3_1450_6`	1
`65535_2-1-3-1-1-8-4-0-0_1272_6`	1
`65535_2-1-3-1-1-8-4-0-0_1249_6`	1
`65535_2-1-3-1-1-8-4-0-0_1317_6`	1

User-Agent

fingerprint	co-occurrences
`curl/8.21.0`	3
`Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Mobile/15E148 Safari/604.1`	2
`Mozilla/5.0 (iPhone; CPU iPhone OS 26_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/133.0.6943.99 Mobile/15E148 Safari/604.1`	2
`Mozilla/5.0 (iPhone; CPU iPhone OS 27 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/27 Mobile/15E148 Safari/604.1`	2
`Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Mobile/15E148 Safari/604.1`	1
`Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/151.0 Mobile/15E148 Safari/604.1`	1
`Mozilla/5.0 (iPhone; CPU iPhone OS 26_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.2 Mobile/15E148 Safari/604.1`	1
`Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.7 Mobile/15E148 Safari/604.1`	1
`Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/156.0 Mobile/15E148 Safari/604.1`	1
`Mozilla/5.0 (iPhone; CPU iPhone OS 26_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.4.2 Mobile/15E148 Safari/604.1`	1

Country

fingerprint	co-occurrences
`RU` · Russia	5
`BR` · Brazil	4
`AR` · Argentina	3
`KZ` · Kazakhstan	1
`IT` · Italy	1
`MA` · Morocco	1
`AE` · United Arab Emirates	1
`CO` · Colombia	1
`PK` · Pakistan	1

Network (ASN)

fingerprint	co-occurrences
`AS25159` · PJSC MegaFon	3
`AS7303` · Telecom Argentina S.A.	2
`AS268249` · DESTAK NET LTDA	2
`AS5384` · Emirates Internet	1
`AS10620` · Telmex Colombia S.A.	1
`AS28202` · MASTER S/A	1
`AS36925` · MEDITELECOM	1
`AS200590` · NLS Kazakhstan LLC	1
`AS132165` · Connect Communications	1
`AS264689` · Luciano Gabriel Chersanaz (Ubnet Datacenter)	1

TLS supported groups

fingerprint	co-occurrences
`0a0a,11ec,001d,0017,0018,0019`	11