TLS ClientHello (JA4)

t13d3013h1_1d37bd780c83_8537cf56674e

first seen 2026-07-01 15:22 · last seen 2026-10-28 16:59 · JSON

Last 7 days (28 observations)

Distinct clients per day (last 30 days, peak 14/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	`30`
Extension count	`13`
ALPN	`h1`
Ciphers	`002f, 0033, 0035, 0039, 003c, 003d, 0067, 006b, 009c, 009d, 009e, 009f, 1301, 1302, 1303, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030, cca8, cca9, ccaa`
Extensions	`000a, 000b, 000d, 0016, 0017, 001b, 002b, 002d, 0031, 0033, ff01`
Signature algorithms	`0905, 0906, 0904, 0403, 0503, 0603, 0807, 0808, 081a, 081b, 081c, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0301, 0302, 0402, 0502, 0602`
JA4_r	`t13d3013h1_002f,0033,0035,0039,003c,003d,0067,006b,009c,009d,009e,009f,1301,1302,1303,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030,cca8,cca9,ccaa_000a,000b,000d,0016,0017,001b,002b,002d,0031,0033,ff01_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602`
JA4_o (sample)	`t13d3013h1_8d44cdc55eec_5bd17f9d395a`
JA4_ro (sample)	`t13d3013h1_1302,1303,1301,c02c,c030,009f,cca9,cca8,ccaa,c02b,c02f,009e,c024,c028,006b,c023,c027,0067,c00a,c014,0039,c009,c013,0033,009d,009c,003d,003c,0035,002f_ff01,0000,000b,000a,0010,0016,0017,0031,000d,002b,002d,0033,001b_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602`

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
`ge11nn050000_b223a0ebb0b5_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.	56
`ge11nn040000_5d05004232a2_000000000000_000000000000`	25
`ge11nn15enus_539710a1d9ef_000000000000_000000000000`	10
`ge11nn06en00_fb4afd1f380a_000000000000_000000000000`	9
`ge11nn06enus_fb4afd1f380a_000000000000_000000000000`	9
`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.	2
`ge11nn020000_818f42cc3fd7_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.2.0, php-guzzle 8.1.0, php-guzzle 8.0.2, +13 more.The fingerprint page shows the full measured match list. More on the catalog.	1
`he11nn050000_b223a0ebb0b5_000000000000_000000000000`	1
`ge11nn040000_08e7224bf8c7_000000000000_000000000000`	1
`ge11nn060000_6a46c5ae78e5_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`6:58+6:0:1220:65535,9:mss,sok,ts,nop,ws:flow:0`	16
`4:40+24:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:0`	9
`4:57+7:0:1420:mss*30,7:mss,sok,ts,nop,ws:df,id+:0`	8
`6:44+20:0:1360:mss*48,10:mss,sok,ts,nop,ws:flow:0`	8
`4:57+7:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:0`	7
`6:45+19:0:1360:mss*48,10:mss,sok,ts,nop,ws:flow:0`	7
`6:50+14:0:1360:65535,13:mss,sok,ts,nop,ws:flow:0`	6
`6:61+3:0:1220:65535,9:mss,sok,ts,nop,ws:flow:0`	6
`6:60+4:0:1220:65535,9:mss,sok,ts,nop,ws:flow:0`	5
`4:36+28:0:1460:65228,7:mss,nop,ws,sok,ts:df:0`	4

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-4-8-1-3_1220_9`	31
`65280_2-4-8-1-3_1360_10`	15
`65535_2-4-8-1-3_1460_9`	10
`64860_2-4-8-1-3_1380_10`	10
`42600_2-4-8-1-3_1420_7`	8
`65535_2-4-8-1-3_1360_13`	6
`64240_2-4-8-1-3_1460_7`	5
`65228_2-1-3-4-8_1460_7`	5
`64800_2-4-8-1-3_1440_10`	4
`65535_2-4-8-1-3_1380_13`	4

User-Agent

fingerprint	co-occurrences
`curl/8.22.0`	25
`Mozilla/5.0 (Macintosh) Chrome/130 Safari/537.36`	13
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 Chrome/124 Safari/537.36`	12
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36`	10
`Mozilla/5.0 (compatible; YashLeadBot/1.0; +https://www.byyash.xyz)`	7
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36`	6
`python-requests/2.34.2`	5
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) Chrome/126 Safari/537.36`	5
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36`	4
`python-requests/2.32.5`	4

Country

fingerprint	co-occurrences
`US` · United States	62
`PL` · Poland	26
`RU` · Russia	5
`DE` · Germany	4
`CA` · Canada	4
`DK` · Denmark	3
`BR` · Brazil	2
`FR` · France	2
`IN` · India	2
`FI` · Finland	2

Network (ASN)

fingerprint	co-occurrences
`AS54113` · Fastly, Inc.	41
`AS16276` · OVH SAS	28
`AS13335` · Cloudflare, Inc.	10
`AS396982` · Google LLC	8
`AS41601` · NEO Print Ltd.	5
`AS7029` · Windstream Communications LLC	3
`AS13101` · TNG Stadtnetz GmbH	3
`AS204151` · EWII Bredbaand A/S	3
`AS21409` · Ikoula Net SAS	2
`AS16509` · Amazon.com, Inc.	1

TLS supported groups

fingerprint	co-occurrences
`11ec,001d,0017,001e,0018,0019,0100,0101` Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	47